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Showing papers on "Pulley published in 1978"


Journal ArticleDOI
TL;DR: A technique of pulley reconstruction as employed by Andreas Weilby5 of Denmark is described, which appears to be strong and allows immediate motion.
Abstract: Several methods have been proposed for pulley reconstruction. Cleveland! described the use of a fascia lata graft sutured to either side of the fibrous sheath. Bunnell used a free tendon graft encircling both the flexor and extensor tendons or one slip of the superficialis tendon sutured to the opposite side of the phalanx. 2 Weckesseil passed a tendon graft through a drill hole in the phalanx and encircled the flexor tendon. Wray and Weeks4 reported the use of silicone rubber and Dacron arterial grafts as synthetic substitutes for the fibrous pulley system. Because the methods described do not duplicate the size or number of the original pulleys and require prolonged immobilization of the graft before motion is permitted, a technique of pulley reconstruction as employed by Andreas Weilby5 of Denmark is described. It appears to be strong and allows immediate motion.

111 citations


Patent
09 Nov 1978
TL;DR: In this paper, a floating platform carrying a pulley which is connected through a free-wheel coupling and a speed multiplier to a drive shaft of an electrical generator, on which a flywheel is mounted, is used to convert sea wave energy into electrical energy.
Abstract: A device for converting sea wave energy into electrical energy comprises a floating platform carrying a pulley which is connected through a free-wheel coupling and a speed multiplier to a drive shaft of an electrical generator, on which a flywheel is mounted An anchor cable passes over the pulley and suspends at its free end an immersed counterweight so that vertical motion of the platform in the sea causes rotation of the pulley and drives the generator continuously

37 citations


Patent
05 Jun 1978
TL;DR: In this article, a rotatable pulley or reel is attached to an inverted U-shaped mounting bracket, with a flexible cord attached to and wound around the pulley, whose rotation is retarded or resisted by the strong force or tension of a coiled spring or elastic cord.
Abstract: This invention consists of a rotatable pulley or reel attached to an inverted U-shaped mounting bracket, with a flexible cord attached to and wound around the pulley or reel, whose rotation is retarded or resisted by the strong force or tension of a coiled spring or elastic cord, with a handle of wood or other material attached to the other end of the flexible cord so that when the inverted U-shaped mounting bracket is hooked or fitted in place over the horizontal top of a door or other appropriate support the handle may be pulled downward and away from the pulley or reel in a simulated golf stroke downswing to unwind the flexible cord as it rotates the pulley or reel against the strong force or tension of the retarding or resisting coiled spring or elastic cord that is connected to the pulley or reel. By making many repeated downswings against the strong force of the resistance to the rotation of the pulley or reel all muscles used in driving a golf ball are strained and strengthened, enabling the golfer to drive a golf ball farther when playing on a golf course.

37 citations


Patent
08 Dec 1978
TL;DR: A pulley configuration which increases the contact area between the pulley tooth tips and the land area of the belt teeth is proposed in this paper, where the increased contact area reduces land area wear between belt teeth.
Abstract: A pulley configuration which increases the contact area between the pulley tooth tips and the land area of the belt teeth. The increased contact area reduces land area wear between belt teeth. The pulley tooth tip has a longitudinal cross-sectional contour partially composed of two substantially circular arcs connected by a line segment which is substantially straight or slightly curved. The length of the line segment is from 2 percent to 100 percent of the width of the belt tooth on which the pulley is used, and preferably less than about 7 percent of the width of the belt tooth. The pulley groove depth may be less than the height of the belt tooth and the groove has a longitudinal cross-sectional contour partially composed of two substantially circular arcs connected by a line segment which is substantially straight or slightly curved. The pulley in combination with a toothed belt forms a positive power transmission system.

