Abstract: A device for preventing separation of a belt from a motor pulley comprises a protection cover for covering a pulley attached to the output shaft of a motor, a guide slot formed in the protection cover extending into a predetermined direction, a belt separation preventing plate supported on the side of the motor pulley by a supporting body which passes through the guide slot, and retaining device associated with the supporting body to fix the plate to the protection cover by a spring pressure.

Abstract: The derailleur comprises, between the conventional articulation mechanism which allows the lateral displacement of the chain guide device (12), an additional articulation mechanism (10, 11) whereby the chain guide device (12) can effect a displacement which is substantially free and of large extent in a plane perpendicular to the axis (X--X) of the crank-gear. This very substantially improves the conditions under which the chain is shifted from one chain wheel to another.

Abstract: A transmission ratio varying arrangement involves establishing transmission between a drive shaft and a driven shaft by two orbital systems, one for each shaft, and including gear wheels which move concentric to the respective shafts thereof. One orbital system is joined to the other by simple or composite conventional transmission elements, the radius of each orbit being variable simultaneously, maintaining the sum thereof constant. Each of the shafts is provided with an identical truncated thickening which is in direct position and which, acting as a wedge, contacts radial supports which are guided in holes made in a sleeve which is equally spaced from the holes and which is provided at its outer part with peripheral wings perpendicular to the shaft. The wings are provided with radial notches in which there are guided the shafts on which there rest the gear wheels which move when the thickened shaft and the sleeve turn in unison joined by keys.

Abstract: A sprocket wheel for mining applications comprises a forged, austenitized and oil-quenched body which consists essentially of:0.7 to 1.0% by weight manganese,0.7 to 2.2% by weight chromium,0.3 to 0.6% by weight molybdenum,0.5 to 2.2% by weight nickel,up to 0.45% by weight carbon, andbalance iron and usual steel impurities and which is surface-hardened to a depth of about 2 mm, has a hardness of substantially 55 to 60 HRC and a strength of 1400 to 1600 N/mm.sup.2.

Abstract: A tension-type belt/pulley system provides an improved concept for retaining the bands of the drive belt within the pulley cones while increasing the maximum operating pitch radius of the belt for a given pulley radius, thereby increasing the ratio range of the system. The pulley flanges are chamfered at their outer ends to provide smooth re-entry of the bands into the cones in the event the bands drift laterally during a half revolution of the belt.

Abstract: An integral link-and-pivot member for an endless power transmission chain comprising longitudinal spaced web portions joined to transversely oriented joint portions, each joint portion having an arcuate or curved surface, said surfaces facing one another and being adapted to engage a like surface of an interleaved member when assembled as an endless chain and a chain assembled from such members.

Abstract: A tensioner for a power transmission belt or the like that is adapted to be operated in an endless path and a method of making the same are provided, the tensioner comprising a support unit for being fixed relative to the belt, a belt engaging unit carried by the support unit and being movable relative thereto, a polymeric spring unit being operatively associated with the support unit and the belt engaging unit for urging the belt engaging unit relative to the support unit and against the belt with a force to tension the belt, and a coiled mechanical spring also being operatively associated with the support unit and the belt engaging unit for urging the belt engaging unit relative to the support unit and against the belt with a force to tension the belt whereby the polymeric spring unit and the mechanical spring combine to define the tensioning force for the belt while the polymeric spring unit additionally tends to dampen the movement of the belt engaging unit relative to the support unit, the mechanical spr

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about a longitudinal axis of the hub. The pulley has a pair of opposed facing sides defining at least part of the groove therebetween and has a pair of oppositely facing outboard sides, the sides each having an inner peripheral portion and an outer peripheral portion. The pulley has a plurality of circumferentially spaced apart and radially disposed substantially straight vanes extending outwardly from at least one of the outboard sides thereof.

Abstract: A belt-pulley drive mechanism comprising a pulley having a plurality of circumferentially extending grooves of V-shaped cross-sectional configuration, a belt adapted to be passed around the pulley and stretched under tension so that the belt is engaged with the pulley in torque transmitting relationship, the belt being formed with a plurality of longitudinally extending ridges of V-shaped cross-sectional configuration which are adapted to be engaged with the grooves in the pulley when the tension is applied to the belt. The grooves or the ridges or both are formed in a cross-section along a concave line so that a clearance is formed between the pulley and the belt when the tension is removed from the belt, the clearance being larger at a transversely central portion than at side edge portions.

Abstract: A variable pitch diameter torque sensing pulley assembly which includes a first pulley half with a hub and a second pulley half mounted on the hub for axial and rotational movement. The assembly includes two sets of cams and a set of cam followers for biasing the pulley halves toward each other with a force which varies directly as the torque being transmitted by the pulley assembly varies. The two sets of cams are arranged so that one set of cams transmits torque when the pulley halves are close together and biases the pulley halves toward each other with a relatively small axial force based upon the torque being transmitted and the other set of cams transmits torque when the pulley halves are far apart and biases the pulley halves toward each other with a relatively large axial force based upon the torque being transmitted.

Abstract: A sprocket assembly with replaceable teeth including a generally cylindrical sprocket equipped with a plurality of L-shaped pockets in the periphery thereof for the receipt of a tooth having an inner end equipped with a partial T-shape and wherein wedge lock means operate against the T-shape to cooperate with the chain force in maintaining the seat of the tooth within the pocket.

