Showing papers on "Pulley published in 1970"

Positive power transmission system

Abstract: A toothed power transmission belt and pulley system is disclosed wherein the belt has an endless substantially inextensible tensile member with teeth secured thereto, the teeth having a cross-sectional configuration composed of two circular intersecting arcs for meshing with mating, conjugate, curvilinear pulley teeth. The size of teeth, length of radii of curvature, and the angles and point of intersection are determined by a set of design criteria and formulas as recited herein.

Variable speed transmission system and braking means

Abstract: A snowmobile variable speed transmission system using a sheave drive, the driven pulley of which is mounted directly on one end of the drive sprocket axle; thus the chain case, including the chain and all the associated parts, are no longer required in the transmission of power from the engine to the endless track. The other end of the drive sprocket axle is used to mount the disc of the brake mechanism.

Splined shaft and wheel retained thereon by spring and hub element

Abstract: A construction toy including a splined shaft and a wheel element nonrotatably fitting thereon and retained by a spring ring which grips the shaft. A hub element is detachably secured to the wheel, with the spring occupying a recess between wheel and hub elements to limit their movement on the shaft. A. The Problem Small children playing with mechanical toy building sets often have difficulties in securing pinions, pulleys, discs and similar wheel elements on shafts when building vehicles or other mechanical devices. Fastening such wheel elements on the shafts generally requires the use of tools or accessories which are difficult to handle for small children. B. The Solution Two essential features are required for solving this problem, and the invention consists in the combination of these features: A. To provide a shaft having a noncircular cross section and wheel elements having a complementary hole, so as to enable the child to mount the wheels on the shaft by pushing them thereon from one end, thereby fixing the wheels on the shaft so as to prevent relative rotational movement. B. To provide a frictional fit between the shaft and the wheels so that axial displacement can only be effected by overcoming the friction therebetween. To this end a cylindrical recess is provided in the wheel element surrounding the central hole therein and an annular spring is located in the cylindrical recess in such a manner as to exert a radial pressure against the shaft, thereby increasing the frictional resistance against axial displacement of the wheels relatively to the shaft. The functioning of this spring is automatic and requires no skill or attention on the part of the user. C. The shaft may be tapered at one end, so as to facilitate the mounting of the wheels. D. The width of the cylindrical recess or cavity within the wheel is greater than the thickness of the spring to prevent the spring from being jammed within the cylindrical recess. E. The cylindrical cavity or recess is closed so as to totally enclose the annular spring by means of a hub element assembled with the side of the wheel.

Variable ratio mini bike drive

Abstract: A VARIABLE-RATIO BELT DRIVE FOR MINI BIKES AND THE LIKE, RESPONSIVE TO BOTH ENGINE SPEED AND DRIVE TORQUE. A NORMALLY-OPEN, VARIABLE-WIDTH DRIVER PULLEY RESPONSIVE TO ENGINE SPEED IS CONNECTED BY A V-BELT TO A NORMALLYCLOSED VARIABLE-WIDTH DRIVEN PULLEY WHICH INITIALLY GIVES A HIGH-REDUCTION DRIVE RATIO, E.G., 3:1. ONE FLANGE OF THE DRIVEN PULLEY IS MOVABLE AND URGED TOWARD THE FIXED FLANGE BY LOW-ANGLE CAMS AND A TORSION SPRING. A MOVABLE FLANGE OF THE DRIVER PULLEY IS URGED TOWARD THE FIXED FLANGE THEREOF BY WEDGE WEIGHTS ACTING BETWEEN THE MOVABLE FLANGE AND A REACTION CONE, SO THAT INCREASED SPEED CLOSES THE DRIVER PULLEY AND EXERTS BELT TENSION TO OPEN THE DRIVEN PULLEY, WHICH LOWERS THE DRIVE RATIO. HIGH TORQUE CAUSES THE CAMS TO CLOSE THE DRIVEN PULLEY AND OVERCOME THE SPEED-RESPONSE CONTROL, HENCE TO INCREASE THE DRIVE RATIO TO HANDLE THE INCREASED TORQUE AT HIGH ENGINE SPEED.

Infinitely variable planetary transmission

Abstract: An infinitely variable forward and reverse drive mechanical transmission has parallel input and output shafts, a pair of variable diameter drive pulleys fixed on the input shaft, a pair of driven pulleys rotatable upon the output shaft, belts interconnecting one pulley of each pair with an associated pulley of the other pair, planetary gearing comprising a pair of ring gears nonrotatably connected to the respective driven pulleys, a rotatable carrier mounting planet gears meshed with one of the ring gears, a fixed carrier mounting idler gears meshed with the other ring gear and a common sun gear, and a single control lever is provided for inversely varying the effective diameters of the drive pulley.

