GB205184A - Improvements in or relating to clutch and speed controlling devices - Google Patents

Abstract

205,184. Wade, H., (Universal Winding Co.). July 11, 1922. Clutches, claw; variable-speed gearing. - In positive clutch mechanism with slipping means allowing progressive variation of speed between the driving and driven members, one member is provided with a number of spring rings, which expand into constant frictional engagement therewith and can be successively and cumulatively brought into positive clutching-engagement with the other member. A driving or driven sprocket, gear wheel, pulley, or other element 5 is free on a driven or driving shaft 6, which is mounted in a bearing 7 and carries rigidly a clutch member 17 with a rim 21. Expanding rings 25 are received in grooves 24 in the rim and extend around substantially three-quarters of their circumference, one end of each being radially inturned to form a finger 26. One or more pins 27, carried by a slidable member 28, pass through the web 9 of the pulley &c. 5 and engage behind the fingers 26 of successive rings 25, thus progressively reducing the slip to zero. The member 28 is actuated by a manual or automatic lever 35. As shown in Fig. 3, the pins have bevelled ends 38 to facilitate engagement, and the rings trail behind their inturned ends 26. For heavier loads, the last ring, or any or all of them, may lead the fingers 26, whereby drive augments the grip; final engegement may be with a pin or lug 40 on the part 17. Disengagement. is also progressive, but may be made sudden by rapid movement of the lever 35 and application of a brake (not shown).