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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 115

An illustration from 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, leaf 115
a device whichopens or closes an aux-iliary circuit underpredetermined electricalconditions in the maincircuit. Ques. What is theobject of a relay? Ans. Its function isto act as a sort of elec-trical multiplier, thatis to say, it enables acomparatively weak cur-rent to bring into oper-ation a much…

Electrical engineering

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More pictures from 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

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