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Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ri^ -»o parting to the center of the pattern without theuse of the trowel. 78 PATTERN MAKING To make this pattern it is best to lay out on aplain board the design or outline, as shown inFig. 41, dividing the rim into any number ofequal parts. In this case there are six equalparts. One of these parts is a suitable patternfrom whic Stock Photo

RM2AKG66C–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ri^ -»o parting to the center of the pattern without theuse of the trowel. 78 PATTERN MAKING To make this pattern it is best to lay out on aplain board the design or outline, as shown inFig. 41, dividing the rim into any number ofequal parts. In this case there are six equalparts. One of these parts is a suitable patternfrom whic

RM2AKFC2E–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . coreiox 8r swefjg- paring tools, planes, etc., until no bumpsappear when rubbing the hand endways along 134 PATTERN MAKING l^- fot the pattern. Lastly, put a leatherfillet^ at d and finish with shellacin the ordinary manner. Themaking of a core box for thiselbow is very similar to themaking of the pattern itself,except that the

RM2AKGD0F–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . 7^7^ J30 68 PATTERN MAKING half circular portion of the pattern c, Fig. 31.The only difficulty to be met with in makingthis pattern is the miter joint ^, which isfound by the intersection of parallel lines of equaldistance from each other on the straight side,with similar circular lines struck from the center .^^^^^^^^;^^^^^;^^^^

RM2AKGHBY–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . nd the pattern until a perfect V/eTf cartel core -|j|fw:r:r7:^^^^r3^g-^l^:- A .-v.-f-^^*; SnUonal view of mould foT Fig 6 Wio¥mff pattem m 9and parting is made, sometimes cutting deep cavitiesaround portions which otherwise would tearout the sand in drawing the pattern. In thismanner an expert moulder will get out formswhich at

RM2AKGG4M–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . jFy 9 been left light. In moulding patterns of the classshown in Figs. 9 and 10, the process is much thesame as has already been described. The lugsa a, Fig. 10, are made removable, andwhen removed the pattern. Fig. 9, is laid flat onthe follow board. The drag is then placed inposition and rammed up; then it is turned overand th

RM2AKCRRF–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . PfiOC $^00 FREDERICK J. DRAKE & CO, 211-213 E. Madison 5t., Chicago. F^itn Engines ami How im Run Tiiem ^IK?#gS BySTEPHESSS&a, MAGGARD A CQOY, Expept EesijIfSfi^ss ^. Fully Illustrated wlth:about 7P beautiful woodcuts. A complete instructor for the operator or amateur. The book first gives a simpledescription of every part of abo

RM2AKFR6H–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . AND FOUNDRY PRACTICE 121 needed. Next make the partition slides d. Fig.79, one for the middle partition c and one forthe short partition b, Fig. 79. Now make twomore slides e e, which are the dupHcates of theslides d d, except that they cut off at the insideof the core box. These also are only used tostop up the slot when not in

RM2AKFXB1–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . •^•^;v.b;.:^::-;M1: ever, is more than from a pattern, and in veryheavy work the saving of the extra cost wouldpay for the pattern. It is possible to sweep a. pattern which will not draw in the ordinarymanner, also circular castings having projectionsof various kinds may be swept by having wood AND FOUNDRY PRACTICE 111 patterns o

RM2AKCWRE–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . e-nomena, cannot be overestimated, andwill not be, by the thoughtful assidu-ous and ambitious electrician, becausehe knows that a thorough understand-ing, on the spot, and in the presenceof any phenomena, effected by the aidof his little vest-pocket book of refer-ence, is far more valuable and lastingin its impression upon the mi

RM2AKG6C6–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Tfq o3-yCraiJ jMfjoTi throtigh.nxoulot ^l^^y/a^ pattern-in tTtcsanB. Paris and the plaster cast so obtained is used fora follow board. This arrangement brings the.