Abstract: A pulley has a planar end wall and an annular wall extending axially outwardly therefrom. The annular wall is formed with belt receiving grooves and the end wall is formed with a central opening for mounting the pulley on a hub or shaft. A stamped sheet metal washer having a generally annular configuration is formed with a central hole and an integral projection extending radially outwardly from the outer edge of the washer. The washer is firmly attached to the end wall of the pulley preferably by welding or by bonding with an acrylic structural adhesive with the central hole of the washer being concentric to the central opening of the end wall. The projection is positioned to counterbalance any unbalance in the annular wall that may have developed therein during forming of the pulley.

Abstract: A variable capacity flywheel comprises a main flywheel coupled with the rotating shaft of an engine and at least one rotatable auxiliary flywheel. Both are selectively engaged and disengaged with one another by means of an electromagnetic clutch. Both flywheels are engaged with one another by an energizing member in the low speed range of said engine. Both are disengaged from one another by means of excitation control of the electromagnetic clutch in the high speed range of the engine. A generator driven by the engine rotating shaft is connected in series with the electromagnetic clutch and a battery.

Abstract: A sprocket for a bicycle comprising a sprocket body and a number of teeth provided circumferentially at the outer periphery of the sprocket body, teeth being shaped so that a length between the tooth crest of each tooth and the axis of rotation of the sprocket body, is made smaller than that between a phantom plane connecting both circumferential edges at the tooth crest and the axis of rotation, both the edges being acute-angled.

Abstract: A belt drive attachment for motor driven machines comprising a vertical frame with top and bottom ends, spaced front and rear ends and spaced sides, a substantially flat mounting wall at the upper forward portion of the frame to engage and be fastened to a motor mounting pad on a related machine, bearing means within the frame, an elongate countershaft rotatably carried by the bearing means and having a portion projecting from the frame and a portion within the frame, a mounting plate at the lower rear portion of the frame to releasably cooperatively engage a motor mounting frame of a related motor, hinge means pivotally connect the plate to the frame for pivotal movement of said plate and a related motor relative thereto, clamp means engaged with and between the frame and the plate and releasably hold the plate in fixed pivotal position, a multi-diameter/multi-sheave input pulley wheel is drivingly engaged on the portion of the shaft within the frame, a drive belt is engaged about and between the input pulle

Abstract: A pulley device having a bearing of precise dimensional tolerance (precision ground) supported in a sheave of less precise tolerance including a ball or roller bearing with an inner and an outer race, and an elastic ring supported by the outer race. The pulley device additionally includes a two piece sheave enclosing the outer race and the ring effective to place the ring under a compressive load whereby the main body of radial load on the pulley is transmitted to the bearing through the ring, resulting in the ring being compressed around the outer surface of the bearing assuring a firm, reliable grip on the bearing, and while the sheaves are in contact with the end portion of the outer race of the bearing to maintain proper roundness of the bearing as precision ground.

Abstract: The derailleur comprises a chain guiding and shifting device in the form of a fork member (2) articulated to a support (1) adapted to be fixed to the frame of the bicycle. At least one (4) of the wings of the fork member (2) has a part (11) which is adjustable in position so as to adapt the width of the at least one wing (4) to the diameter of the small chain wheel of the crank-gear.

Abstract: A variable speed transmission (20) includes a sprocket (46) mounted on a first shaft (22) for rotation therewith. A variable effective diameter pulley (30) is mounted for rotation on a driven shaft (32). The pulley includes a pair of pulley halves (80, 82) having opposed inclined belt engaging surfaces (84, 86) and splines (90, 94) extending from the pulley halves. The splines are intermeshed so that the pulley halves may be drawn together or separated while rotating as a unit. A split shaft (130), including two half shafts (132, 134), extend within the pulley halves. Each half shaft engages one of the pulley halves such that as the half shafts are moved relative to one another, the pulley halves are moved one relative to the other. A pulley control mechanism (66) is provided for moving the halves of the split shaft simultaneously such that the center line of the pulley remains fixed as the pulley halves move together or apart.

Abstract: An improved curved cable support member adapted to the ends of the rail guides of a Bowden window lift. This support member (2) comprises at least one projecting first catch means at its side facing the rail guide (1), the projecting catch means is undercut so that a free gap about the material thickness of the guide rail (1) exists between a free-standing lip (3) and the body of the support member, and the free-standing lip (3) is provided at its inside with a beak (4) entering a corresponding clearance (5) in the guide rail when the support member is slipped onto the guide rail and secures the support member against being pulled off the guide rail.

Abstract: A device for adjusting the tension of a drive belt such as the belt used to drive an alternator or other accessory in an automotive engine. The tensioning device includes one angle bracket secured to a slotted plate having an arcuate slot formed about a pivot axis on which the accessory is angularly adjustable. An adjustment bolt secures another angle bracket to the slotted plate and is extended through the arcuate slot and threaded into the accessory. A machine screw extends between the two angle brackets and is threaded through one of them. The screw drives the brackets toward and away from one another to adjust the belt tension when the screw is turned with the adjustment bolt loosened. When the adjustment bolt is tightened, it locks the accessory in place.