Inside Out Library · Explore

American telephone practice (1905)

Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 89

An illustration from American telephone practice, 1905, leaf 89
FIG. 51.—THE COLVIN TRANSMITTER. this stud in this bushing the adjustment of the transmitter electrodesmay be efifected. A machine screw, K, passing through a washeras shown, serves to engage a tapped hole in the end of the stud, F,and thus bind the latter in place in the rubber bushing, /. This…

Telephone

Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.

More pictures from American telephone practice

More like this