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 256
form of bellthe current, during operation, is not broken, but as the magnet ELECTRIC BELLS 2,347 attracts the armature, the current is shunted or short circuited,and thus being offered a path of very little resistance as com-pared with that of the magnet winding, most of the currentflows through… … Fig. 3,206.—Bunnell iron box bell. # The protection thus secured excludes dust and protectsthe working parts from injury in exposed places. The armature is pivoted and has ad-justable contacts. The resistance of the winding is 4 to 5 ohms. Ones. Name the essential parts of a shunt bell. Ans. 1, An…
Electrical engineering
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