Abstract: In a rotary drum mixing machine of the kind in which the drum is rotated in opposite directions to mix and eject its contents respectively by a prime-mover operating through driving and driven means on a prime-mover driven shaft and the closed end of the drum respectively, reversal of the direction of rotation of the drum can be effected without reversing the prime-mover by a pivotally mounted pair of gear wheels which are continuously driven in opposite directions by the prime-mover and are alternately movable into operative engagement with the driving means for the drum.

Abstract: A particularly compact and efficient transmission includes one or more helix-like races having a common axis of rotation, a support member extending along the axis, one or more bearing units axially fixed to the support member and with their peripheries positioned in rolling engagement with the races, and means for rotating the bearing units about the axis whereby the bearing units roll along the races and the support member advances along the axis. Each bearing unit includes a hub, a circular array of roller means located radially outward from the hub, and resilient means for rotatively connecting each roller to the hub so that each roller is stiff in the circumferential directions around the array, but relatively elastic in planes which include said axis hub. When the transmission is under load, the roller means deflect laterally as needed to achieve uniform contact between all roller means and their respective race walls so that the load is distributed uniformly among all of the bearing units.

Abstract: A improved planetary drive employs a pair of radially inner and outer nonorbiting members between which is radially disposed an annular orbiting member. The inner nonorbiting member and the inner surface of the inner wall of the orbiting member are formed with opposing surface in meshing engagement to form one stage of a planetary drive, while the opposing surfaces of the outer nonorbiting member and the orbiting member are formed with teeth in meshing engagement to form a second stage of a planetary drive. All of the orbiting and nonorbiting members and their teeth lie in the same plane or planes disposed radially outward from the means for orbiting the orbiting member so that when that member is orbited, the forces exerted on the orbiting means are in said plane or planes. Various combinations of rollers and lobed surfaces to formed the gear stages are also described.

Abstract: The feed system of a coal getting combine, which works with a face conveyor, comprises: a traction device located on the combine and having a cylinder-shaped sprocket on the side surface of which a circular spherical-shaped recess is provided, slots being made on both inner sides of the spherical recess, said slots having an involute-spherical surface. Arranged lengthwise of the conveyor is a longitudinally traversable guide bar secured at the ends of the conveyor and composed of a number of separate tubular sections articulated together and provided with open-end holes arranged square with the longitudinal axis of said holes.

Abstract: A zero-backlash anti-friction nut construction for engagement with the threads of a screw. The device comprises a pair of nut sections having aligned through bores to receive the screw, pairs of rollers respectively carried by the sections and having generally conical tip portions engageable with the walls of the screw grooves, and bearings mounting each roller for rotation about its respective axis during such engagement. The rollers have Belleville springs urging them radially inward, and in addition, a coil spring carried by one of the sections biases the two toward one another against the action of the Belleville springs, so as to minimize looseness with the screw. The arrangement is such that the coil spring loads the nut sections sufficiently to effect slight retraction of each roller against the action of its Belleville springs. Improved performance and lowbacklash tracking of the nut sections along the screw thereby result.

Abstract: A stator-rotor assembly wherein rollers are used to form the internal teeth of the stator. The rotor has one less tooth than the stator and cooperates in gear relationship with the internal teeth of the stator. The stator has a plurality of cylindrically shaped pockets each containing a cylindrical roller. Each pocket is covered with a crushable porous coating to a thickness of X units. The radius of the pocket is R units and the radius of the rollers is equal to or greater than R-X units and less than R units. Each roller crushes the coating at spaced locations to trap fluid between the rollers and the pocket. The rotor has an average diameter that interferes with the tangent circle of the stator-roller assembly.

Abstract: A composite gear device having a large toothed wheel and a smaller toothed wheel axially offset with respect to each other. A link chain is provided having the same number of tooth engaging openings as the number of teeth on the larger toothed wheel. The chain is secured to the large toothed wheel, preferably by straining it within its elastic limit, so that the chain engages the teeth in an essentially nonflexible configuration free of any articulative movement. The smaller toothed wheel also engages the chain thus allowing the transmission of power in essentially an axial direction.

Abstract: Gear drive, more particularly a gear drive for a rotary printing press, wherein there are gear couples each consisting of a male gear, and a female gear, the male gear having rollers instead of teeth, such rollers being seated in sockets, the female gear having sockets which are complementary to the rollers; the rollers being mounted in side plates and by such means that they are held firmly (but resiliently) against the bottoms of their sockets. An alternative design employs sprockets with a roller chain drive.

Abstract: This invention pertains to tooth transmission members in which the tooth member is mounted to a support member and the tooth or pocket is used to drive or be driven by roller chains and the like. A base member is provided and is usually a form blank such as a disc or length of metal to which is secured assembled preforms in a linked array. Each preform provides a roller receiving tooth profile. The linked preforms are tightly retained on the previously prepared base members. Any selected number of preforms may be used and at least one is secured to the support blank upon which they are mounted. The support blank may be regularly or irregularly shaped depending upon the desired resulting transmission member.