Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 77
rinanMay, 1S97. CARBON TRANSMITTER. The heating effects in increase of current in time to do any good carbon are comparatively slow, and it would seem that the changes in temperature would lag slightly behind the changes in current producing them, in such a manner as to be detrimental to telephone… … FIG. 40.—THE BLAKE TRANSMITTER. sistance with changes in surface contact^ all things considered,better than any other known substance, possesses the desirableproperty of lowering its resistance when heated, and is elastic, non-corrosive, non-fusible, cheap, and easily worked. The form of…
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