Abstract: A roller shutter or door drum driving mechanism of the kind comprising a pivotally mounted electric motor, a gear train fixedly associated with said motor terminating in a pinion, a ring gear on the drum and manually operable, is furnished with releasable latch means which secure said motor and train in an operative position wherein the pinion meshes with the ring gear but, when released, permit the motor to move to an in-operative position wherein the pinion is clear of the ring gear.

Abstract: A V-belt for coupling at least two pulleys together, the pulleys having a substantially V-shaped groove, the belt being manually installable without moving or adjusting the distance between the pulleys. The particular usage of the present invention is for temporary (emergency) or permanent installation of a "fan" belt found on (but not limited to) conventional vehicles of the V-belt type. The device allows anyone, upon the destruction of a fan belt, to readily and quickly install a temporary pulley belt manually, without tools. For a permanent installation, a small implement may be used with the present device for increased tensioning of the belt in its proper position. The improved belt includes first and second free ends (male and female respectively that are firmly connected together by longitudinally interlocking a plurality of laterally disposed, inclined teeth located near the male end with lateral rows of inclined grooves located in an interlock passage in the female end.

Abstract: A wrapped, molded belt, and a method for making the same, are provided wherein the belt has a cover made from cord fabric. The angle of the strength cords of the cord fabric is different from the angle of the cords on the sides of the belt. The belt is produced by wrapping a desired width of cord fabric around a belt body, skewing the cords a desired amount and in a desired direction, depending upon which face of the belt body is being covered, and finally, curing the belt.

Abstract: A clutch construction has an improved arrangement for pivotally mounting a pair of centrifugally actuated clutch shoes on the drive rotor assembly of the clutch. A backing plate and drive flange are mounted in a spaced axial relationship with respect to each other on a hub of the rotor assembly for rotation with the hub which is adapted to be mounted on a drive shaft of a prime mover. A clutch housing is rotatably mounted on the hub by a bearing ring and is driven by the clutch shoes upon a predetermined shaft speed being reached. A pair of openings are formed in the backing plate located diametrically opposite of each other and are axially aligned with a pair of similar openings formed in the drive flange. A resilient bushing is telescopically mounted in each of the backing plate and drive flange openings to provide a shock-absorbing effect between the clutch shoes pivot pins and the drive flange to prevent fracture of the drive flange.

Abstract: A belt drive system featuring an adjustable belt tightener including coordinated gauge means for designating the proper belt tension according to changing positions of the belt tightener as the belt stretches during operation of the drive.

Abstract: Endless power transmission belts of spliceless, Mobius strip construction comprising a continuous strength member embedded in an elastomeric material, together with methods for the manufacture of such belts, are provided.

Abstract: A driving wheel for a cycle speedometer which is adapted to engage a driving belt in communication with the cycle speedometer. The driving wheel is attached to the cycle wheel or wheel block by a plurality of radially located resilient hooks.

Abstract: A device for tightening an endless element which is trained over driving members and which is accommodated in a drive transmission housing. A regulation member is provided outside the housing for easy adjustment of the tautness or tension of the endless element.

Abstract: A technique for correcting backlash in gears utilized in printing machines. The backlash is corrected by means of toothed segments, i.e. sections of a gear, with each segment having gear teeth of varying width, with the teeth at the center of the segment having greatest width and the width of successive teeth decreasing by 0.005 to 0.6 mm to minimum values at both ends of the segment. Each segment is positioned so that the gear teeth of proper diameter to reduce backlash are disposed next to the teeth of the gear on which the segment is mounted.

Abstract: A bicycle coaster brake hub having a gear-transmission therein is provided with a change-over mechanism between a driving member or clutch always rotatable together therewith and a gear frame including planetary gears and carrying actuators, such as rollers or a clutch, for operating brake shoes of a braking mechanism. The change-over mechanism causes a reverse rotation of the driving member induced by back-pedalling to be transmitted to a ring gear instead of the gear frame, whereby the gear frame is always reversely rotated through the ring gear at any driving speed stage from low to high, thus braking the bicycle wheels with a uniform braking effect regardless of what speed stage the gear transmission is in at the time of braking.

Abstract: A transmission or mechanical gearing for roller blinds or gates, window shades and awnings or the like, with a self-locking worm gear drive in a two part housing on one end of a shaft and an abutment for limiting of the number of rotations of the shaft in the unwinding direction. The abutment comprises an abutment pinion with the teeth number (n), the abutment pinion meshing with the worm wheel, a locking disc with the tooth number (n-1), the locking disc likewise meshing with the worm wheel, the locking disc being mounted coaxial to the abutment pinion, and an axially moveable abutment pin arranged in the abutment pinion, the abutment pin being prestressed with a spring and by means of a slot in the locking disc is able to engage in a double-sided abutment in the housing.

