GB249931A - Improvements in or relating to clutches for conveying rotary motion - Google Patents

Abstract

249,931. Edwards, C. K., and Associated Equipment Co., Ltd. Jan. 3, 1925. Dashpots.-The engaging movement of a friction clutch element is damped by so fitting it piston-wise in a housing provided with non-return valves and leak passages as to induce dash-pot action. The intermediate disc 27 of a plate clutch is rigid with a shaft 28 having a splined connection 29 with a driven shaft (not shown), the driving-shaft 10 carrying a flywheel in two parts 13, 17 bolted together to form a casing. The two parts are respectively provided with a machined surface 19 and a boss 20, forming an annular chamber in which the presserplate 21 slides under the action of engaging-springs 52 disengaging levers 42. The parts 20, 21 are provided with sealing-rings 23, 22 and the flywheel part 17 with non-return air valves 24 having small leak passages 25, so that the plate 21 may move freely to the declutched position, shown in Fig. 3, while its movement to the clutched position, shown in Fig. 2, is damped. Dash-pot control may be alternatively or additionally applied to the backing-member 31, which is preferably also under the control of springs. The annular member 31 slides between the surface 19 and the periphery of a ring 14 carried by the flywheel part 13, there being provided sealing- rings 32, 33 and non-return valves 34 with leak passages 35. The movement, of the member 31 to the left is cushioned by air compressed between it and the part 13 ana also Dy adjustable springs 53, Fig. 4, which act on the member 31 through shouldered studs 56 and may be arranged to come into action successively.