. Memoirs of the American Academy of Arts and Sciences. Fig. 1. Fig 2. By the descent of the treadle the instant before the impression is given, another actionis also obtained, for the purpose of bringing the hammer, m, into a perpendicular direction,in order to meet the block, w, where the legs of the platen all unite. The rod, o, attachedat the bottom to the treadle, e, communicates also near its top by a connecting bar, p,with the hammer, m. The top of the rod, o, is bent, and as it slides down through aguide, 5, by the descent of the treadle, the connecting bar, p, moves the hammer, m, fro
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. Memoirs of the American Academy of Arts and Sciences. Fig. 1. Fig 2. By the descent of the treadle the instant before the impression is given, another actionis also obtained, for the purpose of bringing the hammer, m, into a perpendicular direction, in order to meet the block, w, where the legs of the platen all unite. The rod, o, attachedat the bottom to the treadle, e, communicates also near its top by a connecting bar, p, with the hammer, m. The top of the rod, o, is bent, and as it slides down through aguide, 5, by the descent of the treadle, the connecting bar, p, moves the hammer, m, fromits inclined pendent position into a perpendicular, ready to press directly upon the block, n, ofthe platen. When the foot of the workman is removed from the treadle, e, it rises by the reaction ofthe compressed parts aided by a spring, s ; at the same time the hammer, m, shifts from theblock, n, in order to allow the platen to rise, and the type to be inked afresh. The platen and its arms being of considerable weight, a counterpoise, as it turns ove