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 246
s thebutton mounted in the top ofthe handle, this action occur-ring naturally when the oper-ator places his hand on the leverto operate it. Should the oper-ator remove his hand from thecar switch while the elevatoris in motion a centering springthrows the lever to the off posi-tion and brings the… … ELECTRIC ELEVATORS 2,901 switch will therefore entirely disconnect one side of the control systemfrom the line, and this switch, in connection with the car switch, makesit impossible for any combination of ground or short circuit to pre-vent the operator stopping the car at will. Alternating…
Electrical engineering
Internet Archive · Brigham Young University · Public Domain Mark 1.0. Free to use for anything.
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