merit of reproducing the voice sidered quite sensitive. Having traced the very distinctly and with a naturalness of circuit through the platinum, spring, and tone and amount of volume that is surpris- carbon button, where the spring holding ing. the latter comes in contact with the iron For these… … in diameter than the diaphragm, is For above purpose (according to the E. Carbon button spring. ab. Secondary wires. cd. Primary wires. formed-.in the iron ring. On this process just patented in France and seat the diaphragm rests. A short, England by C. Delerue, of Roubaix, THE BLAKE TRANSMITTER.…
Internet Archive · Public domain (published before 1931). Free to use for anything.