RM2AKFDEN–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . j/alf pattern for l^rge fjiov/ sTiaWirit^ cross Sectioft «» fiati^e 132 PATTERN MAKING for the core prints. Secure these with largewood screws and glue to the pieces b and c,. Corcdok foT 1ar^<e. elboW Dvued jine^ sftt^ Ttbi as shown in Fig. 94, taking care that aproper allowance is made for the thicknessof the lagging. Then g

RM2AKCTF8–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . rge number of diagrams, showing howthe Square may be used in finding Bevels, Angles, Stair Treads and bevelcuts for Hip, Valley, Jack and other Rafters, besides methods for layingout Stair Strings, Stair Carriages and Timber Structures generally. Alsocontains 25 beauxiful halftone illustrations of the perspective and floor planao

RM2AKGFKF–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . t least y^rT^ three feet long, SX^yX^^, and slightlybeveled toward the edges, with a head 2iXifastened securely at right angles to the blade.The most approved form of joint for a T-squareis shown at a 6, Fig. 13, A tapered dovetailedwedge is glued to the blade of the square with >-- Dove, tail we^j9«- -I 1^ . E ri3 IS the grai

RM2AKFW00–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Ti 3 ^B AND FOUNDRY PRACTICE 113 care being taken that they were exactly in posi-tion, where they could be secured by packing alittle sand around them. Now the cope was puton and rammed up, great care being taken not tomove the hinges. Nextthe cope and hingepatterns, which re-mained in the cope,were removed. Now 7:)^ ^^ the cente

RM2AKCR0A–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. .

RM2AKFAWW–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . FREDERICK J. DRAKE & CO. PUBLISHERS211-213 E. Madison Street « « Chicago, IIL STEAM BOILERS.THEIRCONSTRUCTION, CAREAND OPERATION, with questionsand answers. By C. F. swingle, M. E. A complete modern treatise, fully describing, with illus-trations, the steam boiler of various types. Construction and rules for ascertaining thestren

RM2AKFTP4–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . se of two half-circles of plank ofthe desired radius, secured in position with threestrips of wood, as shown in Fig. 6Q. The core ispacked in this frame and swept off with a straight-edge. Or it may be required to sweep up astraight, round core of different diameters, hav-ing offsets, etc. To do this, get out a plankwhich is of t

RM2AKFBND–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Such a pattern would not draw if divided inthe ordinary manner; but the work becomessimple enough when parted as shown in Figs. 102and 103. The projections for receiving the ends j9aHinq. of the rail are left loose from the pattern and aredrawn out of the sand after the pattern is lifted,and these, being hollow, leave their own c

RM2AKFJ2C–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Parfirt^ Vforkinj drawing Xoohin^ HoWrt ting the necessary core print on the outside ofthe hinge piece, but this cannot be illustrated 126 PATTERN MAKING in this view of the pattern. Next make a com-plete core box, as shown by the working drawing.Half of such a core box is shown in Fig. 87.Little strips of wood a. Fig. 87, or blo

RM2AKGF7C–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Fi^ i<i miter joint. The second one contains angles of30°, 60° and 90°. This square is employed tolay off the hexagon, or bisect the angles of thehexagon in order to obtain the hexagon miter.The third one contains angles of 22^°, 67J° and90°, and is used to bisect the angles of theoctagon, obtaining the octagon miter (see a 6

RM2AKGG1P–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . urther illustrated andexplained by the use of dotted lines, figures, let-ters, etc. For certain purposes mechanical draw-ings are sometimes made in perspective; but forpattern shop uses perspective effect is neveremployed. Two or more views of any object Fig. 00 treated should be given in a mechanical drawing.The art of drawing i

RM2AKFJEJ–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . 7y g^ Cro33 section through oil box AND FOUNDRY PRACTICE 125 paint the inside as in Fig. 86. The core printa, Fig. 86, and the hinge for the lid 6, Fig. 86,. £5 MS 3ecftonal Worhhg ayaW^nff^ rfHlt cm-K Wriii9 should be added to the original block. Thishinge may also have the slot for the lid coredthrough it in the ordinary way;

RM2AKFF3M–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . *rh€ Worlii-n^ SiraWiii^ for pijae ^boW this pattern, take a piece of stuff of properdimensions and into the face turn a semicircular AND FOUNDRY PRACTICE 129 groove of the radius desired. Cut this plank inquarters, using one of the parts for the curved. portion of the box, which is finished by gluingon strips in which proper sem

