Abstract: A sprocket shift assembly wherein sprockets of different diameters are arranged as a cluster on a common shaft and are coupled with a chain between driving and driven members. The chain is movable as the sprockets rotate from one of the sprockets to another by realignment of portions of the sprocket such that the chain is at all times in a positive driving relationship with the cluster.

Abstract: A multiple crown free wheel system for bicycles comprises a core having a cylindrical external surface of generally constant diameter in which there are a series of canals. Each crown is provided with a series of ribs in its inner periphery, complementary to the canals of the core and in the same number, so that the crowns may be assembled and keyed on the core by sliding them axially onto the core, one after the other. A flange standing up from the surface of the core coincident with the annular salient of its rear mouth serves as a penetration block for the various crowns. Each crown increases uniformly in cross-sectional thickness from a zone beneath the base of the teeth to a maximum thickness.

Abstract: A motor mount having novel means for maintaining the belt from the motor to the driven instrumentality in constant undeviated alinement notwithstanding that a variable pitch pulley is used, of which one flange is axially slidable and the other flange is nonslidable, but wherewith relative lateral displacement between the pulley flanges and belt is compensated for simultaneously with the varying of the pitch diameter of engagement of the belt with said flanges.

Abstract: A multi-speed freewheel for a bicycle, whose outer assembly is formed in a cylindrical shape and a plurality of sprockets to be attached to the outer assembly are previously integrated into a sprocket-block so that the sprocket-block may be detachably mounted on the outer periphery of the outer assembly.

Abstract: The apparatus of the present invention may comprise a housing or other stationary member which may have a chamber therein. A drive member is disposed in the chamber for movement therein. An elongate torque transmission member is rotatably mounted in the housing so as to extend into the chamber toward the drive member. Means are provided to prevent the torque transmission member from moving longitudinally with respect to the housing. An annular connector is disposed between the torque transmission member and the drive member. The connector is connected to the torque transmission member for longitudinal but non-rotating relative movement and threadedly connected to the drive member. Thus the connector can be moved longitudinally along the torque transmission member during normal or automatic operation of the actuator.

Abstract: A V belt pulley clutch assembly for a variable speed transmission which may be either the driving or the driven pulley, and which has one movable sheave which is both speed and torque responsive, and wherein the torque responsive portions comprise raised spiral ramps on the hub of the movable portion of the V belt pulley driven through saddle type members riding on the spiral ribs. The ribs are spiraled axially along the hub of the movable portion of the V belt pulley in a direction so that when the driven member is subjected to more load the unit tends to shift into a lower drive ratio. That is when the drive clutch assembly is powered from a drive shaft, the spirals are arranged so that the pulley halves tend to separate under increasing load on the belt. The ribs are on the external surface of a hub and can be die cast draft free for permitting driving and sliding between two relatively movable pulley halves.

Abstract: A driving apparatus which includes a driving and driven belt pulleys at least one of which is constructed to change the effective diameter thereof, in response to the rotational speed of a driving power source. An endless v-belt serves as the driving connection between the driving and driven pulleys. The belt pulley with a changeable effective diameter has a first fixed pulley plate, a second slidable pulley plate and at least one weight operated by the centrifugal force acting thereon. The weight serves to shift the second pulley plate relative to the first pulley plate thereby to change the effective diameter of an annular groove defined between the first and second pulley plates with the increase of the centrifugal force. Therefore, the speed ratio of a driven unit to the driving power source is varied in response to the speed of the driving power source.

Abstract: A rotary motion transmitting device having oppositely disposed toric discs mounted on its input and output shafts. Motion transmitting rollers are frictionally engaged between the toric discs for transmitting motion from one toric element to the other and tension sheets extend between opposite rollers to balance forces exerted on the rollers. Pivotal roller supports are interconnected by correlating means which point limited independent pivotal movement of the roller supports while resiliently forcing the supports into the same angular positions. Also means are provided for controlling the transmission ratio such that the output torque assumes a desired value.