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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 726

An illustration from American telephone practice, 1905, leaf 726
for the second, third andfourth digits in the number, the second movement of the dial impart-ing to the second selector the required vertical motion, the thirddoing the same for the connector, and the fourth serving to rotatethe arm of the connector into engagement with the line wanted, asalready… … FIG, 510.-TRANSMITTING DEVICE, SIDE VIEW. trie Company, this being somewhat more simple than is the wall set,although its electrical functions are identical therewith. The two sides of the line which, in manual practice, are designatedby such terms as tip and sleeve, or tip and ring, are,…

Telephone

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