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 260
given in fig. 4,166. The advantages of the Fraser type of elevator, besidessmall shaft space required for its operation, are rapid acceleration and quick stopping, andthe ability to reverse from full speed in one direction to full speed in the opposite directionwithout producing excessive strains…
Electrical engineering
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