Abstract: In an automotive clutch having a clutch disc clamped between the flywheel and a movable pressure plate held by strong springs anchored on the rotating cover and lifted by action of a throw out bearing movable concentrically of the transmission input shaft to engage the release fingers which lift the pressure plate, and a clutch pedal in the operator's compartment of the vehicle, a linkage for moving the throw out bearing against the release fingers, the linkage including a length adjustable hydraulic fluid filled link and a valve thereon to bleed off a small quantity of the hydraulic fluid when the release fingers bear firmly against the throw out bearing while the linkage is in rest position to relieve pressure on the hydraulic fluid and allow the throw out bearing to move away from the release fingers.

Abstract: An endless standard link chain closed with a quarter- or half-turn twist to increase the contact length by a factor of four or two, respectively, and thus extend its life when used on power drives utilizing sprockets capable of engaging standard link chains.

Abstract: A gear tooth, particularly for internal gears, such as a wobble gear transmission, has its angle of slew defined as a fraction of the radii of the pitch circles of a gear bearing the tooth and a gear adopted to engage with it. The critical factor in calculating the correct profile for a circular-arc gear tooth is (1-cos .theta.) where cos .theta.=r/R and r and R are the radii of the above pitch circles.

Abstract: A coupling arrangement for transmitting torque in a toy model has a Cardan joint whose one end portion is connected with a nut which is screwed on a worm gear mounted on a motor shaft, whereas the other end portion of the same is connected with a driving shaft engaging with a gearing element which is connected with a toy model axle. The nut may be formed as a cap nut and fixed on the worm gear by a counter nut. The gearing element may be formed by a gear wheel, a differential gear or the like. A structural plate may be provided, on which the motor and a structural element supporting the driving shaft can be mounted. The cap nut may have a closed end portion provided with a journal which is connected with one end portion of the Cardan joint.

Abstract: A device which automatically compensates for wear of a motor vehicle clutch by the engagement, during a working stroke of a pawl end of an arm with a tooth of a locking element and subsequent disengagement of the pawl end upon the return stroke of a fork and lever due to the abutment of a stop with the arm, which allows the lever to rotate and carry the locking element out of engagement with the pawl end, a spring biassing the arm and the element together to allow the pawl end to engage a further tooth, if necessary, to compensate for wear prior to the next working stroke.

Abstract: A ball screw nut assembly of the type in which a nut having an internal helical groove is telescoped over a shaft having an opposing helical groove and an endless train of balls is disposed in the grooves so that the nut travels axially along the shaft as the latter is turned relative to the nut. Travel of the nut along the shaft is limited by a stop which is mounted on the shaft and engaged by the nut. As the nut approaches the stop, the balls leave the groove in the shaft and roll on a cylindrical portion of the shaft whereby the nut is no longer positively driven and the force with which the nut impacts the stop is substantially reduced. Return of the balls into the groove on the shaft is aided by making the diameter of the cylindrical portion slightly greater than the root diameter of the shaft grooves and by utilizing a resilient stop.

Abstract: In a torque support arrangement for a gear mounted so as to be movable about a pivot axis, wherein the gear is supported against the base on both sides of the pivot axis by an elastic supporting arrangement, the supporting arrangement includes a pressure-medium piston-cylinder to which pressure gas is admitted and whose position relative to the base is adjustable by means of an adjustment device.

Abstract: A power transmision belt having a plurality of V-belt bodies arranged side by side and driven simultaneously by one pulley. The entire surface of each V-belt is covered with a rubbered bias fabric. The upper surfaces of the V-belt bodies are connected with a single ply or plural plies of rubbered stretchable fabric.

Abstract: A raw edge type endless power transmission V-belt having a first rubber layer, a second rubber layer, an adhesion rubber layer in which a tensile member is embedded in the form of a layer and which provided between said first and second rubber layer. The top and bottom surfaces of the V-belt are covered with cover fabrics. The layer of the tensile member is obtained by spirally winding a continuous cord, and a line connecting the centers of the cords laterally of the V-belt is a part by 2 to 20% of the thickness of the V-belt from the center line of the V-belt.

Abstract: A rack and pinion steering assembly includes a housing with a first bore for rotatably receiving the pinion and a second bore for movably receiving the rack. A support member slidably engages the rack and includes a pair of arms opposing the wall of the first bore to prevent separation of the support member and rack away from the pinion. A resilient cooperates with one of the arms to bias the support member to pivot about the other arm. An optional ring cooperates with the other arm to adjust the position of the support member and the rack to take up wear between the rack and pinion or between the rack and support member.

Abstract: A valve actuator which is operable alternatively by a motor and manually. The motor is coupled into the drive train for the actuator through a planetary gear device so as to enable rapid actuation of the valve by the motor. The motor is coupled through a special one-way coupling to the sun-gear drive of the planetary assembly which permits the motor to drive the sun gear in either direction upon rotation of the motor but prevents rotation of the sun gear when the motor is arrested. A handwheel is coupled to the ring-gear drive of the planetary assembly through a worm and pinion so that the handwheel may then drive the ring gear under manual operation, but the ring gear is retained against rotation by the worm pinion when the handwheel is idle. The planet-gear drive serves as the normal output of the planetary assembly and is coupled to the valve spindle through a torque-limiting device.