36 citations


Patent
04 Oct 1978
TL;DR: In this article, an infinitely variable cone pulley transmission arrangement is described, where a loop or belt is arranged around pairs of pulley discs which define a symmetrical pulley wedge.
Abstract: An infinitely variable cone pulley transmission arrangement which includes a loop or belt arranged to revolve around pairs of pulley discs which define a symmetrical pulley wedge Each pair of pulley discs is provided with pressure devices which act through an axially slidable pulley disc The slidable pulley discs are arranged on different sides of the belt or loop The respective pressure devices are arranged on the same first side of the loop or belt with the slidable pulley disc which is located on the other side of the loop or belt being operatively connected to the associated pressure devices by a servo member which runs axially through the adjacent fixed pulley disc

27 citations


Patent
Lester H. Stocker1
08 May 1978
TL;DR: An article turnover assembly for transporting flat envelopes and the like while turning them over 180 degrees includes upper and lower crowned entrance and exit pulleys (22 and 24; 52 and 54) having two flexible endless belts (18 and 20) extending between the lower entrance pulley and the upper exit pulley, and two opposed idler wheels (64 and 66) bias the spans together above the horizontal flat registration plate at about 3/5 of the travel distance through the assembly.
Abstract: An article turnover assembly (16) for transporting flat envelopes and the like while turning them over 180 degrees includes upper and lower crowned entrance and exit pulleys (22 and 24; 52 and 54) having two flexible endless belts (18 and 20) extending between the lower entrance pulley and the upper exit pulley and the upper entrance pulley and the lower exit pulley. The belts are twisted 180 degrees between the entrance and exit pulleys with each having at least one span contiguous to a corresponding span of the other. Registration of envelopes (10) is established at the entrance and is maintained by a horizontal flat registration plate (60) located about half of the travel distance between the entrance and exit pulleys. In addition, two opposed idler wheels (64 and 66) bias the spans together above the horizontal flat registration plate at about 3/5 of the travel distance through the assembly. Contoured stationary plows (84 and 86) are included at a downstream end of the contiguous belt spans to assist in turning the envelopes over.

24 citations


Patent
05 Apr 1978
TL;DR: A wire-feeding mechanism comprises a rotatably mounted pulley formed on its edge with a continuous circumferential groove and plural rollers arranged to hold an endless flexible belt against a segment of the edge of the pulley as mentioned in this paper.
Abstract: A wire-feeding mechanism comprises a rotatably mounted pulley formed on its edge with a continuous circumferential groove and plural rollers arranged to hold an endless flexible belt against a segment of the edge of the pulley. The belt thus is adapted to hold the wire in the groove as one roller is driven.

22 citations


Patent
16 May 1978
TL;DR: In this article, the first and second guide pulleys are mounted at opposite ends in tandem relationship in a rigid frame to provide an indication of the tension in a rope or cable.
Abstract: The device provides an indication of the tension in a rope or cable and includes a rigid frame mounting first and second guide pulleys at opposite ends in tandem relationship. A central pulley is provided in the frame and the rope or cable is passed under the first guide pulley, over the central pulley and thence under the second guide pulley. The entrance and exit angle of the rope or cable over the central pulley is an angle less than 180° so that when a tension is placed on the rope, a downward force is exerted on the central pulley which force in turn is measured by a load cell to provide an indication of the tension in the rope. A manually operable locking and releasing structure cooperates with the mounting means for the first and second guide pulleys in such a manner as to enable simple manual removal of the guide pulleys from the frame so that the rope or cable can be positioned in the device without having access to the ends of the rope.

19 citations


Patent
06 Jul 1978
TL;DR: In this paper, a tandem-belt variable-speed transmission has a pair of shafts each provided with a set of outer disks flanking an intermediate disk forming therewith a pair nips each receiving a respective belt, and the intermediate disk of each pulley is rotationally coupled to one of the respective outer disks and is axially displaceable relative to both disks.
Abstract: A tandem-belt variable-speed transmission has a pair of shafts each provided with a pair of outer disks flanking an intermediate disk forming therewith a pair of nips each receiving a respective belt. One of each of the outer disks is fixed on the shaft and the other outer disk is axially displaceable on the shaft. The intermediate disk of each pulley is rotationally coupled to one of the respective outer disks and is axially displaceable relative to both disks. An adjustment member is rotationally fixed but axially shiftable on one of the shafts and is connected via a link to the movable disk of the other shaft for varying the pitch of the pulleys. A pressure element and a formation on the movable member of the one shaft and on the adjustment member rotationally couple this movable member to the one shaft.

