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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 83

An illustration from American telephone practice, 1905, leaf 83
FIG. 46.-nETAILS OF SOLID-BACK TRANSMITTER. damping springs, / /, as in the Blake transmitter. IV is a heavymetallic block hollowed out, as shown, to form a casing for theelectrodes. The inner circumferential walls of this block are linedwith a strip of paper, i. This block is mounted, as shown, on…

Telephone

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