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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 171

An illustration from American telephone practice, 1905, leaf 171
spective binding posts on this rack, thus somewhat sim-plifying the external wiring. Still another arrangement of desk stand wiring is that whereina separate connecting rack without induction coil is used, the in-duction coil being carried in the generator box. The circuit ar-rangement for this or… … v3<z/.- FIG. 126.-SEEIES DESK SET CIRCUIT-COIL IN BELL BOX. the generator and bell being independent of the position of thehook. This was the arrangement of the Carty patent. Severalmodifications of this arrangement are used by different Independentcompanies, these owing their existence either…

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