Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . LATHE, METAL-WORKING. 233 The Self-acting Lathe.—The following illustrations relate to an improved self-acting lathe con-structed by William Sellers & Co. of Philadelphia. Fig. 2576 is a side elevation and Fig. 2577 is a plan view of the head-stock of this lathe, if is agear-wheel attached to S for the purpose of driving the feed-motions of the lathe-carriage. Thetrain of wheels between H and the feed-screw are termed the change-wheels, because there are anumber of these wheels of the
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . LATHE, METAL-WORKING. 233 The Self-acting Lathe.—The following illustrations relate to an improved self-acting lathe con-structed by William Sellers & Co. of Philadelphia. Fig. 2576 is a side elevation and Fig. 2577 is a plan view of the head-stock of this lathe, if is agear-wheel attached to S for the purpose of driving the feed-motions of the lathe-carriage. Thetrain of wheels between H and the feed-screw are termed the change-wheels, because there are anumber of these wheels of the same pitch of teeth but of different diameters, or, what is thesame thing, containing different numbers of teeth ; and only those are placed in po- 25*5« sition on the lathe whose numbers of teethare those necessary to effect the properratio of revolutions required under anygiven circumstances to be maintained be-tween the live spindle and the feed. InFig. 2576, J is the cone or stepped pulley,which is driven by the belt. It is fitteda neat working fit to the live or running-spindle S, and revolve
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
