Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 439
L carrying a soft-iron armature, which is held a little distance from the poles by the spring S. Platinum contact points, P, are connected with the lever L and the screw G. The ends of the wire of the electromagnet are connected with the binding posts B, B, and the lever L and the screw G are… … Fia. 519.—Telegraph relay. INSTRUMENTS IN A TELEGRAPH SYSTEM 429 511. Connection of Instruments in a Telegraph System. Fig. 520 shows a telegrapli hue passing through three offices
Physics
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