Abstract: An oscillatory rotating engine has a pair of rotors each defining a pair of diametrically opposed radially extending lobes, the rotors are mounted for rotation within a cylindrical housing and sealingly engage the walls of the cylindrical housing to define four working chambers. Each rotor is drivingly connected to an output shaft by means of an internal/external gear train, the external gear being mounted for rotation with the rotor and the internal gear being mounted rotatably with respect to the output shaft for orbital motion in mesh with the external gear. Each internal gear has an arm with a longitudinal slot which is engaged by a pivotal block which will act to rotationally restrain the internal gear and impose a periodic variation in velocity on the gear train, this periodic variation in velocity for the two rotors being out of phase so that the working chambers are alternately expanded and reduced in volume.

Abstract: A belt drive has a pair of pulleys mounted for rotation in a common plane about parallel axes and a belt drivingly mounted about said pulleys, said belt being formed as a band of material having a curved transverse section.

Abstract: A balancer has a ferromagnetic weight mounted for rotation about an axis, the center of mass of the weight is offset from the axis of rotation and a series of angularly spaced coils are provided concentrically about the axis of rotation and spaced radially of the weight. A switching device is provided for sequential energization of the coils so that the magnetic field generated by each coil will cause the weight to rotate, energization of the coils being synchronized so that rotation of the weight will produce an appropriate balancing motion.

Abstract: A drive mechanism includes an internal gear rotatably mounted on an eccentric, the eccentric being mounted on a drive shaft for rotation therewith, said internal gear having an arm with an elongate slot, a block being pivotally mounted on a pin slidably located in the slot, an external gear being rotatably mounted coaxially of the internal gear and in mesh therewith, the position of the pin being adjustable relative to the axis of the drive shaft.

Abstract: A vehicle suspension system includes a roll frame pivotally mounted transverse of the vehicle, the roll frame has an arm at either end, the arms extending longitudinally of the vehicle, a wishbone is pivottaly supported on each of the arms outboard thereof, each wishbone forming part of a linkage for supporting a different wheel of the vehicle.

Abstract: A piston for a reciprocating machine includes a split piston ring which is located in a circumferential groove in the cylindrical wall of the piston. The piston is adapted to be located in a cylindrical bore so that the piston ring sealingly engages the bore with a gap between its ends, the gap being fully underlaid and sealed by a contiguous unbroken annular supporting ring, a spring being provided to maintain the ends of the piston ring in engagement with the supporting ring.

Abstract: A mechanism for transmitting torque from one shaft to another shaft includes a formation attached to one shaft, the formation defining a plurality of cylindrical surfaces each having radius R, the axes of the cylindrical surfaces being parallel and disposed at angularly spaced locations about a circle of radius M, each cylindrical surface is engaged by a cylindrical bearing formation attached to the other shaft, each bearing formation having a radius r and being disposed in similar angular relationship to the cylindrical surfaces about a circle of axis inclined at angle to the axes of the cylindrical surfaces, the radius of the circle upon which the bearing formations are disposed being equal to M/(1+cos) and the radius R of the cylindrical surfaces being equal to r+M(1-cos)/(1+cos).

Abstract: A hydraulic device has an inner rotor of cylindrical section mounted eccentrically within an outer rotor of tubular section. Angularly spaced axially extending ribs of part-circular cross-section are provided on the inner rotor and correspondingly spaced axial recesses of part-circular cross-section are provided on the opposed surface of the outer rotor, the ribs meshing with the recesses over an arcuate working zone in which a plurality of adjacent ribs engage corresponding recesses, the ribs moving relative to but in engagement with the recesses as they progress through the working zone. A baffle is located between the rotors to provide a seal therebetween outside the working zone and an inlet port is provided to the working zone adjacent the termination thereof relative to the direction of rotation of the rotors while an outlet port is provided adjacent the center of the working zone, the inlet and outlet ports being separated by at least the pitch of the ribs on the rotor.

Abstract: A valve stem which is located for axial movement; a valve lever is pivotally mounted at one end and is attached adjacent the other end to the end of the valve stem, the valve lever defines a track; a drive pin engages in the track the drive pin being mounted at one end of a first link the other end of the link being pivotally mounted about a fixed pivot, a second link is pivotally mounted at one end about moveable pivot, the first and second links being interconnected by an intermediate link pivotally attached to said first and second links at positions separated from their pivots, a drive link is pivotally connected at one end to the pivotal connection between the second link and intermediate link and at the other end to a crank, so that rotation of the crank will cause the linkage to oscillate and the drive pin to perform a reciprocating motion along an arcuate path; the trank has a first portion which is engaged by the drive pin when the valve is closed and coincides with the arcuate path of the drive pin

Abstract: A continuously variable transmission system includes an input assembly having a first member connected to an input shaft, the first member being of cylindrical formation and having a pair of axially separated inwardly directed flange formations. The opposed faces of flange formations are conical and are inclined inwardly away from one another. A second member is mounted in fixed rotational relationship but movable axially of the first member. The second member has an inwardly directed flange formation with oppositely inclined conical faces. The first and second members thereby define a pair of inwardly directed annular grooves the walls of which diverge inwardly. First and second annular discs are mounted for rotation about axes parallel to but eccentric of the axis of rotation of the input assembly, so that each disc engages in a different one of the grooves. Each disc engages the opposed conical walls of its associated groove so that drive is transmitted from the input assembly to each of the discs.

Abstract: A mechanism for transmitting rotational motion from an input shaft to an output shaft includes a link which is constrained to move about an orbital path, the input shaft being coupled to the link so that rotation thereof will drive the link about its orbital path, and the output shaft being coupled to the link so that orbital motion of the link will cause the output shaft to rotate.

