Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 660
bon let into a rather heavy socket ofbrass. The face of the carbon buttonpresses lightly on the platinum contactpoint of the first spring. The vibrationsof the diaphragm cause the pressure ofthe platinum point on the carbon buttonto vary, resulting in a variation of theresistance at the contact.… … Fig. 10. Blake transmitter. I), Dia-phragm ; B, rubber band; C, clip ;A, damper ; L, iron bracket; F,adjusting-screw. 648 TELEPHONY.
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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