19 citations


Patent
06 Nov 1978
TL;DR: In this paper, an annular disc is mounted on a V-grooved pulley member and a ring bearing is fitted in the sized central openings of the discs and pulley base generally simultaneously with the sizing stroke.
Abstract: A clutch housing and pulley assembly is formed from a plurality of stamped metal components. A plurality of annular discs are mounted on a radially extending base of a V-grooved pulley member. A cup-shaped clutch housing having a radially extending base is mounted in abutting relationship with one of the outer discs on one side of the pulley base. A plurality of rivets extend through axially aligned holes formed in the pulley base, discs and housing base to assemble these components into a single unit. A ring bearing is telescopically mounted in the axially aligned central openings of the discs and pulley base for rotatably mounting the clutch housing and pulley assembly on a drive shaft which is adapted to extend through a central opening of the clutch housing base. The pulley member and discs are arranged in a stacked relationship on a plurality of guide pins extending through the rivet receiving holes. A metal sizing punch or broach having the bearing ring mounted thereon then is passed through the aligned central openings of the discs and pulley base to accurately size the central openings in a single stroke. The bearing ring is press fitted in the sized central openings of the discs and pulley base generally simultaneously with the sizing stroke. The cup-shaped housing then is mounted on the disc reinforced pulley and bearing subassembly by rivets which clamp the assembled components together for subsequent mounting on a drive shaft which telescopically extends through the inner race of the bearing ring.

18 citations


Patent
26 Oct 1978
TL;DR: In this paper, an apparatus for testing a power transmission belt is described, where a test belt is mounted between a pair of pulleys secured to first and second ends of a set of shafts disposed in parallel.
Abstract: An apparatus for testing a power transmission belt is disclosed, wherein a test belt is mounted between a pair ot pulleys secured to first ends, respectively, of a pair of shafts disposed in parallel and a drive belt is mounted, through idlers, between another pair of pulleys respectively secured to the other ends of the shafts. One of the shafts is supported on a movable plate adapted to be moved in conformity with the length of the test belt. Pitch diameters of these pulleys are determined to exert torque on the shafts to thereby apply tension to the belts. The idlers are disposed so as to avoid displacement of the drive belt regardless of the length of the test belt, and one of the idlers is movably disposed to further control tension of the drive belt.

Patent
27 Apr 1978
TL;DR: A pulley including a cup-shaped hub having a cylindrical sidewall provided with a radially extending annular, multiple wall thickness fold at the axially inner end of the hub and a belt retaining ring mounted on said sidewall adjacent, and projecting radially outwardly beyond, is described in this paper.
Abstract: A pulley including a cup-shaped hub having a cylindrical sidewall provided with a radially extending annular, multiple wall thickness fold at the axially inner end thereof, a radially outwardly flaring belt retaining flange at the axially outer end thereof, and a belt retaining ring mounted on said sidewall adjacent, and projecting radially outwardly beyond, the fold. One aspect of the invention comprises the method of making the pulley including the step of mounting the belt retaining ring prior to the step of forming the axially inner, multiple wall thickness fold.

Patent
30 Mar 1978
TL;DR: In this paper, it is proposed to constantly maintain the taut state of the cable by placing the shaft of the pulley parallel to itself and connecting it with the plunger rod of a plunger cylinder provided with an accumulator.
Abstract: A device for lowering a load for example a diving bell from a vessel from a spot above the water line to a spot beneath the water line, comprising a winch and a cable connected with the load and moved by said winch along at least one cable pulley rotatable about a shaft. In order to prevent that the cable becomes alternately slack and taut during contact of the load with the water, it is proposed to constantly maintain the taut state of the cable by placing the shaft of the pulley parallel to itself and connecting it with the plunger rod of a plunger cylinder provided with an accumulator.

