American School of Correspondence · Chicago, American school of correspondence · leaf 108
eight of the lap is governed by the num-ber of yards it contains and is measured by the revolutions of thelap roll, the picker being stopped automatically after the requirednumber of yards has been wound. The device, by which this isregulated, is called the knock-off, a diagram of the gearing… … LAP ROLL 9DlA Fig. 45. Diagram of Knock-off Gearing. W, driven by a pin, V, which forms part of the gear. As the lat-ter turns, the dog is brought against the upper end of the knock-off latch, E, moving it out and allowing the drop lever, M, to fall,disengagmg the pinion, S, and the gear, R, and,…
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