Submarine telegraphs; their history, construction, and working. Founded in part on Wèunschendorff's 'Traitâe de tâelegraphie sous-marine' and compiled from authoritative and exclusive sources (1898)
Bright, Charles, 1863-1937 · London, C. Lockwood and son · leaf 709
SIGNALLING APPARATUS. 589 the local battery / and the Morse receiver R. A small condenser C is sometimes inserted between the terminals of this receiver to diminish the sparking between the armature a b and the stop i\ caused by the " extra current." To change to the sending position the switch i… … Fig. 48. Xo. 3, which cuts the relay I3 out of circuit, substituting for it the current reverser K and the sending key D. The former of these is worked by the local battery/, when D is depressed ; the armature L being pulled down by the electro-magnet m', breaks the contact between the lever f^ ;…
Cables, Submarine
Internet Archive · Northeastern University, Snell Library · Public domain (published before 1931). Free to use for anything.