Self-adjusting belt tightener

Abstract: An arrangement for positioning a tensioning member, such as the drive pulley of an alternator or generator associated with an engine assembly, against a flexible continuous drive means, such as a drive belt, to automatically maintain the drive means in a tightened position. The arrangement includes spring means for resiliently urging the tensioning member against the drive means in a direction to cause tensioning thereof, and stop means for preventing movement of the tensioning member in opposition to the spring force while permitting movement in the tensioning direction.

Automatic tension sensing apparatus for belt conveyor

Abstract: A sensitive measurement of tension in a belt is provided by movement of a belt carrying pulley mounted on a pivoted arm extending from the pivot to a position beyond the pulley where a calibrated spring permits limited movement of the arm in opposition to belt forces on the pulley. The movement of the arm actuates limit switches which are operatively connected to a take-up pulley mechanism for maintaining the desired tension in the belt.

Engine camshaft and accessory drive

Abstract: An overhead camshaft engine has a toothed belt drive wherein the back side of the belt is grooved to mate with multiple vee grooves and ridges of the water pump and fan drive pulley. The water pump is laterally movable on the engine block to provide a belt tension adjustment. The arrangement provides positive drive of the camshaft with nonpositive drive of the water pump and fan to permit slippage of the latter during excessive torque loadings.

Power driven shaper apparatus

Abstract: A shaper spindle and cutter are received in bearings in a hollow retaining quill and this assembly of parts is mounted for vertical adjustment in a shaper housing having a split cylindrical body suspended from the underside of an upright work table member. A special pulley housing attached at the lower end of the shaper housing contains a drive pulley isolated in vertically spaced bearings. The pulley is formed with a vertical spindle aperture in which is fixed a female spline drive element and within which is slidably supported a male spindle spline section. Stationary power driving means in the table member carries a pulley belt which engages around the drive pulley in constant alignment and with radial load imposed by the tension of the belt being effectively taken up by the vertically spaced bearings without transfer of any appreciable part of the load to the spindle.

Metal pulley with detachable plastic fan

Abstract: A belt pulley assembly comprises a metal pulley element which is detachably combined with a plastic fan that contains an embedded metal disk having an inner exposed rim that is slotted along with the hub of the pulley element to receive a drive key.

Rotary cutter assembly for a pavement grooving machine

Abstract: A rotary cutter head designed for use with tractionally driven pavement grooving machines. A large multiplicity of slightly spaced, radially disposed cutter disks having abrasive peripheries are clamped together by through bolts and mounted on a rotary tubular sleeve which is supported at its end on a fixed central supporting shaft by means of roller bearings. The assembly is driven by a pair of pulleys carried at the opposite ends of the sleeve and torque is applied from the pulleys to the sleeve through the medium of the through bolts which project through both pulleys, as well as through all of the cutter disks.

Transport belt alignment system

Abstract: This disclosure illustrates an inexpensive and reliable mechanical system for maintaining an endless transport belt in alignment with its direction of travel. A pair of sensing levers having mechanical belt position sensors in contact with opposite edges of the belt is provided for sensing a shift in the belt position along the longitudinal axis of a belt support roller. As the belt commences to shift, one of the sensing levers is actuated to apply a mechanically magnified torque to a roller adjusting lever coupled thereto, which torque is again magnified and applied in turn to the roller in a direction to induce increased tensile stress in the belt to cause the belt to become realigned with respect to its direction of motion.

Transmission belt-drive system

Abstract: A transmission belt drive system having an automatic change in ratio of drive-pulley belt diameter to driven-pulley belt diameter with increase in speed of the driven pulley by causing opposing flanges on each pulley to move with respect to each other thereby changing the point on the diameter of each pulley at which the transmission belt operates, a bracket rigidly attached to the driving pulley and a drive belt ratio locking device mounted in the bracket for selectively limiting the distance the drive-pulley flanges can move with respect to each other thereby maintaining a constant drive belt ratio regardless of the speed which the drive pulley is rotated.

