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 243
grounds or short circuits in some partof the control system. Connections to the limit switches are so designed that after the carhas been stopped automatically at either limit of elevator travel it ispossible for the operator to start and immediately accelerate to fullspeed in the opposite… … BRAKE HSTOfflfiP— Fig. 4,164.—Diagram of Sprague direct current magnet controller for type T and Y Spraguesidewalk elevator. are arranged to be operated by the car which, on passing a givenpoint, opens the switch thus introducing an additional break in thecontrol circuit and insuring the stopping…
Electrical engineering
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