Abstract: A combination coupling and sheave in a variable speed belt drive in which a variable pitch sheave has a fixed flange, an axially shiftable flange and a shaft connected to the drive motor by a flexible coupling with the hubs thereof secured to the motor and sheave shaft. The inventive concept includes mounting the coupling hub on the sheave shaft in a bearing of a pillow block at the end of the shaft and connecting the fixed flange of the sheave to the hub, so that the fixed flange is driven directly by the hub rather than solely by the shaft, and the slidable flange is driven through the shaft, thus creating split power paths between the flexible coupling and the fixed flange and between the coupling and the slidable flange through the sheave shaft, thereby reducing the load on the operating parts of the sheave.

Abstract: A power transmitting device for a bicycle in the form of a crank which is mounted within a hub housing fixedly secured within the frame of a bicycle. A shaft is rotatably supported within the hub housing with a crank arm being attached to each end of the shaft through a spline connection. A sprocket wheel is mounted between one of the crank arms and the hub housing. The sprocket wheel is fixedly secured to this crank arm.

Abstract: Operator access to the zone at which workpieces are struck in a drop hammer is temporarily but reliably blocked by a sturdy mechanical guard throughout every period when the hammer may commence and complete its fall; a unique physical linkage, between the guard and a safety-dog lever which must be manually turned in order to release the hammer, insures that the safety guard must have been shifted from an out-of-the-way position into a protective orientation before the hammer can drop.

Abstract: A tool turret according to the invention comprises a turret head which is shiftable between a rotational position and a working position, drive means adapted to rotate the turret head in the rotational position and being in permanent engagement with the turret head, fixation means for locking the turret head in the working position, and a transducer sensing the position of the turret head.The turret head is rotatable with respect to a non-rotary body which is axially displaceable with the turret head and which has a circumferential projection serving as a piston and being mounted axially displaceable in an annular recess serving as a cylinder and formed in a seat, receiving the body, of a member supporting the body. The projection and the annular recess cooperate with each other to ensure axial displacement of the body with the turret head between the rotational position and the working position.

Abstract: Disclosed is a reduction gear assembly for automatically accommodating varying load conditions on a driven member, comprising a rotatably mounted, axially displaceable first shaft; a drive engagement driving the first shaft by a frictional force engaging in the axial direction of the shaft; a driving element mounted for rotation with the first shaft; and a driven member rotatably driven by the driving element and being subjected to varying load conditions, wherein the driving element comprises means for controlling the axial movement of the first shaft in response to the varying load conditions on the driven member. Also disclosed is a camera embodying the reducing gear assembly as part of an automatic film advance system.