Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 80
pencil was used. Moreover, the liability ofrattling is greatly reduced. Fig. 42 shows the Turnbull transmitter, which has been used to &8 AMERICAN TELEPHONE PRACTICE. a limited extent in this country, even until recently. In this figure,A is the diaphragm of thin wood, on the back of which is… … FIG. 42.-THE TURNBULL TRANSMITTER. the diaphragm. The rods, b and C, form the terminals of the trans-mitter, and the current passes from one of tkem through the carbonpendants in multiple to the other. The variations in resistanceoccur principally in the contacts between the rod, C, and the…
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