Abstract: The present invention relates to a bevolute gearing system which transmits torque between non-intersecting shafts at right angles to each other. The bevolute gear system includes a pinion gear which is flat and in one plane. The pinion gear is designed to include teeth which are shaped in the form of an involute spiral. The bevolute gear system includes a second gear which is also designed to include teeth which are shaped in the form of an involute spiral. The second gear is mounted on a non-intersecting axis at a right angle to the axis of the pinion gear. The bevolute gearing system of the present invention reduces the thrust loads to negligible values for the bearings of both the pinion gear and the second gear. In addition, higher mechanical efficiencies, wider tolerances on alignment of the gears, interchangeability between the gear and the pinions to produce different ratios and a substantially eliminated gear noise are a few of the many advantages disclosed in the present invention.

Abstract: A front derailleur for a bicycle is of the link type and comprises four members of a fixing member, two linkage members and a movable member, one of the four members carrying a chain guard for preventing a driving chain from coming off a front gear. The chain guard comprises a mounting plate for mounting to one of the four members and at least one guard plate for preventing the chain from coming off of the gear.

Abstract: A wheeled vehicle is described having a drive sprocket bound onto the axle fixed to the vehicle and a driven wheel with a sprocket on its axle, with the driven chain connecting the sprocket for transmitting power from the drive sprocket to the driven sprocket. The invention comprises a chain tension adjusting device having a means for mounting the driven wheel axle for limited movement thereof toward and away from said drive sprocket axle, a fork frame having its legs rotatably mounted on the driven wheel axle on either side of the said driven sprocket and terminating at its closed end in at least one sleeve, with camming means mounted within said sleeve, and means for manually rotating said camming means within said sleeve so as to move said driven wheel axle by means of the fork frame toward and away from said drive sprocket axle.

Abstract: In an intermittent transmission meshing mechanism comprising a toothed drive member having a toothed portion and a circular outer periphery continuous therewith and a toothed driven member having a toothed portion and arcuate locking faces formed on the opposite sides thereof, an oil retaining member having a projection projecting toward the drive member is provided on the driven member between the toothed portion thereof and each of the locking faces or on each of the locking faces. When an end of the circular outer periphery of the drive member adjacent its toothed portion comes into sliding contact with the toothed portion or locking face of the driven member, the corresponding oil retaining member slightly presses against and applies lubricant to the end.

Abstract: A multi-element writing instrument is disclosed for use in computer-operated plotters or similar graphics systems. Successive applications of a linear force applied along the axis of the instrument are converted to rotary motion which is employed to select successive elongate writing elements normally positioned at a uniform radial spacing from the axis of the writing instrument. Each selected element is displaced in a substantially axial direction a distance sufficient to extend the writing point of the element through the exit opening of the instrument.

Abstract: This invention concerns a bicycle derailleur comprising a screw engaging in a nut which is provided on the derailleur and which comes into contact with a stop member which is fixed in relation to the bicycle frame.

Abstract: In a belt there is provided an end region facilitating splicing or repair of the belt. The region includes a reinforcing core extending in the lengthwise direction of the belt and a separator layer. The separator layer is relatively non-adherent to the reinforcing core and facilitates removal of at least one of the outer cover layers for splicing or repair of the belt. The region is provided during manufacture of the belt.

Abstract: A wobble plate drive mechanism for machines having axial pistons or the like clustered about a shaft. The moving parts are dynamically balanced over a range of wobble plate tilt angles by a balance ring arranged outboard of the wobble plate. The wobble plate restraint has balanced gimbal rings.

Abstract: An improved chain speed reducer assembly comprising a drive shaft supported at one end by a first bearing block and by a second bearing block at the other end. Each of the bearing blocks has a shaft supporting bore that is axially displaced a predetermined offset distance from the central axis of the bearing block, and each of the bearing blocks is supported by a gear box frame so as to be selectively rotatable about the central axis of each bearing block. Attaching bolt connectors permit the bearing blocks to be secured at selected angular dispositions. This permits selective canting of the drive shaft, and when coupled with other similarly supported driven shafts supporting plural sprockets, separate strands of roller chains can be adjusted independently via the eccentric movement of the bearing block supporting bores upon selective rotation of the bearing blocks.