Showing papers on "Pulley published in 1973"

Camshaft belt drive for variable valve timing

Abstract: A timing belt drive system for driving the camshafts in internal-combustion engines which provides control of the valve timing and overlap. Slack is provided in the timing belt, and is taken up by movable idler pulleys. The positions of the centers of the idlers are displaceable under external control, as in response to engine speed and intake vacuum. Displacement of the idlers thus operates to change the angular relation between the drive pulley on the crankshaft and the driven pulley on the camshaft, i.e., the valve timing. In dohc engines having separate camshafts for the intake and exhaust valves, the valve ''''overlap'''' is similarly controllable. The system provides higher efficiency over a wider range of speeds, and reduces the emission of pollutants.

Control device for a motor and an infinitely variable cone-pulley gear

Abstract: In a drive which includes a motor of variable power output and load-dependent speed of rotation and an infinitely variable cone-pulley transmission driven by the motor, fluid pressure is supplied to the transmission for controlling the sides of the transmission to adjust the transmission ratio. A control slide is provided for adjustment of the pressure of the fluid, which is controlled by an accelerator pedal and a centrifugal governor rotating proportionally with a part of the drive. The regulating lever at each setting provides a specific motor speed at which the centrifugal governor is in the steady state. In transmitting the motion of the accelerator pedal to the control slide, a delay arrangement is provided which retards the movement of the slide by the movement of the pedal. This arrangement delays the movement of the control slide in inverse proportion to the speed of movement of the pedal.

Push-pull type exercising device

Abstract: The exercising machine has a pulley and a cable with a body engaging end and a force resistance end. The pulley has wheel of non-circular configuration whereby movement of the cable by the user will cause cyclic sidewise movement to be imparted to the cable and vibration motion will be set up in the cable and transmitted to a user.

Continuously variable automatic transmission

Abstract: The invention comprises a continuously variable automatic transmission in which the input shaft drives the planet gear carrier of a planetary gear train, the internal gear being connected to the output shaft and the sun gear being driven by the input shaft through an expansible pulley V-belt drive, the ratio of which is controlled by a centrifugal device driven by the input shaft.

Apparatus and method for automatically separating magnetic from non-magnetic substances

Abstract: An apparatus and method for automatically separating magnetic substances such as tableware from non-magnetic substances such as food and paper waste having a frame, pulleys mounted for rotation near opposite ends of the frame, an endless conveyor belt mounted over and carried by the pulleys on which unseparated substances may be placed and magnetic means mounted in one of the pulleys to establish a strong magnetic field through the conveyor belt thereby attracting and separating the magnetic substances from the non-magnetic substances and causing them to be retained adjacent the conveyor belt despite the removal of the nonmagnetic substances from the conveyor belt by gravity as it moves around the pulley. A number of inductor bars placed adjacent the pulley containing the magnetic means and near the underside of the belt to develop induced magnetic fields which attract the magnetic substances but cooperate with one or more circuit shunt bars carried on the endless conveyor belt at spaced distances along it to automatically release these substances as the circuit shunt bars come adjacent the inductor bars and shunt or short circuit the magnetic field from these substances. An apparatus for automatically separating magnetic and nonmagnetic substances having at least two endless conveyor belts supported at their opposite ends on upper and lower pulleys, respectively, disposed in vertical relationship, in which one of the upper pulleys contains magnetic means of sufficient strength to attract magnetic substances moving on the lower conveyor belt below that pulley to separate such substances from non-magnetic substances on that belt.

Push-pull type of exercising device

Abstract: A body exerciser comprising a pair of flexible lines, each has at one end a loop to be grasped by a hand of a user and a stirrup at the other end for holding the line tensioned by a person''s foot. Each stirrup includes two loops, one engaging the bottom of a foot of a user and the other engaging the ankle of a user. Each line passes over a pulley which is secured by hooks to a member which in turn is connected to a fixed support. In use of the exerciser, an arm is moved simultaneously with the leg, the hand and foot being attached by the line so that the tension in the line is between the hand and foot so that the exertion of one member is balanced against the other.

Conveyor systems for cigarettes and other rod-like articles

Abstract: A cigarette elevator for conveying upwards a stack-like stream of cigarettes comprises substantially parallel upwardly-extending conveyors of which at least one has transversely extending ribs on its operative face for engaging the cigarettes, a first pulley around which the ribbed conveyor passes at the upper end of the elevator, and a second pulley which is adjacent to the first pulley and has an axis of rotation which is parallel to (but slightly offset from) the axis of rotation of the first pulley, and including a substantially horizontal conveyor which passes around the second pulley, the arrangement being such that the ribs on the ribbed conveyor disappear progressively below the upper surface of the horizontal conveyor.

