Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 606
bsolete, and the code for the single-needleinstrument, which was devised by Wheatstone and Cooke, has been inmost cases superseded by one corresponding with the Morse code, a deflec-tion to the right representing a dot, and a deflection to the left a dash. 554 THE ELECTRIC TELEGRAPH. The smaller… … Fig. 282.—The Dozible-Needle histruvieiit. Cooke. It was simply a clock alarum, put in motion by a wound-up spring.The spring was released at the proper moment by a detent, which wasremoved by the attraction of a soft iron armature to the core of a smallelectro-magnet, formed by the line wire…
Inventions
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