Cable transmission control

Abstract: A SHIFT CONTROL SYSTEM HAVING A FIRST PULLEY OPERATIVE IN RESPONSE TO MOVEMENT OF A SHIFT-SELECTOR MECHANISM, A SECOND PULLEY OPERATIVELY CONNECTED TO AN AUTOMATIC TRANSMISSION, A FIRST CABLE PORTION CONNECTED TO THE FIRST PULLEY, A SECOND CABLE PORTION CONNECTED TO THE SECOND PULLEY, AND A CENTRALLY LOCATED SPRING-LOADED CABLE-CONNECTOR DEVICE, THE LATTER INCLUDING A BRACKET AND A PAIR OF FASTENERS FOR CONNECTING EACH PAIR OF OPPOSING ENDS OF THE TWO CABLE PORTIONS AT FINAL ASSEMBLY, AND RESILIENT MEANS FOR MAINTAINING THE CONNECTED CABLE PORTIONS TAUT AND FOR AUTOMATICALLY COMPENSATING FOR ANY SUBSEQUENT CABLE STRETCH AND MAINTAINING INITIAL PRELOAD. THE SYSTEM MAY ALSO INCLUDE A RATCHET ARRANGEMENT FOR PREVENTING COLLAPSE OF THE RESILIENT MEANS SHOULD THE OPERATIONAL LOAD EXCEED THE INSTALLED RESILIENT MEANS LOAD, THEREBY PREVENTING A POSSIBILITY OF THE OPERATOR EXPERIENCING A "SPONGY" PEDAL REACTION.

Variable diameter centrifugal pulley with means to vary the mass of centrifugal weights

Abstract: A variable diameter centrifugal pulley for use as a drive pulley in a variable speed belt and pulley transmission for snowmobiles and other vehicles, of for any machinery requiring a variable speed transmission, wherein the centrifugal weights consist of blocks provided with a cavity, closure means for said cavity, and calibrating elements removably inserted within said cavity, in order to vary the mass of the centrifugal weights, and thus adjust the rotation speed at which clutching takes place and the variation of the belt diameter on the pulley with change in the rotational speed of the pulley The pulley also has a spring in which the increase of its resisting force is a non-linear function of the amount of its shortening so as to obtain belt declutching during engine deceleration at substantially the same rotational speed as during engine acceleration

Cable hold-down device

Abstract: A cable hold-down device comprising a frame which can be positioned to extend adjacent and about a portion of the circumference of a cable drum. The frame carries a rotatable pulley to press against the last section of cable wound on the drum. The frame rides on the drum and has means for biasing the pulley against the cable.

Infinitely variable speed belt transmission with conical pulleys

Abstract: One of the two conical pulley discs mounted on a common shaft of an infinitely variable speed belt transmission has a central bore lined with a smoothly cylindrical antifriction bushing which permits free movement of the disc on the shaft in an axial direction and does not interfere with rotation of the disc on the shaft. The bushing has a continuous metallic backing fixedly fastened to the axially movable disc and a facing of porous sintered metal on the backing and engaging the shaft, the pores of the facing being filled at least partly with a solid fluorocarbon.

Accessory drive mechanism

Abstract: An engine accessory drive mechanism wherein a first pulley portion is driven by the crankshaft and a second pulley portion is mounted on the water pump shaft and driven by a belt interconnecting the two pulleys The second pulley portion includes provisions formed thereon for mounting additional belts to drive the other engine accessories Each pulley portion includes one wall which is movable in response to changes in engine vacuum, with the influence of the engine vacuum on the movable walls being modified by the action of centrifugal force, the flyweight mechanism therefor being mounted on the first pulley portion, and the overall result being that the interconnecting belt is moved alternately in and out of the variable pulley grooves, changing the respective pitch diameters as required to drive all the accessories at a substantially constant speed throughout the full range of engine speeds

Vacuum conveyor beam

Abstract: A conveyor beam including an endless, vacuum conveyor belt supported at its ends by drive pulleys and in the center by a vacuum manifold. Perforations in the belt register with an elongate slot in the manifold, in line with the direction of belt movement, to grasp and retain objects on the belt. Guide pins are secured on the inner surface of the belt, interspersed with the perforations, adapted to project into the slot and slide therealong to maintain the moving belt in alignment. The upper surface of the manifold and the edges of the slot are lined with a material having a low coefficient of friction, such as graphite impregnated nylon.

Power conductor takeup system

Abstract: This invention relates to an improved system for providing power to the extremities of telescopable or expandable equipment comprising a fixed member and a movable member. A pulley system, independently movable with respect to the fixed and movable members, is rotatably transversed by a substantially lineal flexible power conductor. This power conductor is attached at one of its ends to a power source on the fixed portion of the equipment and at its other end to a power utilizing means on the movable portion of the equipment. Means are provided to move the pulley system in relation to the movement of the movable member so that the power conductor is held in a substantially taut condition throughout the range of movement of the movable portion of the equipment.