Abstract: A continuously variable transmission unit includes a disc drivingly connected to a first shaft, said disc having a frusto-conical groove in its outer periphery, the walls of the groove being inclined inwardly towards one another; an annular element is mounted for rotation about the disc, so that the inner periphery of the annular element is located within the groove, opposite faces of the annular element engaging the opposed walls of the groove. A connection is provided for transmitting rotation of the annular element to an output shaft and the annular element is mounted for rotation on a carrier, the carrier being adjustable radially of the disc to alter the eccentricity of the annular element with respect to the disc and house the drive ratio of the transmission. The transmission unit may drive suitable gear trains to extend the range of drive ratios thereof. Positive drive elements may be included between the disc and annular element.

Abstract: An internal combustion engine includes a piston slidingly sealed and constrained to move along a linear path in a cylinder, the piston having a rigid connecting rod which extends axially of the cylinder, a link constrained to move in an orbital path in a plane parallel to the axis of the cylinder is coupled to the connecting rod by means of a crank shaft rotatably mounted on the link, the crank shaft having a first crank pin which is pivotally connected to the connecting rod, the first crank pin being constrained to move in a linear path as the link moves about its orbital path and the crank shaft rotates relative to the link, so that linear movement of the piston will drive the link about its orbital path, a drive shaft being coupled to the link so that orbital movement of the link will cause the drive shaft to rotate.

Abstract: A piston has a head portion and a skirt formation, a gudgeon pin by which the piston may be pivotally connected to a connecting rod is supported transversely of the skirt formation, the skirt formation is defined by a pair of part cylindrical skirt portions, the gudgeon pin connecting the skirt portions together and interengaging formations are provided on the head portion and skirt portions to locate the skirt portions axially with respect to the head portion.

Abstract: A mechanism for transmitting rotational motion from one shaft to another includes a link which is constrained to move in an orbital path, an input shaft is connected to the link so that rotation of the input shaft will cause the link to move in its orbital path and a second shaft parallel to the input shaft is connected to the link so that orbital motion of the link will cause the second shaft to rotate. At least one of the shafts is connected to the link by a mounting which is capable of movement in the plane of the link, said mounting making frictional engagement with the link so that when a lateral stress above a predetermined value is applied between the shaft and link, the mounting will move laterally to relieve the stress, said predetermined value being above the lateral stresses experienced during normal operation of the mechanism.

Abstract: A linear actuator has a screw threaded shaft mounted so that it is restrained from rotational movement, a cage is mounted in sliding relationship on the shaft and an internally threaded member is mounted at one end of the cage in a spherical bearing. The threadform of the internally threaded member is similar to that of the shaft but of larger diameter. The internally threaded member has a skirt formation which extends towards the other end of the cage, a circumferential portion of the skirt formation being made of ferromagnetic material.

Abstract: An internal combustion engine includes a piston mounted for reciprocating motion within a cylinder and sealed with respect thereto. The piston is connected to a crankshaft by means of a connecting rod, pivotal connections being provided between the connecting rod and crankshaft and between the connecting rod and piston. An oil ring is provided in a circumferential groove in the wall of the piston, said oil ring being split so that there is a gap in the ring when it engages the wall of the cylinder. An interconnection is provided between the connecting rod and oil ring by which tilting of the connecting rod upon upward movement of the piston will reduce the gap so that the load applied by the oil ring on the cylinder wall is reduced, the oil ring being permitted to expand against the cylinder wall upon downward movement of the piston.

Abstract: A two stroke engine has a closed plane cylinder with an inlet port and outlet port disposed on opposite sides of the cylinder towards the open end thereof. A piston is slidingly sealed in the cylinder the piston having a head portion which is slidingly sealed with the wall of the cylinder and a connecting rod portion which extends axially from the head portion. The end of the connecting rod portion remote from the head portion is connected to a crank on a crankshaft, the ports being disposed one on each side of the vertical axial plane of the crankshaft so that; upon downward movement the piston will tilt, opening the exhaust port before the inlet port and; upon upward movement the piston will tilt closing the exhaust port before the inlet port, the throw of the crank producing a maximum piston tilt of up to 10.degree.. A multi-cylinder engine may comprise a plurality of piston/cylinder assemblies described above, disposed radially of one another about a common crankshaft.

Abstract: A continuously variable transmission unit includes a disc drivingly connected to a first shaft, the disc having a frusto-conical groove in its outer periphery, the walls of the groove being inclined inwardly towards one another; an annular element is mounted for rotation about the disc, so that the inner periphery of the annular element is located within the groove, opposite faces of the annular element engaging the opposed walls of the groove. A connection is provided for transmitting rotation of the annular element to an output shaft and the annular element is mounted for rotation on a carrier, the carrier being adjustable radially of the disc to alter the eccentricity of the annular element with respect to the disc and to change the drive ratio of the transmission. The transmission unit may drive suitable gear trains to extend the range of drive ratios thereof. Positive drive elements may be included between the disc and annular element.

Abstract: An internal combustion engine includes a beam mounted on a central pivot, at least two pistons are each slidably located in a cylinder to act on an opposite end of the beam, said beam defining a cradle, a bearing is mounted within the cradle upon a pair of trunnions about which the bearing may pivot, the pivot axis of the bearing being at right angles to the pivot axis of the beam, these pivot axes lying within a common plane which is transverse to the axes of the cylinders, a crank shaft with angled crank pil-0s mounted for rotation about an axis which extends longitudinally of the cylinders and passes through the point of intersection of the pivot axes of the bearing and beam, the crank pin being located in the bearing.