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 239
e proper working of the oscillation arc.The transformer used for inductive coupling with the aerial is ofcompact flat spiral design, the primary and secondary being placedside by side in a loose inductive couple. For telegraphic and call-ing purposes, a device for rapidly interrupting the steady… … Fig. 20. Circuits of the Collins System da.shes. The telephone transmitter, which is introduced betweerthe aerial and the ground, is out of circuit during such a performance.A hot-wire ammeter is placed in the aerial circuit to indicate whenthe latter is in tune. For the detector, a form of the…
Electrical engineering
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