Spare tire carrier

Abstract: Spare wheel handling is aided by a counter weight structure in which an arm on which the spare wheel is carried is pivoted on a second member arranged for attachment to a vehicle. The "counter weight" is a spring in which energy is stored when the wheel is lower. The arrangement of the members and the spring includes several features which contribute to easy reliable operation. One of these features is the use of a cable and pulley structure which permits use of a long spring and modification of the rate of energy storage per increment of wheel position change.

Device ofr damping pendulum movements

Abstract: A hoist structure with a load frame suspended on cables in which swinging movements of the load frame in which at least the lateral direction are damped. The suspending cables include a pair of cables in longitudinally spaced relation with the cables of each pair spaced in the lateral direction. Each cable leads downwardly to the load frame and about a pulley and upwardly to a point of connection. The pulleys pertaining to the cables of a pair of cables are coaxially and relatively rotatably and damping means are provided, preferably fluid damping means, and interposed between the pulleys of each pair of pulleys so that relative movement between the pulleys is damped and thereby lateral swinging movements of the load frame are damped.

Machine for cutting brittle materials

Abstract: A plurality of pulleys defining a continuous wire path including a wire storage system and a cutting area, with a reversible drive motor connected in the system to periodically reverse and produce a sawing motion in the wire. The various pulleys in the system are canted so that wire entering and leaving the groove in the periphery of each pulley lies in the plane of the pulley to reduce or remove transverse forces on the wire tending to pull the wire out of the groove. A motor connected to a spool supplying new wire to the system is controlled to produce a constant tension in the wire of the system and a motor connected to a spool operating to take up used wire in the system is controlled to maintain a predetermined constant rate of movement of the wire in the system.

Reciprocating pulley drum cable drive

Abstract: A screw threaded reciprocating cable drive means comprised of an elongated, screw threaded pulley drum, fixed to a drive shaft, connected to a reversible motor means by a telescopic coupling. A nut, fixed relative to a frame, is carried on the screw threaded drum whereby reciprocating movement is imparted to the drum when the motor means is alternately energized in forward and reverse directions. Cable means engaged in the screw threads of the drum are driven thereby without traveling with the drum.

Self-unloading vehicle

Abstract: A flexible unloading belt normally covers the floor of a vehicle body such as a trailer body and extends back under a transverse roller at the rear of the trailer body. The rear end of the belt is deadended below the floor of the trailer. A drive roller set which is operated by an hydraulic ram is engageable within a looped portion of the flexible belt below the trailer body floor to exert a pull on the belt and cause movement of the upper portion of the belt rearwardly to unload the trailer. A pair of cables, operatively engaged around pulleys on the drive roller shaft and around pulleys at the front of the trailer floor, are connected to the front end of the belt to return the belt to its normal position when the hydraulic ram is retracted. The belt travels beneath a fixed bulkhead spaced from the front of the body and beneath a tailgate which is adapted to be opened by linkage arms which are rocked by a hydraulic cylinder.

Automatic drive for sliding doors

Abstract: A drive for a pair of sliding doors including a linear motor having its stator fixed relative to the frame of the doors and its armature connected to a pulley and rope assembly which is movable therewith to effect opening of the doors. Means are provided for adjusting the axis of rotation of the pulleys in three planes to adjust the tension on the rope and adjust the alignment of the pulleys.

Convertible fitting for pulley

Abstract: A U-shaped fitting for the attachment post of a pulley which enables the post of the pulley to be fitted either with a shackle or with a U-adaptor and pin.

High speed variable ratio pulley

Abstract: Improved safety and operation is obtained in a high-speed variable ratio pulley having a movable pulley flange which is driven rotatively by torque transmitting engagement between fixed spider arms and drive posts adjacent the periphery of the movable pulley flange, and is thrust axially toward a fixed pulley flange by centrifugal cam levers acting between the movable pulley flange and the spider arms. The drive posts closely straddle the thrust line and are long enough to give clearance for the intended flange movement, and their ends are tied together by a tie plate and a ductile bell housing which also engage an outboard bearing to support the posts and movable pulley flange against tilting. Cam movement of the pulley flange is limited, in one case by providing the cam levers with hooked ends which stop their swing at a point short of thrusting the movable pulley flange into forceful abutment with the fixed pulley flange, and in another case by positioning the tie plate to move as a stop against the ends of the spider, substantially on the cam thrust line. For special applications, the spider is adjustably positioned to provide different cam locations and engaging speeds.