RM2AKFP6D–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . make the vent holes c c c, Fig. 75, which let thesteam out into the bell of the whistle. ( ^ 5*lerp. There is a variety of cast parts used in locomo-tive and car work, such as draw bars, truck AND FOUNDRY PRACTICE 123 pedestals, oil boxes, etc. These castings, whileapparently very common and rough to look at, callfor considerable

RM2AKGJCB–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . agonal position with ashort bar or chisel, used as a pry, and which holds theboxes firmly together. For small work the flask ishinged together on one side with an iron hinge so designedas to be readily slipped apart. ^ The vents or holes down through the cope for pour-ing the metal, are called gates, and are made by placingtapere

RM2AKFT2F–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . AND FOUNDRY PRACTICE 119. Cross 3rcHo-n of iell to C. W. Sherwood, now of Racine, Wis., whoproduced the pattern as here shown, which hasproven very satisfactoryin its operation. A clear idea of thiscasting may be derivedby reference to Figs.73, 74 and 75. Fig. 73shows a cross-sectionthrough the bell of thewhistle and the base,bot

RM2AKFRBM–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . 7>y rs- Cro9s 3cetzoit of Arae 120 PATTERN MAKING possible to make. Next make the pattern forthe bell, Fig. 76, and the base, Fig. 77.Now make the core box as shown at a-b inFig. 78, two slides, c-c. Fig. 78, being made for Thr-ft rry. the openings at the upper end. One slidereaches almost across the opening and joins withthe

RM2AKGN1G–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . £11 £ Cto^H section ihrotigh pattern rn Ihe^ ^and place and filled up as previously described. SeeFig. 3, which shows a cross-section through themould finished and ready to receive the moultenmetal. ^ The next form to be considered is of a classwhich, while being all in one piece, is of such a ^ It is deemed more expedient to m.a

RM2AKGGX4–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . on work which could be drawn in the ordinarymanner, and this is when the casting is hollowand thin enough to spring easily. In all caseswhere cores are used, the pattern, instead ofbeing the shape of the desired casting alone,should have certain projections, termed coreprints, added to it. These core prints leavetheir impression

RM2AKFX2B–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . pattern which will not draw in the ordinarymanner, also circular castings having projectionsof various kinds may be swept by having wood AND FOUNDRY PRACTICE 111 patterns of the projecting parts. To illustratethis is cited an instance of a casting which wasmade at the Frisco R. R. shops last winter at CapeGirardeau, Mo. This cast

RM2AKFA26–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . o current, How to install and manage batteries. How to test batteries. How to test circuits. How to wire for annunciators; for telegraph and gas lighting. It tells how to locate trouble and ring out circuits. It tells about meters and transformers. It contains 80 diagrams of electric lighting circuits alone. It explains dynamos a

RM2AKG1TD–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ^IS 57 this it is lifted and moved, taking (jare that thelast cog on the pattern exactly fits the impressionin the sand. Ram this up again and move thepattern as before. Continue this until the com-plete circle is made, which will be an impressionof the complete gear. Since seeing this I have 100 PATTERN MAKING used the same plan

RM2AKFBEK–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . of the rail are left loose from the pattern and aredrawn out of the sand after the pattern is lifted,and these, being hollow, leave their own core inthe sand. A suitable core box for Fig. 101 may be made 136 PATTERN MAKING of the form shown in Fig. 104, especially if anygrooves, moulds, etc., are to be shown on thecore to corresp

RM2AKGP38–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . •<•• Tl-. £11 £ Cto^H section ihrotigh pattern rn Ihe^ ^and place and filled up as previously described. SeeFig. 3, which shows a cross-section through themould finished and ready to receive the moultenmetal. ^ The next form to be considered is of a classwhich, while being all in one piece, is of such a ^ It is deemed more exp

RM2AKGC87–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . 7^^ 3/r 70 PATTERN MAKING intricate task and is clearly illustrated in Fig. 36,which contains a sectional view of the finishedpattern. To make this pattern, cut out the discs a a.Fig. 36, of proper size for turning up. To these. T^a7fC f oj tvrrnTto co-re hote for Tiq 30 discs glue the band h in sections, and to one discthe core

