GB423454A - Transmission and change-speed mechanism - Google Patents

Abstract

423,454. Controlling change speed gearing. RILEY, P., c/o Riley Engine Co., Aldbourne Road, Coventry. Oct. 12, 1933, No. 28190. [Class 80 (ii)] Transmission mechanism suitable for motor vehicles comprises a pedal-controlled main friction clutch 12, Fig. 1, and a change-speed gear in two portions A and B, the portion B remote from the clutch being an " easy-change " device connected so as to be actuated mechanically by the clutch pedal 30. The change-speed gearing shown has three pairs of constant-mesh gears and yields four speeds corresponding to the changes two and two of four clutches, 19, 20, and a coupled pair 23. In the form shown, the easy-change character is derived from the two clutches 23 being frictional. In a form shown in Fig. 1, of Specification 423,455, the easy change character is derived from a tail or isolating oneway clutch 46. The clutches 19, 20, Fig. 1, of the portion A are operated in unison by integral forks 41, Fig. 2, sliding on a fixed guide which also supports a fork 40 operating the clutch pair 23. The forks 41 are connected so as to be shifted completely by moving a hand lever 39 in the plane of Fig. 2. The fork 40 is moved from the pedal 30 after a selector movement of the hand lever 39 in the plane of Fig. 3. The pedal 30 is geared to a pair of opposite cranks 34 connected to slide two bars 35 in opposite directions. When the pedal 30 is in the depressed position of Fig. 2, two notches 36 in the bars 35 are in line. The lever 39 can then be moved in the plane of Fig. 3 to bring a stem 37 into engagement with one or other of the notches 36. On release of the pedal 30, the stem 37 is carried one way or the other according to which rod 35 is engaged. The fork 40 and clutch pair 23 are thus moved one way or the other on release of the pedal according to the selective setting of the lever 39. Specification 405,429 also is referred to.