Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 353
ledboth magnetically and by a short and some-what stiff helical spring which allows onlya very small amount of play. The coherercircuit windings on the polarised electro-magnets is very long, and has a resistanceof about 10,000 ohms (see also Eelay). ForMarconis magnetic detector see Wave De-tector… … Fig. 6.—Diagram illustrating Complete lodge-Muirhead Transmitting and Keceiving Station ST, Sending tranformer. M, Motor, af, Alternator field. A, Alternator. Ai, Ammeter, v, Voltmeter. SE, SendingKey. DOA, Upper capacity area. LOA, Lower capacity area. MS, Multiple spark. I, Inductance. WR, Wheel…
Electrical engineering
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