RM2AKGDT2–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . working drawing, which, as has already beenstated, must show the casting, the core and thecore prints. Fig. 27 shows a cross-sectionthrough the casting and core; this being the onlydrawing needed for making the pattern. Thispattern was made by gluing together pieces ofmaterial of ordinary size, as a solid block sufii- 64 PATTERN

RM2AKGE78–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . n itbegins to set it is polished, while still revolving,with an old cloth and a few drops of linseed oil. Fig. 6 represents the piece sawed out as nearto shape as possible and then carved or whittledand finished with sandpaper and shellac. Passing on to another class of patterns, thestake pocket affords an apt illustration. Thisp

RM2AKG2RX–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . TJ^ 53 of the casting, the parting is made without anytrouble. As an example of a pattern of thiskind the aisle end for a car seat has beenselected. This pattern was arranged in such amanner as to be divided in the middle, so thatthe upper portion is cast separate from the legand used for the wall end of the seat. (See Fig.53, a

RM2AKG3J4–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . centers so established and finish in the usualmanner. Fig. 49, showing an iron dome with projectingornament at the top and a handle at each side, ishere introduced as a sample of what may bedone with hollow cores. Assume that a roughform has been glued up as shown in cross-sectionin Fig. 50. Attach this form to the lathe andturn

RM2AKCW3A–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . to Chemi-cal Batteries and Light and Power; two each to Terrestrial Magnetismand Electro-Magnetism; one each to Atmospheric Electricity; LightningRods; Electro-chemistry; Applied Electro-Magnetism; Force, Workand Energy; Practical Application of Ohms Law; also a chapter uponMethods of Developing Electricity, other than Chemical.

RM2AKFEM3–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . portion of the box, which is finished by gluingon strips in which proper semicircular notchesare cut, and with additional strips for closing theends of the box. Thisis clearly illustrated inFig. 93. As the corebox is alike at bothends, the core will re-verse and glue together;therefore a single box isall that IS necessary. ==• •=

RM2AKFHT7–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ria fie ffd7f of f-rnisiheS paHeitt slides, projections, etc., that may be required bythe nature of the work. A rather neat piece ofwork is a double-flanged elbow for a steam pipe,as shown in Fig. 88. Assuming this to be for asmall pipe, say 4-inch, it becomes a simplepiece of lathe work. Having made a proper AND FOUNDRY PRACTICE

RM2AKG7A2–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Joi-n t Tig ae but this method is given more as an illustrationof what can be done than as a sample of goodpattern shop practice. Many difhcult or otherwise impossible formscan be cast by using a three-part flask. Thedouble-flanged gear wheel, Fig. 40, a and 6, is anillustration of work usually cast in a three-partflask. It can a

RM2AKFTD4–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . is now illustrated which,when properly made, is a simple matter; yetbefore the reasonable solution of this problem wasfound, it had cost the firm doing the work alarge sum of money. The problem was to casta triple locomotive chime whistle, having threeseparate compartments of different lengths in thebell, and three chambers for s

RM2AKFB9J–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . an and then, by closely following the make-up of the book in the succeeding pages, will be able to gain a thoroughknowledge of the construction, maintenance and operation of all types ofengines. Breakdown, and what to do in cases of emergency, are given a con-spicuous place in the book, including engine running and all its varied

RM2AKCWA1–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . The L-itest, Best and 3Io8t Complete Book on Engineering and Electricitypublished. Written by practical Engineers and Electricians in a waythat you can understand it. UP-TO-DATE 1904 EDITION. ^he 20th Century Hand BookE^ngineers and ^Electricians A COMPENDIUMof useful knowl-edge appertain-ing to the care andmanagement of SteamEng

RM2AKFED4–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . 130 PATTERN MAKING. TVy £f

RM2AKFXN2–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . C/-rcy<i3 se^c-tfoii tltToiisT* :5^noh€ hot c^oor no PATTERN MAKING pieces are required, it is often better to usesweeps, as they save the cost of making a pat-tern. The cost of moulding from sweeps, how-. •^•^;v.b;.:^::-;M1: ever, is more than from a pattern, and in veryheavy work the saving of the extra cost wouldpay for the

