Showing papers on "Pulley published in 1979"

A method and apparatus for controlling an infinitely variable transmission of a motor vehicle

Abstract: In apparatus for controlling the transmission ratio of an infinitely variable V-belt transmission having variable pitch input and output pulleys operable by hydraulic cylinders, each pulley being formed of a pair of conical discs, at least one of which is axially movable relative to the other disc of that pair and the input pulley being driven by a power source: a hydraulic control valve for operating the cylinders, the valve having an internal axially movable spool; a device responsive to the speed of the input pulley for urging the spool in one direction; a compression spring urging the spool in an opposite direction, the spring being loaded through an intermediate connecting assembly by an external loading device; and a regulating device connected to the intermediate connecting assembly, the regulating device being responsive to an operating variable of the transmission.

Hydraulic belt tensioner construction

Abstract: A hydraulic tensioning device for maintaining a predetermined amount of tensioning force on an endless drive belt of a vehicle accessories drive system. A housing is mounted in a fixed position on the engine in close proximity to the drive belt. A shaft is movably mounted within the housing by an elastomer block which biases the shaft in a belt tensioning rotational direction. A lever extends outwardly from the housing and is integrally connected to the shaft for pivotal movement upon rotation of the shaft. An expandable bladder or actuator is mounted in the housing and is engageable with the shaft and pivots the rotor and lever toward a belt tensioning direction when the bladder is expanded by hydraulic fluid. A hydraulic fluid supply and pump assembly supplies fluid under pressure to inflate the bladder. An idler pulley drivingly engages the fluid pump and is driven by the endless drive belt for actuating the pump. The elastomer block applies a pretensioning force on the drive belt with the hydraulically inflatable bladder supplying the major portion of the tensioning force when the vehicle engine is running. In one form of the invention, the fluid supply and pump assembly is mounted in the housing and the lever either moves a pivotally mounted vehicle accessory or moves an idler pulley into belt engagement to tension the belt. In another embodiment, the fluid supply and pump assembly is mounted on the extended end of the lever in engagement with an idler pulley which both tensions the belt and drives the fluid pump with the elastomer block, bladder and shaft being mounted in a fixed position on the engine.

Mechanical belt tensioner construction

Abstract: A tensioning device for maintaining a predetermined amount of tensioning force on an endless drive belt for a vehicle accessories drive system. A housing is mounted in a fixed position on the vehicle engine adjacent the drive belt. A lever is pivotally mounted on a shaft which is located within the housing and extends generally radially outwardly from the housing and is adapted to move in a belt tensioning direction. A first pair of cylindrical, torsional coil springs is telescopically mounted on the shaft, with the springs being located one on each side of the lever. A second pair of cylindrical, torsional coil springs is telescopically concentrically mounted on the shaft and surrounds the first spring pair. One end of each spring is attached to the housing with the other spring ends being attached to the lever. The spring pairs are placed in torsion and bias the lever in the belt tensioning direction. An idler pulley is mounted on the end of the lever and is moved into tensioning engagement with the drive belt by the torsion springs, or alternately one of the vehicle accessories is mounted on the end of the lever for tensioning the drive belt which is engaged by the accessory pulley. The tensioner construction enables a large tensioning force to be obtained from a relatively small, compact, simple spring arrangement by using three or more torsional springs.

Endless power transmission belt

Abstract: An endless power transmission belt (10) comprises a plurality of V-belt components (11) spaced appart laterally of the direction of extent of the belt and a tie band (12) connecting the V-belt components (11) together to form a unitary structure. The tie band (12) is composed of a plurality of cord fabric layers (13) disposed one on top of another, each layer (13) comprising parallel cords (17) which are embedded in an elastomeric material (15, 16) and which are inclined with respect to the direction of extent of the belt (10). Each adjacent pair of cord fabric layers (13) have their cords mutually inclined at an angle between 95° and 155°, and also have a layer (14) of elastomeric material interposed therebetween to prevent the cords in said adjacent layers from rubbing against each other. The endless belt (10) has high stretchability both lengthwise and widthwise thereof, permitting the tie band (12) to conform to the shape of the V-belt components (11) when the latter locate in pulley grooves.

