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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 362

An illustration from American telephone practice, 1905, leaf 362
e not, however,prevented such systems from being successful in practice. The line and cord circuits of the North Electric Company, ofCleveland, Ohio, is shown in Fig. 277. The arrangement of theline relay in this circuit is not unlike that of the Sterling circuitjust described, this relay having a… … FIG. 277.-NORTH ELECTRIC COMPANYS MULTIPLE SWITCH-BOARD CIRCUIT. The third contact on the jack is wired through the coil of a cut-offrelay to ground, the arrangement in this case beig similar to that THE COMMON BATTERY MULTIPLE SWITCH-BOARD. 341 employed by the Western Electric circuit. The cut-off…

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