Patent
30 May 1978
TL;DR: In this paper, a power transmission device for a power-operated lawn mower of a type, in which a driving pulley and a driven pulley are respectively fitted fixedly and rotatably on a power output shaft of a prime mover such as an internal combustion engine, an electric motor, and so forth, is presented.
Abstract: A power transmission device for a power-operated lawn mower of a type, in which a driving pulley and a driven pulley are respectively fitted fixedly and rotatably on a power output shaft of a prime mover such as an internal combustion engine, an electric motor, and so forth, another driven pulley is rotatably fitted on a separate shaft disposed in parallel with the output shaft, a cutting blade is fastened to the first-mentioned driven pulley rotatably fitted on the output shaft as an integral part thereof, a first drive belt is loosely extended between the driving pulley and the second-mentioned driven pulley, a second drive belt is tightly extended between the first and second-mentioned driven pulleys, a tension pulley is further provided on a swingable supporting arm to impart tension to the loosely extended belt when the cutting blade is to be rotated for lawn mowing, and a brake applying implement is provided on one part of the swingable supporting arm to apply frictional braking force to the second-mentioned driven pulley when the cutting blade is to be stopped. The tension-imparting and brake-applying operations to the loosely extended drive belt and the second driven pulley, respectively, are effected by an operator through gripping and releasing of a control lever provided at a position of a handle connected to the swingable supporting arm by a cord or wire.

Patent
13 Mar 1978
TL;DR: In this paper, the pulley consists of a plurality of helically disposed webs spiralled about a rotatable shaft, and each set is spiralled in an opposite direction to move foreign matter received between the webs in a self-cleaning manner.
Abstract: The invention pertains to a pulley for belt conveyors, particularly belt conveyors used in the conveying of stones, gravel, and the like wherein the pulley structure is self-cleaning of foreign matter received within the confines of the pulley to prevent belt damage. The pulley consists of a plurality of helically disposed webs spiralled about a rotatable shaft. A plurality of webs are defined upon the shaft on each side of the pulley central region wherein at least two separate webs define a set of multiple pitch helices, and each set is spiralled about the axis of rotation in an opposite direction wherein foreign matter received between the webs is moved to the pulley ends in a self-cleaning manner. A disc is utilized at the pulley central region to which the inner ends of the web sets are affixed and the periphery of the webs is of a greater axial dimension than the web plate to increase the belt surface loading area. The use of a plurality of helices in each web set increases the locations of belt engagement and support without detracting from the self-cleaning function.

Patent
21 Aug 1978
TL;DR: In this article, a speed changing unit for use on a model aircraft or powered foot-launched aircraft is described. But this unit is adapted to be mounted on the frame of an aircraft and a propeller is mounted directly on this other pulley for rotation therewith when driven by the engine drive shaft and belt.
Abstract: A speed changing unit preferably for use on a model aircraft or powered foot-launched aircraft. A usual engine is mounted on a frame which in turn is adapted to be mounted on the frame of an aircraft. A pair of pulleys are mounted on the frame in a spaced relationship with a drive belt drivingly interconnecting the pulleys. One of the pulleys is mounted on the drive shaft of the engine for positive rotation with the drive shaft. The other pulley is rotatably mounted on a stationary eccentric shaft which is adjustably mounted on the frame. A propeller is mounted directly on this other pulley for rotation therewith when driven by the engine drive shaft and belt. Manual rotation of the eccentric shaft within its mounting adjusts the spacing between the spaced pulleys permitting different size drive shaft pulleys to be used with a standard drive belt to achieve different propeller speeds and thrust characteristics for a particular aircraft.

Journal ArticleDOI
TL;DR: In this paper, the load distribution of a toothed belt whose pitch is different from that of pulley is discussed theoretically and experimentally, and the effectiveness of the theoretical prediction on load distribution is proved by the experimental results.
Abstract: In this paper, the load distribution of toothed belt whose pitch is different from that of pulley is discussed theoretically and experimentally From this study the following conclusions have been obtained : 1) The pitch difference exerts an important influence on the load distribution, so the most suitable pitch difference should be chosen in consideration of the transmissive load, the modulus of elasticity of the belt, the compliance of the bled tooth, the coefficient of friction between belt and pulley 2) The effectiveness of the theoretical prediction on load distribution is proved by the experimental results