Method of pulley manufacture and product

Abstract: This invention relates to a novel method of making pulleys and pulley blanks from sheet metal. The sheet metal is stamped into pulley blanks having an upstanding cylindrical wall, the cylindrical wall is then thickened by being partially collapsed axially, followed by contacting with a roller. The roller can have a plurality of v-shaped grooves on its surface, to form a pulley for use with a poly-v belt.

Flat belt tire tester

Abstract: The flat belt tire tester which permits mounting a wheel and tire to be tested about an axis positioned above a flat belt, and has framework and controls for lowering the tire into contact with the belt under desired loads, using desired adjustments for camber and steering. The belt is powered, and can thus be used for testing the tire under simulated road conditions. The mounting framework and belt mounting construction of the present invention provides substantial rigidity through having the mounting frame geometry properly oriented in relation to the contact surface of the belt and also by providing a stiff frame for the belt mounting drums or pulleys.

Belt tensioner construction

Abstract: A belt tensioner for an endless drive belt for vehicle accessories has a shaft which is mounted in a fixed position adjacent the belt. A lever is pivotally mounted on the shaft and has an idler pulley rotatably mounted on an extended end of the lever. The pulley is movable into tensioning engagement with the belt by rotation of the lever. A first cam plate is slidably mounted on the shaft and is engaged with a second cam plate which is attached to the lever for rotation with the lever. The cam plates each have a plurality of a series of camming surfaces which are mutually engageable with the opposite cam plate surfaces. A plurality of spring discs are telescopically mounted on the shaft and bias the first camming block into engagement with the second block applying a rotational force on the lever to move the pulley into tensioning engagement with the drive belt. A hub is adjustably mounted on the shaft and is in abutting engagement with the springs to adjust the amount of camming force exerted on the lever, and correspondingly, on the belt by the idler pulley.

Side-bar chain for cone pulley transmissions

Abstract: In a side-bar chain for an infinitely variable cone pulley transmission, which chain is composed of packs of side bars forming successive links which are articulatedly connected with one another, and thrust pieces acting transversely of the longitudinal direction of the chain for friction force transmission between cone pulleys and the side-bar chain, the lengths of selected ones of the links, between associated articulations, are made different from those of the remainder of the links of the chain.

Solid state thermal engine

Abstract: An improved solid state thermal engine utilizes as a drive member a braided belt fabricated from a memory alloy such as nickel-titanium and nickel-titanium ternary alloys, copper-zinc and copper-zinc ternary alloys, and the like. The braided belt is mounted on a set of pulleys to provide passage through a hot zone where the belt contracts and develops tension, and through a cold zone where it relaxes and stretches. Since more energy is delivered by contraction than is required for relaxation, positive work output results with an efficiency of between one-fifth and one-third of the Carnot cycle.

Replaceable pulley lagging

Abstract: Replaceable pulley lagging--for an initially smooth-faced, endless conveyor or elevator belt drive pulley--comprising a multiplicity of relatively narrow, transversely extending traction pads pre-formed to mate with the arcuate pulley face, and applied edge to edge in a circumferential array and number to substantially fully embrace the face of the pulley; the traction pads being secured to the face of the pulley in detachable relation whereby to permit removal and replacement of said pads when worn or damaged.

Flat belt transmission with rotary actuator and integrated control system

Abstract: A continuously variable flat belt pulley transmission, using integral rotary actuators, is described together with controls to vary the transmission speed ratio upon demand and simultaneously operate an internal combustion engine or electric motor on a desired torque versus speed schedule.

Optical pulley alignment tool

Abstract: An optical alignment device for aligning the pulleys of a belt drive system in three planes. The device includes first and second members releasably attachable to each pulley. The first member mounts a target device having horizontal and vertical alignment markings corresponding to the centerline of the pulley. The second member mounts a viewing device having horizontal and vertical alignment markings corresponding to the centerline of the other pulley. The target is seen in the viewing device, when the horizontal and vertical markings of the viewing device and the target are superimposed, the pulleys will be in alignment in the horizontal, vertical and angular planes. A projector may be used in place of the viewing device to project a beam of light on the target in a second preferred embodiment of the invention.

