GB190507796A - Improvements in Variable-speed Gearing applicable to Cycles, Motor Cars and the like - Google Patents

Abstract

7796. Saunders, M. April 12. Motor road vehicles.-In a three-speed gear for motor - vehicles, the extreme speeds are produced by the independent action of separate epicyclic trains. In Fig. 1, an arrangement is shown with a gearing down" train on the leftand a "gearing up" train on the right, but a modification is described in which the clutch actuating- rod 22 is positively operated by a lever pivoted to a projection from a washer 31. A sprocket-wheel 1 is secured to a sleeve 2 carrying an internally-toothed wheel 3. Planet pinions 4, mounted on spindles 7 carried by a ring 8, are in mesh with a toothed sleeve 5 upon a fixed axle 6. The ring 8 is connected through a cylinder 9 with a ring 8<a>, which carries pinions 4<a> upon spindles 7<a>, these pinions being in mesh with an internally-toothed ring 3<a> upon the hub &c. 10 and with a toothed sleeve 5<a>, which may be overrun by the element 3<a> through a oneway clutch 11. The sleeve 5 is secured to a cylinder 12 provided with longitudinal slots in which engage projections on a sliding cylinder 13. The cylinder 13 is provided with ratchet teeth 14, which are held by a spring 15 against teeth 14<a> in the ring 8<a>, and with ratchet teeth 17 adapted to engage teeth 18 on a sliding non-rotable stop 19, which also carries ratchet teeth 21 adapted to engage teeth 21<a> on the sleeve 5<a>. The stop 19 may be traversed by means of a pin 27 projecting from a rod 22 in the axle 6, a chain &c. 23, and a spring 26. In the position of the stop 19 shown, the teeth 21 serve to stop the sleeve 5<a>, and the teeth 14 serve to clutch the sleeve 5 to the ring 4. The train on the left runs solid, and the pinions 4<a> rolling on the sleeve 5<a> impart an increased speed to the ring 3<a>. If the stop 19 is drawn to the left to disengage the teeth 21, the clutch 11 comes into action and the whole gear rotates solid. A movement of the stop 19, sufficient to cause the engagement of the teeth 18 and the disengagement of the teeth 14, locks the sleeve 5 against rotation and effects a drive at diminished speed through the cylinder 9 and the solidly-rotating train on the right.