RM2AKFFB7–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ^^9 88^ doxible flcnt^€J3i sfeam yaxjae elioW in Fig. 92, and it should be painted in the joint,as shown in Fig. 92. To make a core box for. *rh€ Worlii-n^ SiraWiii^ for pijae ^boW this pattern, take a piece of stuff of properdimensions and into the face turn a semicircular AND FOUNDRY PRACTICE 129 groove of the radius desired. C

RM2AKG0E3–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . To make a mould for Fig. 63 with this set ofsweeps, the floor of the foundry is first leveledoff and a stake driven down, leaving enough. Try G3 above ground to operate the sweep. The firstsweep is then put on, the sand packed about thestake and a hill is formed representing the out- AND FOUNDRY PRACTICE 107 side of the casting.

RM2AKG4W8–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . -rig -^3 AND FOUNDRY PRACTICE 81 their adjustment to one another to require onlya light blow to drive them home. (See Fig. 44.)Lastly finish up the spokes as desired and coatwith black shellac varnish. The making of cog or gear wheels is one ofthe most important features of the pattern. makers trade, and although a drawing or blu

RM2AKG6P4–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Tig 3© peculiarity in the construction of this particularpiece. In this pattern. Fig. 41, nothing is re-quired but a plain wooden wheel. The squarehole in the center, being tapered, makes its owncore. AND FOUNDRY PRACTICE 77 When a great number of wheels arc wantedthe pattern is bedded half its depth in plaster of. Tfq o3-yCraiJ

RM2AKGMDB–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . mak-ing the mould depends entirely upon the nature of thework and the purpose for which it is to be used. Thus it will be found that all, or nearly all, stove cast-ings are made in a manner exactly the reverse from thatwhich is employed in the moulding of ordinary castings.The hollow or concave parts are usually made down inthe d

RM2AKFYCH–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ^ -patr^oftmimttry awe^Tja arrangements should be made for supporting thesand. It is possible, for certain special work, to sweepboth cope and drag; but it is seldom done. There are various reasons for using sweep AND FOUNDRY PRACTICE 109 work, the first and most common of which isfrom a consideration of economy, as where apatter

RM2AKCREH–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . jects as scale in the boiler, economical firing, sparks,pressure, low water and danger of explosions, lining andgearing the engine, setting the valves, oiling, working injectorand pump, lacing and putting on belts, etc. There are twochapters on Farm Engine Economy, giving the theory of thesteam engine, especially in its practical

RM2AKG806–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . in an inverted position and filled about half full,or within about two inches of the top, and thesand smoothed down solid. The pattern is thenturned with the spoke side up and pushed downhard into the sand. It is then taken out to seethat the impression is perfect, and a parting ismade at i. The pattern is then put back in itspla

RM2AKFD8P–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Tig 0r CroM section throiigTi core Trox AND FOUNDRY PRACTICE 133 enough below the surface to allow truing up.Then go carefully over the work with sharp.

RM2AKGERG–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . itili itoseci cAist? The parting tool, Fig. 20, is used for cuttingdeep grooves and for cutting off work in thelathe. The diamond point. Fig. 21, and the 52 PATTERN MAKING bull-nosed chisel. Fig. 22, are used for turningboth the outside and inside surfaces of hollowpatterns, such as the piece shown in cross-sectionin Fig. 23. Fig

RM2AKFJAX–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . £5 MS 3ecftonal Worhhg ayaW^nff^ rfHlt cm-K Wriii9 should be added to the original block. Thishinge may also have the slot for the lid coredthrough it in the ordinary way; that is, by put-. Parfirt^ Vforkinj drawing Xoohin^ HoWrt ting the necessary core print on the outside ofthe hinge piece, but this cannot be illustrated 126 P

RM2AKGC06–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . T^a7fC f oj tvrrnTto co-re hote for Tiq 30 discs glue the band h in sections, and to one discthe core print c. Next attach the prepared discsto the lathe and turn up, as shown in cross-sec-tion, Fig. 36. Turn up two core prints, d d,and dowel the two halves together, making thefinished pattern. AND FOUNDRY PRACTICE 71 Three core