Patent
24 May 1978
TL;DR: A stepless variable speed drive with an endless belt connecting two pulleys has both pulleys in two halves with curved contact faces (22, 24) which can be moved apart to give a smaller pitch circle dia as mentioned in this paper.
Abstract: A stepless variable speed drive with an endless belt (12) connecting two pulleys has both pulleys in two halves (e.g. 11, 24) with curved contact faces (22, 24) which can be moved apart to give a smaller pitch circle dia. in the conventional manner. One pulley half (24) is also the cylinder (23) of a multi-piston hydraulic operating system. This cylinder houses two pistons (30, 37) which form two main chambers (35, 44). Two partitions (28, 40) which alternate with the pistons also form buffer chambers (36, 45). They are each selectively connected with atmosphere through channels (50, 51) which interact with hydraulic fluid supply channels (46, 47, 49) through the hollow spindle (21) projecting from the fixed pulley half (11) and on which slides the combined pulley and cylinder.

Patent
03 Feb 1978
TL;DR: In this paper, a grain husker has two decorticating rollers which are accommodated in a housing, one of the rollers being rotatable about a stationary axis, while the other roller is mounted on a carrier which, in turn, pivoting relative to the housing in such a manner that the movable roller moves with the carrier closer and farther away from the stationary axis of the first one.
Abstract: A grain husker has two decorticating rollers which are accommodated in a housing, one of the rollers being rotatable about a stationary axis, while the other roller is mounted on a carrier which, in turn, is mounted on the housing for pivoting relative thereto in such a manner that the movable roller moves with the carrier closer and farther away from the stationary axis of the first-mentioned roller. A drive for the rollers includes a motor, a driving pulley mounted on the output shaft of the motor, and idler pulley and a driven pulley of the movable roller, all of these components being also mounted on the carrier for displacement therewith, the drive further including a driven pulley of the stationarily mounted roller and an endless element which is trained about all of the above-mentioned pulleys. The driving and idler pulleys, as well as the driven pulley of the movable roller are located in the corners of an imaginary triangle, while the driven pulley of the stationarily mounted roller is located within the imaginary triangle so that the required length of the endless element will always be the same irrespective of the amount of displacement of the movable roller with the carrier within the working range thereof. Thus, as the decorticating rollers wear off, the movable roller will move closer to the stationary axis due to the weight of the components mounted on the carrier or acting thereon, and there is no need for retensioning the endless element during the movement of the movable roller within its working range.

Patent
02 Oct 1978
TL;DR: In this article, a belt drive for a right side discharge mower mounted on a tractor having a rear, clockwise turning power take off shaft is provided with an endless belt drive.
Abstract: A right side discharge mower mounted on a tractor having a rear, clockwise-turning power take off shaft is provided with a belt drive including a drive pulley on the power take off shaft, a pair of upper idlers above the drive pulley, a pair of lower idlers below the drive pulley and an endless belt entrained about the lower side of the drive pulley and having its advance and return runs extending upwardly around the upper idlers, downwardly rearward of the drive pulley to the lower idlers, and forwardly to loop around the clockwise-turning mower input pulley.

Patent
09 Jan 1978
TL;DR: In this paper, a fabric workpiece removal mechanism is described, which includes a pair of spaced apart pulley wheels, a continuous drive belt of resilient material entrained about the wheels, and a switch actuated motor for intermittently driving the wheels and the belt.
Abstract: A fabric workpiece removal mechanism which includes a pair of spaced apart pulley wheels, a continuous drive belt of resilient material entrained about the wheels, a switch actuated motor for intermittently driving the wheels and the belt, at least one gripper finger clamped to the belt for clasping the edge of a fabric workpiece against the belt, the gripper finger being bent inwardly toward the belt to deform the belt from its natural configuration and a sensor switch for detecting the presence of the fabric workpiece edge between the gripper finger and the belt and for then energizing the belt drive motor.

