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 244
elevator through theopening of the line and reverse switch. Shaft limit switches, when used as over travel switches, should beso arranged that it is impossible for the operator to move the car afterthe switch has opened without first going to the elevator machine,thus insuring attention to the… … -J -OOmcr: ld*-JX<< ft 51 c <u ELECTRIC ELEVATORS 2,899 On traction type elevator machines they obviously have to be usedfor both the automatic limits and over travel. For automatically slowingdown and stopping the car three single pole shaft switches at eitherlimit of elevator travel…
Electrical engineering
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