RM2AKFWK2–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Tigs/* 112 PATTERN MAKING No. 2. A face view of this casting is givenfor the purpose of locating the hinges, etc.(See Fig. 063.) Next wood patterns of the. 7Vy ©s hinges were made, leaving the pivot holes tobe drilled after the casting was completed.Then into a suitable drag box or the foundryfloor a stake was driven to such a po

RM2AKGB9A–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . TJj 3^ pattern in a two-part flask without any corewhatever, and although this method is not recom-mended because of its greater cost and inferiorityto other ways of doing the work, it is well thatthe pattern maker should be familiar with theprocess. To make this pattern the wheel shouldbe made as shown in Fig. o34, with spokes a

RM2AKFWCB–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . 7Vy ©s hinges were made, leaving the pivot holes tobe drilled after the casting was completed.Then into a suitable drag box or the foundryfloor a stake was driven to such a point as to allow No. 1to turn freelywith the outerend at the part-ing in the boxor floor. Thenthe sand waspacked and the sweeps moved until the formwas perfe

RM2AKG3BG–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . so be constructed so that the bottom of the box isthe center of the core. In this case the cores gotogether just the reverse of the ordinary way. AND FOUNDRY PRACTICE 91 Next turn out the handles and finial of the de-sired form, rip them apart and fasten the halvesinto the bottom of the core boxes as in Fig. 52.A core moulded in

RM2AKFM70–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . f>tat€D JiOTtijitudtual section throtigh oil hot rial to build up a block of the entire thickness ofthe core, making the parting in the center.Next get out two sidepieces of sufficient thick-ness to complete the pat-tern. (See a 6, Fig.85.)Now dowel the two cen-ter pieces together andglue up the remainderand this will form a b

RM2AKG0T6–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . deemed ex-pedient to have cast without the expense of apattern. The sweeps are nothing more thanplain plank cut to the desired form and arrangedto revolve around a stake driven into the floor ofthe foundry. The sand is packed in front of thesweep and the sweep moved around, thus scrap-ing the surplus sand away until the desired f

RM2AKG31M–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . TJ^ 53 of the casting, the parting is made without anytrouble. As an example of a pattern of thiskind the aisle end for a car seat has beenselected. This pattern was arranged in such amanner as to be divided in the middle, so thatthe upper portion is cast separate from the legand used for the wall end of the seat. (See Fig.53, a

RM2AKGKF2–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . de of the sheet. In small shops where repair workis done, the ingenuity of the flask maker is often taxedto devise means for making flasks perform work for whichthey were not intended, for the reason that in cases whereonly one piece of casting is required, the cost of makinga special flask would be more than the value of the cas

RM2AKG1CM–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . making of an entire pattern can and in somecases should be avoided. Another problem of a similar nature is foundin making a large pulley or flywheel where thecost of making the pattern is not justified by thenumber of v»diecls required. To make the mouldfor such a pulley, first construct the form of theradius desired for the rim

RM2AKFAEX–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . xplains safety rules invogue throughout theUnited States. It is alsoof especial value to elec-trical inspectors, as itpoints out many of thetricks practiced by un-scrupulous persons in thetrade. The book also contains anumber of tables giving di-mensions and trade num-bers of screws, nails, in-sulators and other materialin genera

RM2AKGPHY–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . drawn, leaving apart in the sand to be removed later on; or if itbe a cavity, it must be cored out. In preparing this work I have begun with thesimplest forms and kinds of patterns, progressinggradually through the more difficult features ofthe work, and for illustrations I have used prin-cipally patterns which may be found in du

RM2AKGBJW–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Qyte lidlf of cott lox for Tig 30 cores marked h 6, Fig. 35, B, and a circularcore box turned into the face of a plank (seeFig. 39, a and fe), which will mould half of thecore d shown in Fig. 35, B. A pattern for this wheel can be made withoutcoring out the flanges, by contriving the pattern 72 PATTERN MAKING to part near one sid

RM2AKFPTK–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ris Tj 122 PATTERN MAKING The top b is turned up, as shown, and the par-titions d d d glued to it. The cores cc. Fig. 80,. make the vent holes c c c, Fig. 75, which let thesteam out into the bell of the whistle. ( ^ 5*lerp

