Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 158
Pig. 23. Diagram of Induction CoilShowing Condenser Circuit 136 RADIOTELEGRAPIIir APPARATUS 43 … Fig. 24. Neef Hammer Creak break-, probably invented by Ncef. Its action is perhaps best shownby referring to tlie ccmnion electric door-bell. An electromagnet,in attracting an armatnre, cansesan interruption of the currentenergizing the electromagnet,whereupon the armature fallsback by reason of…
Electrical engineering
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