Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 42
te, B, both of which are securely mountedin a case formed by the block, D, and a mouthpiece, F, is a chamberfilled with fine granules of carbon, C. The diaphragm. A, and theplate, B, form the terminals of the transmitter, and the current fromthe battery must therefore flow through the mass of… … FIG, 20.-HUNNINGS GRANULAR CARBON TRANSMITTER. ance offered by them to the current is thus varied, and the desiredundulations in the current produced. This transmitter, instead ofhaving one or a few points of variable contact, is seen to have amultitude of them. It can carry a larger current…
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