Cable spooling guide

Abstract: A guide for paying out and feeding in a cable relative to a cable drum includes a pulley mounted on a ball for axial rotation and for limited pivotal movement on an axis disposed perpendicular to said axis of rotation, the ball being mounted on a shaft for reciprocative movement along the latter substantially parallel to the axis of rotation of the cable drum, whereby the pulley guides the cable as the latter spools spirally relative to the axial direction of the frum.

Method of pulley manufacture

Abstract: Structure and methods for production of single and multiplegroove pulleys from cold deformable metal. Several steps are used in the formation of a pulley as a pulley is produced by progressive forming die members. During some of the first operations, several definite and critical break rings and angles are established in the blank so that in subsequent forming operations consistent desired shape can be obtained during collapsing of the metal.

Variable ratio belt-type transmission having improved driven pulley

Abstract: A variable ratio belt-type transmission. The transmission transmits power from a driving shaft of the engine to a driven shaft of the cycle when the engine is running, and transmits pedal-generated power from the driven shaft to the driving shaft to start the engine when it is not running.

Expansible pulley with speed and torque responsive means

Abstract: A V-belt pulley for a variable speed transmission which may be either the driving or the driven pulley, has the connection between the movable plate of the pulley and a drive member secured to the input or output shaft effected by means of a pivotally connected link which serves to increase or decrease the pulley pressure on the belt as required under various conditions and responds to the input torque and the torque resistance at the output, possibly cooperating with the regulating effect given by centrifugal members and springs acting on the movable pulley. When used in connection with centrifugal members at the input end of the transmission, the arrangement has the advantage of avoiding the machining required in keying the movable pulley to the shaft as well as the resulting rigidity of operation. Alternatively, the arrangement avoids the danger of jamming where the centrifugal members themselves are connected in driving relationship with the movable pulley plate.

Special belt and pulley rim transmission device

Abstract: A belt transmission which uses a crowned pulley with a rim whose peripheral surface has sections with different radii of curvature. The belt fully engages the central section of the peripheral surface but is in less pronounced frictional engagement or totally out of engagement with the outer sections. This reduces the likelihood that the belt would slip off the rim in response to stalling or sudden braking of the pulley or belt. The thickness of the central belt portion exceeds the thickness of the marginal portions to further increase the belt-pulley friction contrast between the central section and the outer sections.

Can seal applier

Abstract: A can seal applier has an indexing mechanism carrying endless belt and pulley sets at four stations. The pulley sets include a pair of movable pulleys that close on opposite sides of the can and wrap the belt around the can to hold the can on the indexing mechanism and rotate the can at a seal wrapping station. A continuous length of seal is fed to a vacuum gripper wheel, and a knife cuts off a length of the seal that is wrapped around the can by the gripper wheel as the can rotates. At another station a gripper draws the free ends of the seal together for joining by a fuser, and at another station the movable pulleys are spread apart to release the can and move it off the indexing mechanism.

Self adjusting pulley mount for traction device

Abstract: A self adjusting pulley mount for traction devices constructed for mounting on a portion of a bed or chair for movement therewith while coordinating with a fixed pulley and weighted cable to afford movement of a sling end of such cable connected to an extremity of a patient under traction whereby the patient may change positions without requiring readjustment or replacement of the traction rig.

Camper support method

Abstract: Elevating and leveling method for campers and other transportable objects in one preferred embodiment including a plurality of telescoping legs, one of which is extended and retracted by power means. A cable is anchored to another telescoping leg and traverses stationary-axis pulleys so that the other leg extends and retracts concurrently with the one leg. In another presently preferred embodiment, a plurality of telescoping legs are mounted upon the transportable object and the extensible portion of each telescopic leg is provided with a pulley near the upper end the fixed portion of each leg is provided with a pulley near the lower end. A cable traverses each pulley and extends between the legs so that when the cable is shortened or displaced out of its normal path, each of the legs will simultaneously extend to uniformly lift the transportable object. Conversely, when the length of the cable is increased or when the cable is allowed to resume its normal path, the legs will simultaneously retract. The method includes jointly extending or retracting telescoping legs by displacing a cable connecting the legs. Alternatively, the method includes power displacing one leg and causing simultaneous displacement of another leg through a connecting cable.