Portable traction apparatus

Abstract: A portable bed, cot or "gurney" is modified to produce an apparatus which permits movement of a patient while under full traction. This is accomplished by a novel arrangement of stanchions, longitudinal and cross-bars supporting pulley rope and spring arrangements which form a part of the bed to maintain the traction while the patient is being moved over considerable distances, such as in evacuation operations and similar applications.

Single belt drive for a three-spindle rotary mower

Abstract: A single V-belt power transmission is provided for a three-spindle rotary mower without the belt crossing over itself or being subject to severe twists. The three spindles of the mower are disposed on vertical axes to form a triangular pattern with the lead or apex angle being forwardly of the other two spindles which are spaced laterally of one another. A swingable clutch idler and a fixed axis idler engage the flat backside of the V-belt and are so positioned on the mower housing that the single V-belt has a large arc of contact with the pulley on the central lead spindle and with a drive pulley positioned forwardly of the lead spindle. The idler pulleys also serve to so position the belt that there will be no contact between runs of the belt. The invention is illustrated in an underslung mower attachment for a riding tractor and includes an automatic brake, a manually operated height adjusting mechanism and a manual control for raising the mower to a transport position.

Lagging body for belt conveyor pulley

Abstract: A lagging body for a belt conveyor pulley comprises a wide and long rubber substrate and a number of rectangular or square small plate-like ceramic lagging elements aligned in the lateral and longitudinal directions and secured on the surface of said wide and long rubber substrate having a given thickness, wherein a lagging element is produced by adding an inorganic bonding agent essentially consisting of glassy material to ceramic particles, molding the resultant particles into a rectangular or square small plate-like article and firing or sintering the small plate-like article, and a number of the lagging elements are aligned on the surface of a wide and long length rubber substrate in the longitudinal and lateral directions and secured thereon. A free size lagging body is available to secure onto the outer periphery of a pulley drum by free size for repairing the pulley drum so as to eliminate inconvenience caused by the exchange of damaged pulley and wastefulness of time for waiting for the supply of new pulley.

Drive mechanism for the reciprocating meat supporting carriage of a meat slicing machine

Abstract: A drive mechanism for the reciprocating meat supporting carriage of a meat slicing machine wherein the carriage supports the meat product to be sliced and moves the meat product relative to a power driven knife, and which includes an endless belt trained over longitudinally spaced apart pulleys, thereby defining upper and lower horizontal belt runs extending between the pulleys, a drive member connected along the belt and having a driving lug mounted intermediate the ends thereof, the driving lug slidably engaging a drive slot formed in a driven bar extending from the carriage, the slot extending perpendicular to the direction of movement of the carriage, and the ends of the drive member being connected to the belt such that the path of the driving lug during the time the connected ends of the drive member traverse the pulleys follows a path substantially longer than the path of either connected end of the drive member, whereby the deceleration and acceleration forces of the driving lug are substantially less than those of the connected ends of the drive member.

Hydraulic belt tensioner construction

Abstract: A hydraulic tensioning device for maintaining a predetermined amount of tensioning force on an endless drive belt for the vehicle accessories drive system. A hydraulic cylinder is adapted to be mounted in a fixed position with respect to the vehicle engine and is operatively connected to the hydraulic fluid system of the engine. A bellcrank mechanism is pivotally mounted on the cylinder and has a belt-engaging idler pulley rotatably mounted on an extended end of one of the levers. The other lever is operatively engaged by the cylinder piston which pivots the idler pulley into tensioning engagement with the drive belt. A check valve is provided in the incoming hydraulic fluid passage of the cylinder and keeps that portion of the cylinder chamber which is located behind the piston filled with hydraulic fluid to maintain a constant predetermined tensioning force on the belt whether the engine is running or stopped, and to provide a shock-absorbing damping action for the idler pulley. The cylinder is connected to the power steering pump of the vehicle to provide a relatively high pressure to the cylinder for activation of the piston.

