American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 354
e air (to an extentdepending upon the speed) and thusretard the speed of the clock-work. The speed at which the clock-workmay run is regulated by the position ofdisc D^ with regard to discs d and d^ andthis position is adjusted by the movementof the bearings bb of the disc d^, from theoutside of…
Telegraph
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