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 93
t passes through a little chamberC filled with granular carbon to the conducting back d of the trans-mitter, and thence through the primary p of the induction coil, andback to the battery. As the diaphragm vibrates it varies the pressureupon the many contact points of the granular carbon through… … Fig. 78. Sectional View of Modern Telephone Receiver. Receiver t Transfnitter Receiver
Electrical engineering
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