American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 442
oose-ly, on the crank shaft. A break-wheel w is geared with the cog-wheel cw in sucha manner that it receives a tendency to turn in the direction shown by the arrow,but it is normally prevented from turning by the engagement of the pin/ on its sidewith the curved cam k attached to the prolongation… … DISTRICT SERVICE CALL BOX 368 AMERICAN TELEGRAPHY. suitably arranged pawl and ratchet the cog-wheel cw is prevented from movingwhen the crank is pulled down. (A practically similar pawl and ratchet is shown iaFig. 282.) The effect of turning the crank shaft is to wind the recoil spring. Whenthe…
Telegraph
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