RM2AKG8A8–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . T75 3<r. in an inverted position and filled about half full,or within about two inches of the top, and thesand smoothed down solid. The pattern is thenturned with the spoke side up and pushed downhard into the sand. It is then taken out to seethat the impression is perfect, and a parting ismade at i. The pattern is then put ba

RM2AKFNPB–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . There is a variety of cast parts used in locomo-tive and car work, such as draw bars, truck AND FOUNDRY PRACTICE 123 pedestals, oil boxes, etc. These castings, whileapparently very common and rough to look at, callfor considerableskill in the mak-ing of the pattern.As a sample, anordinary oil boxhas been selected.(See Fig. 81.)Th

RM2AKGE32–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . smoothed up, making all parts of the mould meetand match. Next four holes should be bored atc c c c, Fig. 24 6, making the tenons just largeenough to fit snugly into the holes. Then theentire work should be smoothed and polishedmaking the parts which are to be iron jet black,and leaving the core prints in the natural wood.Followi

RM2AKFYYK–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . A much more diflficult operation is one where thecasting is of such a form that it is impossible tolift the cope from the outside. (See Fig. 62.)In this instance a hole is swept into the drag—orfoundry floor, as the case may be—having theform of the inside of the casting. (See Fig. 64.)The cope is then placed in position, rammed

RM2AKCTPG–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . DYNAMO TfcNDINQ. ENGINEERS Or, ELECTRiCJTYFOR STEAM ENGINEERS By HENRY C. HORSTMANN andVICTOR K. TOUSLEY,Authors of Modern Wiring Diagrams andDescriptions for Electrical Workers. This excellent treatise is written byengineers for engineers, and is a clearand comprehensive treatise on the prin-ciples, construction and operation of

RM2AKFRMB–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Cross 3rcHo-n of iell to C. W. Sherwood, now of Racine, Wis., whoproduced the pattern as here shown, which hasproven very satisfactoryin its operation. A clear idea of thiscasting may be derivedby reference to Figs.73, 74 and 75. Fig. 73shows a cross-sectionthrough the bell of thewhistle and the base,both of which are hol-low and

RM2AKCT5P–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . containing hundreds of quickmethods for performing work in carpentry, joining and general wood-work. Like all of Mr. Hodgsons works, it is written in a simple, everyday style, and does not bewilder the workmg-man with long mathematical formulas or abstract theories. The illustrations, of which there are many, are explanatory, so

RM2AKGF0J–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . hose in general use, are shownfrom Fig. 16 to Fig. 22. Fig. 16 represents the pattern makers gouge,which is made in all sizes from J to 2 inches.This tool is used for making core boxes and forparing out all kinds of convex surfaces. It isindispensable to the pattern maker. Fig. 17represents the turning gouge, about three sizesof

RM2AKGGF3–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . F/> e its thinness it is more apt to spring out of shapethan if it were cast with a core, as shown inFig. 9. Patterns are painted in such a way as to showwhich portions are iron, and the core prints areleft white or painted of a light color. Usuallycolored shellac is used for the black portions anduncolored for the core prints

RM2AKG7EE–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . and rammed up. The flask is then inverted andthe vents made, when the pattern will appear asin Fig. o34. The cope, which should part along C o 73 e. J. •... • >.• &hoY/inq hoW I^rtjSt nrny levtoiildecl rn a It/opart the line c d i e f, is now removed, as is also thepattern from the line a b upv/ards. The flaskshould then be pu

RM2AKG573–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ring may be turned over and yetbe secured to the face plate in its exact formerposition. Another way to maintain the ring inits proper position when turning it over is to tackfour httle blocks or brackets to the face plate sothat they will just touch the work to be turnedover on either the inside or outside of the circle. 80 PATT

RM2AKG47C–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . o finish, shellac varnish, as beforedescribed, is used. Patterns of this class are usually parted by themoulders trowel along the center of the spokeand at one edge of the rim. Fig. 47 represents a pair of miter gear wheelsin mesh. Beveled gear work may be either amitered gear wheel as shown (in which case thepitch line is at an

