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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 79

An illustration from American telephone practice, 1905, leaf 79
many others areof this type, and differ merely in the arrangement and number ofelectrodes. They give, as a rule, more powerful results than thetransmitters having a single pair of electrodes, but most of them aresubject to the grave defect of breaking the circuit entirely when sub-jected to loud… … C t FIG. 41.-TIIE CROSSLEY TRANSMITTER. the relative positions shown. These are hollowed out to receivethe conical ends of the carbon pencils, A, B, C and D, which aresupported loosely between them. The blocks, H and G, form theterminals of the transmitter. The current divides at the block, H,and…

Telephone

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