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- · New York, T. Audel · leaf 81
Ques. What is the objection to the metal fuse switch? Ans. The powder is set flying by the explosion of the arc, 1,600 HAWKIXS ELECTRICITY which, as it settles, gets into the bearings of any machine thatmay be in the vicinity. Ques. What is a horn break switch? Ans. One provided with horn shaped… … 2.220.—K.lman switching mechanism. The pantograph arrangement of the contactblades gives a double horizontal break deep down in the oil. This gives over ta heavy head of oil which immediately closes in around the thin blades as they leavethe contacts in opening, thus effectually extinguishing the…
Electrical engineering
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