Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 764
so as to occupy a position under thepin, p, carried on the pawl, thus holding it out of engagement withthe ratchet-wheel until the rotation of the lever is nearly completed.At this point a cam on the under side of the ratchet-wheel pushesthe dog, /, out of engagement with the pin, p, and thus… … FIG. 526.-HOLTZEE-CABOT DESK SET. mechanism is well constructed, all of the parts subject to wear beingof hardened steel. The diagram of circuits given in Fig. 525 shows a system of wiringfor four stations equipped with this automatic return switch, thissystem being operated with the common calling…
Telephone
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