GB394144A - Improvements in or relating to change speed and like transmission mechanism - Google Patents

Abstract

394,144. Claw clutches; facilitating changing speed. PULSOMETER ENGINEERING CO., Ltd. and WARREN, R., Nine Elms Iron Works, Reading. July 13, 1932, No. 19823. [Class 80 (ii).] In a claw clutch 14, 15 between the gear box 7 and propeller shaft of a motor vehicle, a balking ring 19 arranged for limited rotation on the driven element 15 has dogs corresponding to those on that element and is surrounded by a two-part friction ring 17 which is encircled by a spring ring 18 and which is caused to rotate with the driving element 14 by reason of slotted arms 16 on the latter engaging projections on the ring 17. The element 14 has a conical part 13 adapted to coact with a fixed brake ring 12 and is moved axially by a fork 21 coupled to a spring-loaded block 26 on an actuating rod 25 coupled to the engine clutch pedal 22. The arrangement is such that the clutch 14, 15 is disengaged after disengagement of the engine clutch and the gear-box shaft 6 is braked. On release of the pedal 22, the brake 12, 13 is released and the member 14 is resiliently advanced towards the member 15, the balking ring preventing engagement of the members 14, 15 until the shaft 6 slightly overruns the propeller shaft, the dogs 14 meanwhile riding smoothly over the plane surface presented by the relatively-displaced dogs of the members 15, 17 under the pressure of a spring 6a. Alternatively, the clutch 14, 15 may be operated independently. The Provisional Specification also states that the balking ring may be operated by free-wheel means instead of frictionally.