Abstract: A worm-like drive mechanism has a plurality of axially-spaced eccentrics rotated by an input shaft located at right angles to an output shaft. A wheel mounted on the output shaft has a circumferential surface with periodic undulations. Oscillators in the form of rollers mounted on pins and captured in respective slots of a fixed carrier are reciprocated through contact with the external surfaces of the eccentrics to cause the undulated surfaces of the wheel to move, thereby driving the output shaft. Contact between the rollers and the eccentrics is achieved through the intermediary of bars which are reciprocated with the rollers.

Abstract: A linear wave gear drive has a car with oppsoite walls on which pluralities of apertures carrying reciprocating roller assemblies are arrayed. The car is located between inwardly-facing cam surfaces on a track and a belt housing outwardly-facing cam surfaces is passed through the car, with the assemblies contacting facing ones of the surfaces to move the car linearly in response to lineal movement through the car of the belt. The assemblies preferably have three rollers contrally mounted in axially-spaced locations for free, independent rotation about common shaft pins. The apertures are shaped to accommodate the pins in orientations perpendicular to the directions of movement of the belt and car, and parallel to the apertured car sides. Upper and lower rollers have identical larger diameters than central rollers to capture the belt edge in order to inhibit axial displacement of the pins. Assemblies are eliminated from a usual "one more" or "one less" wave gear construction to provide a stronger car.

Abstract: A drive mechanism has a cam with dual outwardly-facing elliptical cam surfaces axially-spaced across a gap and an arcuate wave gear segment with an inwardly-facing multi-toothed cam track annularly positioned in opposition to the gap. A chain has linked roller assemblies with first and third rollers that ride on the dual cam surfaces and second rollers of larger diameter that ride on the cam track and are held against axial displacement by travel in the gap. A differential exists over the same distance between the number of rollers and the number of teeth of the cam track. The cam surfaces drive the roller assemblies in a travelling wave along the cam track to drive the chain at a reduced speed around the cam. A drive winch assembly has link plates joining the roller assemblies on both sides of each roller to provide improved force distribution from one chain segment to the next.

Abstract: A reciprocating piston machine in the form of a barrel engine has angularly-spaced pistons directly centrally linked by wrist pins to radially extending branches of a spider obliquely journalled for nonrotational nutation on a Z-crank portion of a rotational shaft. The pistons are double-acting pistons providing two piston surfaces per cylinder in rodless connections to a single spider.

Abstract: A bolt shank and washer have contiguous respective elliptical and circular surfaces that interact to impart an undulated axial distortion to the washer in a circumferentially running sinusoidal way, so that the washer acts in spring-like fashion to lock the bolt in its tightened position. The elliptical surface is tapered outwardly toward the bolt head to give an increased spring constant with increased tightening.