Multiply twisting machine for high speed helical winding of unitary strands to form a cable

Abstract: A multiple twisting machine, particularly adapted for quadruple twisting, said machine adapted to helically twist unitary strands and form a cable. The machine comprises two coaxially rotating frames, one frame being driven by the other frame via a reverser, said reverser rendered immoble by a weight and coupled to each of said frames by a belt. One of the frames comprises an external frame driven by pulleys at its ends and comprises two side plates connected by a stretched, taut rope which guides the cable over a portion of its path. The unitary strands enter the machine and the cable follows a predetermined path which ends where the cable is twisted about a cradle pulley which is stabilized by the weight. The internal frame is light and balanced to permit an elevated speed at rotation and speed up cable production.

Transmission mechanism having a variable transmission ratio

Abstract: The mechanism comprises at least one driving shaft and at least one driven shaft. A first pulley is keyed to rotate with the driving shaft and has a cheek which is fixed in translation and a cheek which is movable in translation relative to the first cheek. A second pulley is keyed to rotate with the driven shaft and has a cheek which is fixed in translation and a cheek which is movable in translation relative to the fixed cheek. A device is provided for controlling the displacement of the movable cheek of the first pulley. A transmission device extends around the first pulley and the second pulley. Radial elements adapted to be engaged in corresponding recesses in the transmission device are keyed to rotate with the driving shaft and the driven shaft between the cheeks of the first pulley and second pulley. The recesses are defined by portions of the transmission device which have a transverse elasticity so as to ensure the gripping of the radial elements when a force is exerted for moving the cheeks of the first and second pulleys toward each other.

Motorized bicycle conversion apparatus

Abstract: Apparatus for converting a conventional bicycle to motorized drive. An engine supporting frame assembly is positioned above the rear wheel of the bicycle, and maintained in position by attachment to existing frame members of the bicycle. Driving power is imparted from the engine to the driven wheel of the bicycle through a power train including a driven pulley which is attached to the bicycle wheel through a clamp assembly including two clamp plates engaging the hub of the bicycle wheel.

Winch drum cable length measurement apparatus

Abstract: The invention is an electronic wire length measuring apparatus for accurately measuring and indicating the height of a traveling block above a fixed reference point in oil well drilling applications where a traveling block is hooked to a cable and pulley arrangement and to a winch drum, said winch drum being used to vary the height of the traveling block. The wire length measuring apparatus produces an output visual indication of the height of the traveling block independent of variations in drum size, wire size, number of layers on the drum, and the weight load on the traveling block, which causes a lower actual traveling block position due to stretching in the wire.

Grain conveyor assembly

Abstract: A conveyor assembly for moving particulate material such as grain on a conveyor belt. The conveyor assembly includes a tail section, one or more intermediate sections according to the needed length, and a head section. The head section contains a powered drive pulley. The tail section contains a tail pulley. An endless conveyor belt is trained between the tail pulley and the drive pulley. Each intermediate section carries at least one roller for carrying the forward run of the conveyor belt. The intermediate section rollers have a contoured, concave surface to support the conveyor belt with a dish-shaped or concave profile such that material is held on the conveyor belt and inhibited from spilling over the sides. The tail pulley is mounted in a tail pulley shroud having a funnel-shaped outlet directed toward the forward run of the conveyor belt. The tail pulley has paddles which are operative to sweep up spilled material in the tail sections and move it around the shroud housing through the outlet to discharge it back onto the forward run of the conveyor belt. The longitudinal position of the tail pulley is adjustable in order to set the tension in the conveyor belt.

Apparatus for making multiple rib belts

Abstract: An apparatus and method is provided for making endless multiple rib power transmission belts each comprising one or more pulley engaging sections by separating these belts from belt bodies having a greater number of pulley engaging sections. The apparatus comprises support means, a belt holding and rotating assembly mounted on the support means and a cutting assembly mounted on the support means.

Vibration testing system for gear sets

Abstract: A pair of gears, which form a gear set, are tested by mounting the gears on parallel axis spindles which are located at a fixed center distance. One of the parallel axis spindles is contained in a spindle housing that is rigidly mounted to a massive base. The other gear of the set is contained in a spindle housing which is supported on top of a pair of parallel leaf springs that are connected to the base. The spindle in the spindle housing that is rigidly mounted on the base carries a pulley at its end that is remote from the gear set which is coupled through a drive belt and a second pulley to a drive motor. The spindle in the resiliently mounted spindle housing on the leaf springs is coupled to an eddy current brake at its end which is remote from the gear set. An accelerometer, which is coupled to a conventional electronic output indicator, is mounted on the resiliently mounted spindle to provide indications of the vibrations caused by the gear sets. The gears of the gear set are driven by the drive motor so that their tooth-to-tooth frequency is approximately the same as the resonant frequency of the resiliently mounted spindle housing. The construction of the testing system in the described manner substantially improves the signal-to-noise ratio of the output signal that is obtained from the accelerometer.

