GB438396A - Automatic clutch - Google Patents

Abstract

438,396. Friction clutches. DEHN, F. B., 103, Kingsway, London.-(Borg & Beck Co. ; 6558, South Menard Avenue, Chicago, U.S.A.) Nov. 23, 1934, No. 33772. [Class 80 (ii)] A centrifugal friction clutch comprises a driven disc 13 which is spring- connected to its hub 15 and disposed between a driving flywheel 11 and a presser plate 12 rotating with the flywheel. Centrifugal weights 37 have feet, the rounded heels 41 of which pivot against the angle of the cover plate 21 secured to the flywheel and the toes 39 of which engage between the plate 21 and a plate 33, which latter is urged towards the former by springs 42. These springs act between the plate 33 and adjustable nuts 44 on studs 45, the heads of which abut against the outside of the plate 21. The nuts 44 are slidable in apertures in the plate 12. Pressure springs 34 and 46 act between the plates 12 and 33, the springs 46 being arranged around studs 47 which are secured to the plate 12 and the adjustable heads 48 of which engage behind the plate 33 so as to maintain the springs 34 and 46 under a predetermined stress. At a predetermined speed, the weights act to move the plates 33 and 12 to the left as a unit to produce initial engagement of the clutch. As the speed increases, the plate 33 moves away from the heads 48 and full engagement under the pressure of the springs 34 and 46 results. The cover plate limits the outward movement of the weights. Manual disengagement can be effected through radial levers 28. U.S.A. Specifications 1,931,674 and 1,931,675 are referred to.