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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 582

An illustration from American telephone practice, 1905, leaf 582
the winding being continuous and employing agreater number of conductors than would ordinarily be the case. Itis found that with the slotted armature type of construction, whereinthe conductors are bunched in groups between the teeth of the arma-ture, a sufficiently smooth current cannot be… … FIG. 401.—MAGNETO POWER RINGER. The Holtzer-Cabot Company, of Brookline, Mass., which makesan excellent line of telephone charging and ringing machines, em-ploys diamond-shaped pole faces on their charging machine polepieces, the object of this being to cause the armature conductors toenter into…

Telephone

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