Adjustable V-belt

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. During installation, once the belt is positioned around the pulleys, the male end is inserted into the interlock passage. The male end is tapered for a short length in thickness for easy insertion (expanding away from the end point) to let a length of excess belt through the female end where the tightening device may be used. Beyond the tapered segment, the belt (male end) remains the same thickness to the female end. The interlocking force increases as a function of the length of the male end received through the interlock passage because of the increasing thickness of the male end.

Mechanical roping steer

Abstract: A pair of drive and idle pulleys are journalled from horizontally spaced apart elevated mounting structures and an elongated flexible tension member is trained about the pulleys. An elongated member extends between and is anchored relative to the mounting structures and a wheeled carriage is supported from the support member for rolling therealong. A crank is journalled from the carriage and a rotary friction drive member is journalled from the carriage and rollingly engaged with the support member for rotation relative to the carriage in response to its movement along the support member. One-way drive structure drivingly connects the drive member to the crank and an animal simulating structure is dependingly supported from the carriage and includes at least a first oscillatable body part simulating member. Connecting structure is connected between the crank and the body part simulating member for oscillation of the latter in response to rotation of the crank.

Apparatus for determining the reeving of a pulley system

Abstract: Apparatus for determining reeving of a pulley system including head pulleys on a jib or boom of a crane and reeving pulleys opposite the head pulleys. There is provided a sensor which may be electrically, mechanically, optically or pneumatically operable at some of the pulleys of the pulley system for sensing the presence or absence of the rope at its associated pulley. Each sensor provides a signal which is fed into a decoder module which may be connected to a display unit for displaying the information or a control device for enabling or inhibiting operation of the associated lifting equipment.

Vehicle drive transmission system

Abstract: A vehicle drive transmission system includes a continuously variable speed-control unit of the expansible pulley type whose output shaft is drivingly connected via a reduction gear unit to a differential gear. The differential gear has two coaxial output shafts which are connected to the half shafts of the vehicle's driving wheels. Both the reduction gear unit and the differential gear are epicyclic in form and are arranged coaxial with the output shaft of the speed control unit. To accommodate this compact arrangement, both the output shaft of the speed control unit and the input shaft of the reduction gear unit are made hollow so that one of the output shafts of the differential gear can extend therethrough.

Puller for removing pulleys and the like from shafts

Abstract: Disclosed is an improved puller especially adapted for removing pulleys from the shafts of engines such as lawn mower engines, small tractor engines, etc. The puller comprises generally a box-like member of heavy steel plates with one open wall. A jack screw is threadedly associated with one wall and a pulley, mounted on the shaft, is adapted to be received in position for operative thrust engagement with an opposite wall. Running in on the jack screw forces the hub or central portion of the pulley into operative thrust contact with the opposite wall, whereby the shaft is moved axially of the pulley, thus effectively removing the pulley without damage.

Safety clamp device and apparatus utilizing same

Abstract: An improved safety clamp device for use with movable platforms and the like includes a body member having a safety cable receiving cradle, a lever arm having a safety cable engaging portion, an elongate member carrying a pulley at either end, and a control arm. The control arm is in the form of a modified bellcrank having one arm portion pivotally connected to the body member, its apex connected to the elongate member and a pulley connected to a second arm portion. The lower end of the elongate member is rigidly connected to the movable platform. A drive or support cable passes on one side of the two pulleys on the elongate member and on the other side of the control arm pulley. The elongate member is maintained in a first position relative to the body member such that the safety cable engaging portion confronts but does not engage the safety cable when the drive or support cable is subjected to a predetermined tension. When the drive or support cable is subjected to less than the predetermined tension, the elongate member is maintained in a second position relative to the body member wherein the safety cable engaging portion engages the safety cable thereby wedging the safety cable against the receiving cradle.