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 269
net, then by the other. Fig. 3,225 2,360 HAWKINS ELECTRICITY shows the essentials of a differential and alternate bell. In thefigure F and G are the two magnets of which M and D are thetwo windings of F, and S the single winding of G. Ques. Describe the operation of the differential andalternate… … B BELL B BELL Fig. 3,225.—Elementary differential and alternate bell. It employs two separate magnetsF and G, of which F has a magnetizing coil M, and a demagnetizing coil D, and G has asingle coil S. The magnetizing coil M is connected direct to the terminals, while the de-magnetizing coil D, and…
Electrical engineering
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