Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 256
t running continuously elevators are sometimes drivenfrom a countershaft, the latter being belted to the line shaft. Very often the elevator machine is driven directly from the line shaft,and as the line shaft always runs in the same direction the only way inwhich the elevator machine can be… … S7\ •w r . 1 a Figs 4,178 and 4 179.—Single motor traction drive with traveling pulleys. Fig. 4,178, primarytorm; tig. 4,179, modified form. This drive differs from the Fraser arrangement in thatbut one motor is used instead of two. The motor in this system runs at slow speed and,by means of the…
Electrical engineering
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