Gaging apparatus with flow control mechanism

Abstract: The illustrated gaging apparatus includes a gaging station having a gaging device which may be employed to check the finished size of work pieces as they are discharged from a grinding machine or some other machine tool. The signals from the gaging device may be employed to adjust the grinding machine so as to hold the size of the work pieces within the desired tolerances, despite the normal wear on the grinding wheel. The gaging apparatus includes a control mechanism for producing a steady flow of the work pieces past the gaging station at a uniform speed so that the accuracy of the gaging operation will not be effected by excessive or non-uniform speed of the work pieces as they are discharged from the grinding machine. The flow control mechanism includes guide means for supporting the work pieces, together with an endless belt for engaging the work pieces and propelling them along the guide means. The belt is threaded around a drive pulley and one or more additional pulleys which are mounted on a swingable supporting arm or carriage. Preferably the arm is swingable in a vertical plane about the axis of the drive pulley. By virtue of this arrangement, the supporting arm and the endless belt are swingable downwardly by gravity so so to maintain the belt in engagement with the work pieces. This mechanism is able to accommodate work pieces of various sizes without any change in the adjustment of the mechanism. The belt assumes control of the work pieces as they are discharged from the grinding machine and positively meters or moves the work pieces at a uniform speed into the gaging station.

Hoisting and towing dolly

Abstract: A vehicle hoisting and towing dolly for towing a disabled vehicle having an improved hoist supporting means which includes an off-set pulley system, the disabled vehicle lifting system comprising a horizontally disposed sling bar connected to a pair of vehicle engaging hoisting slings, the entire sling unit being raised from a central connector with an off-set pulley arrangement. The hoist and disabled vehicle support is mounted on a triangular frame having a pair of larger wheels at the rear of the frame and a guide wheel disposed in front of the frame. The device is attached and towed behind another vehicle with a standard trailer hitch and is utilized for hoisting and towing a disabled vehicle. By providing an off-set pulley lift for the lifting slings as the disabled vehicle is hoisted, the sling bar receives additional mechanical advantage without increasing the complexity of the hoisting mechanism allowing in-line pulley arrangement between the lifting sling pulleys and the support pulleys.

Passenger conveyor system

Abstract: A passenger conveyor system in which the terminal ends of an endless conveyor are hinged for swinging movement of the ends upward The major mechanical components which are located in pits at the ends of the conveyor are mounted on the underside of hinged structural members The balustrades, landing plates and comb plates are mounted on the tops of the structural members Clearance for lifting of the end assemblies is obtained by removing panels from the balustrades In the up position of the terminal ends, the major mechanical components are lifted out of the pits and are accessible for service, repair, removal or replacement The end assemblies are transportable into position for installation by using the pulleys mounted on the underside of the central structural members as supporting wheels Mounting of the major mechanical components such as the driving pulley and belt take-up pulleys at the ends of the endless conveyor spaced from the comb plates makes possible improved control and driving of a belt conveyor without the necessity of a reverse bend in the belt path The same drive is used for the handrail providing synchronization of the handrail and belt An inclined handrail path at the ends provides an increased wraparound of the handrails over the driving pulley with a decreased wraparound at the balustrade newels

Rope pulley hoist with improved holding means

Abstract: A pulley member is rotatably mounted on a frame which is adapted for attachment to a fixed object. The pulley member has an annular groove to receive a rope line. The rope is pressed against the pulley member while it is rotating under a load. A rope stripping means is disposed a spaced distance around the periphery of the pulley member from the pressing means so that an unlimited length of rope may be used with the unit. The pressing means and the stripping means are disposed in fixed relationship with respect to each other and with respect to the pulley member. Ratchet teeth are carried by the pulley member so that it may be driven by a swingable operating lever pivotally mounted on the frame. A feeding pawl is pivoted to the operating lever and engages the ratchet teeth to rotate the pulley member when the operating lever is swung in one direction. A holding pawl is pivotally mounted and resiliently biased toward active engagement with the ratchet teeth.

Tensioning device for wide moving belts

Abstract: A tensioning device for a steel conveyor belt running over a drum or pulley which insures uniform tension over the entire width of the belt to prevent cracking the belt due to concentrated stress. The device comprises hydraulic cylinders, one at either end of the drum axle to adjust tension by moving the drum, and a regulating cylinder acting on the axle in a direction perpendicular to the force of the tensioning cylinders which responds to lateral deflections of the belt and tilts the drum to cause the belt to return to its normal mean position. The tensioning cylinders are connected to a common fluid supply conduit of larger diameter than the conduit connecting to the source of fluid to insure equal pressure in both cylinders in any tilted position.

Emergency fire escape

Abstract: Safety device for evacuating persons from a building comprises box at top of building holding a pulley and an endless cord passing thereover. A door in the bottom of the box is opened by actuation of a remotely controlled latch, whereupon the lower part of the cord drops down so that a loop passing over the pulley at the top and near the ground at the bottom is formed adjacent the building wall. The movement of the cord over the pulley is braked so that a person grasping one length of the loop may travel safely to the ground. Special gripping means may be provided to assist one in grasping the cord.