. Cassier's magazine . ed their high standard, andwill later, when the American or-ganization has become part of theGerman shop, be superior to theAmerican standard, unless the UnitedStates immediately organizes similarschools in her communities. There is a danger in most Ameri-can technical schools, due to the factthat they do lay great stress on theworkshop. The students are apt tolearn to become extravagant with the material provided for practice, andfail to learn the economy of prac-tical shop life. This is guardedagainst in the German schools by do-ing work on a commercial scale. Theprodu
Image details
Contributor:
Reading Room 2020 / Alamy Stock PhotoImage ID:
2CJ1R46File size:
7.2 MB (438.5 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
2021 x 1237 px | 34.2 x 20.9 cm | 13.5 x 8.2 inches | 150dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. Cassier's magazine . ed their high standard, andwill later, when the American or-ganization has become part of theGerman shop, be superior to theAmerican standard, unless the UnitedStates immediately organizes similarschools in her communities. There is a danger in most Ameri-can technical schools, due to the factthat they do lay great stress on theworkshop. The students are apt tolearn to become extravagant with the material provided for practice, andfail to learn the economy of prac-tical shop life. This is guardedagainst in the German schools by do-ing work on a commercial scale. Theproducts of the shop are nearly allsold, and, in many cases, material issupplied by the metal trades in a rawstate (rough castings from the foun-dry for the machine shop) or partiallymanufactured state, to be worked upin the various departments. Theactual conditions of the machineshop, foundry, etc., are thus observedin the schools to a greater degree aspossible. In this way the schoolskeep in touch with the industries. Aik. *sr THE APPLICATION OF HEYLANDS VECTOR DIA-GRAM FOR TESTING INDUCTION MOTORS By J. W. Rogers ALTHOUGH it is a well-knownfact that the circle diagramoffers a valuable and con-venient method of determining thevarious characteristics of an inductionmotor under different operating con-ditions, information dealing with theresults of actual tests worked up withthe aid of Heylands diagram is notoften met with, and for this reasonthe writer thinks a practical exampleof its use will prove of interest, be-ing generally considered the most ac-curate method of determining thecomplete performance of an induc-tion motor. Before dealing with the applica-tion of the circle diagram it may bewell to mention a few facts con-nected with the theory of the induc-tion motor, and also the graphicalconstruction by which these facts arerepresented, from which the con-struction of the diagram as used inpractice has been developed. As iswell known, graphical constructionrepresents the magn