GB616020A - Improvements in or relating to clutches - Google Patents

Abstract

616,020. Friction and positive clutches. TARLTON, F. H. Aug. 19, 1946, No. 24683. [Class 80 (ii)] In a friction or otherwise synchronized positive clutch of the kind in which a lug 16, Fig. 1, on the positive clutch operating member 12 engages a longitudinal slot 17 in a barrel 18 and in which balking notches 20, Figs. 2 and 3, are provided in the slot having cam sides coacting with mating faces on the lug, one or both of the coacting surfaces of the notch and lug are resiliently pressed together to avoid backlash and are provided with a fixed abutment which locates them when the cam surfaces are required to be operative. As shown, applied to a double-acting positive clutch having synchronizing friction cones on the barrel 18, the lug is held centrally in the slot 17 by spring means. In one form, a spring 22, Fig. 2, embracing the lug and fitting the slot closely at either end, has faces 23 co-operating with the notches 20. In another embodiment, the notches 20, Fig. 3, are themselves formed on sliding members 24 spring-pressed into engagement with the lug and movable to abut the barrel 18 solidly when the notches are aligned with the sides of the slots. The members 24 are prevented by shoulders 27 from protruding too far into the slot and have chamfered ends to facilitate entry of the lug between them.