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American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 32

An illustration from American telephone practice, 1905, leaf 32
hrough a hole in the edge of the diaphragm,and engaged with a threaded hole in the edge of the tube, for thepurpose of attaching the diaphragm while in transit, to prevent itfrom getting lost. No one, however, notified Sir William of this, itprobably having been forgotten; and Sir William seems to… … riG. I2.-ROYAL E. HOUSES ELECTRO-PHONETIC TELEGRAPH. tentionally, bent upward, as the picture shows. But when so bent,being at the same time rigidly fastened at the opposite edge, it wouldnot and could not work: and when Sir William showed it in Englandhe couldnt make it work. Bells instrument, in…

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