Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 85
pany, and in Fig. 48 a de-tail of the working parts of this transmitter. This instrument is oneof the most carefully dtesigned and constructed, and gives excellentresults in practice. The front, A, is of cast metal, similar to thatused in the solid back transmitter shown in Figs. 45 and 46, and,… … FIG. 47.-THE KELLOGG TRANSMITTER. a plane it has formed up in its center part a cup, h, which containsthe electrodes and the variable resistance medium. The formationof this cup from a piece of thin sheet aluminum, which, by the re-quirements of its service, must be hard rather than soft, has…
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