Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 614
pins are screwed in at Band D, and thev are so adjusted that while that at B is pressed against the 36 562 THE ELECTRIC TELEGRAPH. projection, E, by the action of the spring, F, when the knob, K, is pressed,contact is broken at B, and established at D. D and E are each providedwith a binding-screw,… … FlG. 7.1 -Morse Traiisinittincr Plate. tacts into the apparatus. When the knob is pressed down the battery cur-rent enters the lever by the contact at D, and passes into the line from thefulcrum, c. The clerks who are called upon to transmit messages usuallysoon learn to time the contacts very…
Inventions
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