American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 333
nter to follow, when unre-stricted, the coil in its movements. But the pointer is not so rigidly attached to thecoil as to check the motion of the latter when the jockey reaches its contact point orback stop. In other words, should the coil, for instance, be deflected to an angle of1° or more, the… … JACOBS DUPLEX. 283 The coil is held, normally, in a central point between the permanent magnets,by the springs p, p. The presence of a current in the coil overcomes this balance, bymagnetizing the core. The local connections of the pointer are so arranged that acurrent in tlie coil will press the…
Telegraph
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