Abstract: A speed reducer comprising a worm gear of the type suitable for driving proportioning pumps. The worm is rotated by an input shaft which is suitably journalled within a speed reducer housing wherein the input shaft bearings are respectively carried within aligned housing openings. Either one of the input shaft bearings is adjustable by means of a threaded hole in the housing where the input shaft is inserted. A threaded adjusting piece is screwed against the race of one of the bearings that hold the input shaft to precisely adjust the longitudinal alignment of the worm relative to the gear and to precisely load the two bearings that hold the input shaft to substantially eliminate excessive wear, vibration and chatter.

Abstract: A failure detecting apparatus for a dual valve provided in a pneumatic circuit for a slide of a press machine, which comprises an air tank containing compressed air therein, a clutch and brake mechanism for the slide selectively connectible with the air tank, a pair of solenoid valves connected in parallel with the air tank and the clutch and brake mechanism, each of the solenoid valves having two positions wherein the clutch and brake mechanism is connected to atmosphere when the solenoid valve is at first position and is connected to the air tank when the solenoid valve is at second position, and a pressure operated switch interposed between the solenoid valves and the clutch and brake mechanism wherein the pressure operated switch is adapted to be turned on and off for each cycle of the slide when both solenoid valves are in good working order.

Abstract: Gear tooth profiles are disclosed that afford a higher torque capacity than that of previously disclosed fine-pitch gearing. To offset the weakness in bending of fine teeth, the transmitted force is divided among two to five times as many teeth as in conventional gearing, by using very low pressure angles, and the tooth interference that would occur between meshed involute teeth of equally small pressure angle is avoided by using profiles of shorter relative radius of curvature. The tooth flexibility needed to offset tooth separation at the ends of the line of action and to insure an equitable division of the load among the maximum number of teeth is obtained by deepening the dedenda. The resulting tooth form increases torque capacity by maximizing the transverse contact ratio and minimizes operating noise by increasing the axial contact ratio.

Abstract: A device which automatically compensates for wear of a motor vehicle friction clutch by the engagement, during a working stroke, of a pawl or knurled element co-operating with a locking arm, with a toothed surface or knurling on a first link, and subsequent disengagement of said pawl upon the return stroke of a rocker arm due to the abutment of a stop with a second link which allows the first link to rotate out of engagement with the pawl, a spring biassing the links together and allowing the pawl to engage the first link in a wear-compensating position prior to the next working stroke.

Abstract: A derailleur in which a movable member is freely movable in its forward movement in a given range with respect to a base member without being subjected to action of a return spring, whereby when a control wire is pulled by a control lever, the stroke of the pull-operation, over the free rotation range, allows the movable member to move forward and the movable member, at the terminus of its forward movement, is movable forward freely within the given range such that it may be pulled by the tension of a bicycle chain engaging with a sprocket to complete a partially completed shifting operation.

Abstract: A control device for a bicycle derailleur cooperates with a control lever to control the derailleur through a control wire and absorb a change in length in the wire. The control device includes a positioning plate which serves to position the lever and is supported relatively rotatably under resistance greater than strength of a return spring at the derailleur, with respect to one of the lever and a fixing member supporting the lever, and is made freely rotatable with respect to the other, so that during operation of the lever for changing the bicycle speed the positioning plate, when subjected to a wire tension over a predetermined value, is secured to the lever or fixing member and, when subjected to a tension less than the predetermined value, is allowed to be freely rotatable, thereby automatically absorbing a change of length in the wire.

Abstract: A drum pulley arrangement for conveyor installations, comprising at least one drum pulley hub having a central opening and a bearing having a central opening aligned with the hub opening. A drum shaft extends through the hub opening and terminates with an end within the bearing opening. A sleeve surrounds a portion of the drum shaft and extends through the hub opening and bearing opening, the sleeve having an interior opening of a diameter adapted to rest on the drum shaft at least in some region of the shaft end. A tightenable tapered clamping assembly is provided for each drum pulley hub, the assembly serving when tightened to couple the sleeve to the drum shaft and to the hub for transmitting a drive torque from the sleeve to the hub and to the drum shaft.

Abstract: A worm gear is provided having a rotary worm screw which drives a reciprocal ball nut by means of a ball chain with coacting helical channeling effecting a raceway between the worm screw and ball nut. The invention resides in providing a ball return member in the interior of the worm screw such that a smaller number of balls in the ball chain may be used than has heretofore been possible in the prior art, and wherein friction is substantially reduced by the use of a smaller ball return channel in a median plane of the ball return member connecting at its ends with radial inlet and outlet channels. A considerable reduction in friction is achieved by the use of novel plastic bushings at the entrance and exit openings into the ball return member which greatly reduces the wear on the components.

Abstract: An emergency drive belt and a method of forming the same are provided, wherein such method comprises the steps of winding a ribbon of a cured elastomeric material having a bonding medium on at least one side thereof around at least two spaced apart pulleys and continuing such winding until the belt is built up to a desired thickness.