Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 484
are, therefore, entirely mechanical in their operation, andare so arranged as to make a certain distinctive noise when a coinis deposited in the proper manner. This noise is transmitted to thehead receiver of the operator at the central office through the trans-mitter at the subscribers station in… … FIG. 338.—BAIED COIN-COLLECTING DEVICE. side view of this is shown in Fig. 338. The box proper is of castiron, provided on its lower front face with a door for allowing accessto the coin box. Three slots appear in the upper front face of thebox for the reception of 5, 10 and 2S-cent coins,…
Telephone
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