RM2AKGCEE–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . can be coped together,the circular part of the core box can be turnedinto the face of a plank of suitable size, which,when cut across the line of its diameter, formsthe circular part of the core box. The re- AND FOUNDRY PRACTICE 69 mainder will have to be carved out with gougesand the finished core box made as shown in Fig.33. It

RM2AKG09J–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Try G3 above ground to operate the sweep. The firstsweep is then put on, the sand packed about thestake and a hill is formed representing the out- AND FOUNDRY PRACTICE 107 side of the casting. When complete, a parting ismade and the cope placed in position andrammed up. Gates are then made and the coperemoved. The second sweep is

RM2AKGDDN–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . h core.^ Fig. 30 shows a cast pipe fitting which was AH patterns should be painted so as to distinguishmetal from core. Patterns for iron should be dark withlight cores, and just the reverse for brass. All patternsare finished in shellac, rubbed to a polish. AND FOUNDRY PRACTICE 67 used for steam heating. This fitting has beensel

RM2AKCPRH–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. .

RM2AKG2E0–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . 7V^ S-f end was laid out full size, taking dimensionson a straight-edge and carrying them over. TJQ erg-37rOv9 yrnisTn^ fnijitterrt -in place on faJfoW JocrcL to the curved surface. In cases where the fin-ished pattern had to project below the face of AND FOUNDRY PRACTICE 95 this follow board, as shown by the core printsa-a and

RM2AKG28M–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . ce of machinerywhich was damaged in shipping. It had a largecircular gear about 8 feet across without spokesor hub which was broken in two or three pieces.This was an old, out-of-dale machine and it was ri 1— 1 ! I— L d ! 1 r ! cc ! L— —J not possible to procure a gear from the originalpattern and it was considered too expensive

RM2AKFE5M–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . TVy £f. Tt^ 93 €for€ hox fot* STixalJ ^izeS elhaW AND FOUNDRY PRACTICE 131 this elbow is 4 feet in diameter, then wehave an entirely different proposition to con-sider, and instead of a piece of lathe work we

RM2AKFH72–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . cross-section, as shown in Fig. 90. This ring isthen cut into quarters, two of wliich make theprincipal part of the pattern. Next turn up twopieces (see Fig. 91) in two parts each. These, 128 PATTERN MAKING when doweled to the quarter circles alreadymentioned, make the desired pattern, as shown. ^^9 88^ doxible flcnt^€J3i sfeam y

RM2AKG5N9–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Tis ^f AND FOUNDRY PRACTICE 79 the tool will cut as nearly even all around as pos-sible and turn up the ring so that it will be incross-section, as shown in Fig. 43, using a thinwood or metal pattern to secure the desiredshape. (See Fig. 43.) Now, with the turningchisel, mark the face plate lightly as a guide, in. order that the

RM2AKG4JG–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . xis on whichthey revolve, and transmitpower from one shaft to an-other running at an angle,usually at a right angle, toitself. The pitch line of agear wheel is an imaginaryline running around the wheelthrough the cogs at a pointwhich is governed by the number and sizeof the teeth. The pitch diameter would bethe diameter of the wh

RM2AKFB4X–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . *m^f A MANUAL of useful information for platers and others who wish to•^*- become acquainted with the practical art of the electro-depositionof metals and their alloys, including Electro-deposition of Metals, Electro-deposition of Alloys, Electroplating Dynamos, Electroplating Solutions,Electroplating Apparatus. This book has bee

RM2AKG3WG–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . the axis on which the gear revolves and a athe pitch Hne. Assuming, for convenience ofcalculation, that the pitch diameter d-e and d-fare 7 inches in length and the number of teeth22, the circumference at the pitch diameter / ^ I 9 ^. ^ « 1 ^ ^ N ^^^ 1 >^ * .^ / / f /^^ t: / / / ^^ ^ • X / . ^^ v • .^y^^ ^^^-

RM2AKFDRR–Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . Tt^ 93 €for€ hox fot* STixalJ ^izeS elhaW AND FOUNDRY PRACTICE 131 this elbow is 4 feet in diameter, then wehave an entirely different proposition to con-sider, and instead of a piece of lathe work we. have a problem in construction which should be solved in the following manner: Get out the two circular flanges, a a. Fig. 94, wh

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