Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 605
dingand the rubber tip of the spring. The box hinges are provided with springs soldered toone half, and pressing upon the other half to insure a good 582 EXPERIMENTAL SCIENCE. electrical contact. A magneto bell is generally employedin connection with this transmitter for calling. For long distance… … Circuits of the Telephone. alike. The connections are shown in condition to call orreceive a call. When a call is received, the current passesfrom the line through the switch, E, button, i, key, top con-tact of the kev, bell magnet, and ground wire, A, to theground. When the ke) is depressed to…
Physics · Lantern projection · Electric apparatus and appliances
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