Means for making pulleys

Abstract: A pulley making method and apparatus for forming a pulley having a pulley groove of given cross section defined by flange walls connected through the root of the groove, the groove having a given root diameter, from a pulley blank in the form of a sheet metal cup having an annular bulge in the cup wall and an adjacent flaring wall portion, with a valley defined between the bulge and adjacent flaring wall portion. A pulley is formed from the blank by engaging the flaring wall portion and the side of the bulge remote from the valley with axially movable dies and moving the dies together to crush the bulge and form it into a double wall. Groove-forming rolls are positioned within the valley so that they extend radially inwardly to an imaginary circle having a diameter equal to the root diameter prior to the attainment of a final forming position by the axially movable dies. Relative rotation is established between the pulley blank and the group of rolls and the rolls roll within the valley to receive the axial thrust of the bulge as its crushing is completed, and to keep the valley clear as its shape approaches and conforms to the desired pulley groove cross section.

Vehicle speed-change and steering apparatus

Abstract: A vehicle speed-change and steering apparatus comprises a pair of right and left stepless speed-change mechanisms each having a stationary pulley, a movable pulley and a belt interposed between the two pulleys, the pulleys being mounted on a driving shaft. A pair of rack rods are respectively connected to the right and left movable pulleys, and the rack rods are meshed with a single common pinion, such that the right and left movable pulleys are constrained to be moved in equal quantities in mutually opposite directions by the operation of a rotation detecting mechanism on the driving shaft and engaging the moving pulleys. Additionally, the right and left pulleys may be moved in the same directions by moving the pinion to the right or left to effect differential variation of speed of the belts of the speed-change mechanisms.

Belt grinding or polishing machine

Abstract: A belt grinding or polishing machine wherein the abrasive belt is trained over several pulleys so that it includes an elongated stretch which extends between two pulleys and the outer side of which removes material from travelling workpieces. A pressure applying wheel engages the inner side of the stretch and is movable in and counter to the direction of travel of the belt as well as at right angles to the stretch to thus enable the belt to remove material from flat or more complicated surfaces.

Belt tightening tool

Abstract: A belt tightening tool for adjusting the tension in the belt of a belt and pulley drive assembly having an adjustably mounted pulley consisting of a pair of pulley saddles for bearing against the grooves of opposite pulleys of the drive assembly. A screw bar adjusting assembly is operatively connected through pivotally connected connecting links to the pulley saddles for expanding and contracting the interval between the pulley saddles relative to each other along a common axis and for locking the pulley saddles in position relative to each other along the common axis.

Wire reeling device

Abstract: A two-wheel trailer frame horizontally journals a reel in a parallel vertically spaced relation with respect to the trailer axle. The reel is rotated in response to forward movement of the trailer by a frame supported clutch frictionally engaging the periphery of one trailer wheel. Frame supported belt, pulley, chain and sprocket means, connected with the other end of the reel, reciprocate a wire guide transversely of the reel as the trailer is moved forwardly.

Timing belt assembly

Abstract: This application sets forth a timing belt assembly having an attachment fitted to the timing belt to transmit the timing belt displacement to any piece of equipment coacting with the timing belt. The displacement transmitting attachment can be used to index, actuate switches, move slides or sleeves, or any of a wide variety of other operations, in accordance with the displacement of the timing belt. The pulleys on which the timing belt is mounted include special recesses which accommodate the displacement transmitting attachment of the timing belt to assure proper seating of the attachment when that portion of the timing belt, with the attachment thereon, engages the pulleys.

Miltipurpose exercising device

Abstract: A combined sport apparatus including a flat bench, with an inclined arm support, elevated dumbbell supports and a weightlifting pulley and line arrangement.

Racing centrifugal clutch assembly

Abstract: In a centrifugal clutch including a drive shaft, a pair of pulley flanges mounted on said drive shaft and providing therebetween a groove for a V-belt, one of the pulley flanges being axially movable on the drive shaft to vary the radial position of the V-belt with respect to the pulley flanges, apparatus for axially moving said movable pulley flange in response to the angular velocity of the drive shaft, comprising a cam ramp fixedly mounted to said drive shaft in spaced relationship with the side of the movable pulley flange, said cam ramp including a portion curved toward said movable pulley flange, a centrifugal weight mounted for radial movement with respect to said movable pulley flange and said cam ramp, and means for inhibiting the radial movement of said centrifugal weight until a predetermined drive shaft angular velocity is reached.