Patent
16 Aug 1978
TL;DR: In this paper, a locking device is used for releasably connecting the submersible device to the traveller, which is then disconnected from the traveller and lowered further into the water at the cable unwinding speed so as to eliminate the effect of the pulley block.
Abstract: Apparatus for handling a submersible device, such as a diving bell, includes a winch mounted on a support structure and having a suspension cable with a free end at which the submersible device is suspended, a guide structure fixed to the support structure and having two guidance ramps, each having a portion thereof extending below a water surface, a traveller having two parallel side members with a guidance device thereon which slidably cooperates with the two guidance ramps, a pulley back including two upper pulleys secured to the guide structure and a movable lower pulley fixed to the traveller with the suspension cable passing over the upper and lower pulleys so as to form n strands, and a locking device for releasably connecting the submersible device to the traveller. The submersible device is lowered into the water with the traveller at a slow speed equal to the unwinding speed of the cable from the winch divided by the number of strands n formed by the pulley block until the submersible device completely passes the air-water interface and is then disconnected from the traveller and lowered further into the water at the cable unwinding speed so as to eliminate the effect of the pulley block. The reverse operation is used for raising the submersible device out of the water.

Patent
23 Oct 1978
TL;DR: In this article, a high-speed power tool has a housing for an electromotor and a tool casing mounted on the motor housing, and a finishing plate is attached to the tool casing for movement relative to the motor.
Abstract: A high-speed power tool has a housing for an electromotor, and a tool casing mounted on the motor housing. A finishing plate is mounted on the tool casing for movement relative thereto. The motor drives a transmission which includes a crank member having an eccentric portion connected to the finishing plate for imparting oscillatory motion to the latter. The arrangement for connecting the eccentric portion of the crank member to the finishing plate includes a bearing mounted on the eccentric portion of the crank member, and a sleeve surrounding the bearing and detachably connected to the finishing plate. Screws which are accessible from the exterior of the tool casing and of the finishing plate connect the sleeve to the finishing plate. The transmission includes two pulleys mounted on the output shaft of the electromotor and on the crank member, respectively, the pulley on the output shaft being bipartite, the two parts of the pulley being spaced by an interchangeable washer and urged toward one another by a screw so that tension of a V-belt trained about the pulleys can be adjusted.

Patent
22 May 1978
TL;DR: In this article, pressure sensitive instruments at spaced locations in the main supply duct are connected by electrical wiring or pneumatic tubing to a comparing instrument which senses pressure signals from the different zones determining the maximum required pressure that must be supplied to the system.
Abstract: A forced air heating and/or cooling system in a building is provided with the usual main supply conduits or duct which have various branch ducts leading to different areas of the building. Pressure sensitive instruments at spaced locations in the main supply duct are connected by electrical wiring or pneumatic tubing to a comparing instrument which senses pressure signals from the different zones determining the maximum required pressure that must be supplied to the system. Zone thermostats sense increases in room temperature and operate conventional variable volume boxes to increase the supply of air thereby lowering the air pressure. The comparing instrument sends a signal to a variable speed drive comprising a motor having a spring loaded pulley connected by a drive belt to a fan pulley and the motor is electrically driven by a separate drive means to adjust the tension on the spring loaded pulley thereby changing the speed of the fan for a more economical operation.

Patent
15 Dec 1978
TL;DR: In this article, the position of a cable used in a lifting or similar machine is checked w.r.t. by a guide pulley to ensure that the cable is correctly positioned.
Abstract: The position of a cable used in a lifting or similar machine is checked w.r.t. a guide pulley to ensure that the cable is correctly positioned. A probe operated by pulley movement signals derailment of cable. A cable (1) is guided by pulleys (102) and guide plates (106) fixed to pulley mounting (103) prevent derailment. A central hole (104) enables the pulleys to act as balancing assembly. One pulley (102) is mounted on cylindrical support with radial collar (5) to enable sliding w.r.t. the other pulley (102'). A shaft (7) contacts a blade spring (9) operating against pins (16) to keep pulley in contact with cable. A detector (20) signals when no load is applied to pulley thus signalling a derailment.

Patent
Sagara Seiji1, Hiroyuki Hattori1, Hirotoshi Kishi1, Hiroshi Ogawa1, Kazumi Umezawa1 
04 Jan 1978
TL;DR: In this paper, the first and second mirrors are moved in the same direction at the same velocity at a velocity rate of 1:1/2 by a guide rail and a particular arrangement of pulleys to move the mirrors.
Abstract: Apparatus for scanning an original in a copying machine herein disclosed is of the type in which first and second mirrors are moved in the same direction at the velocity rate of 1:1/2. The apparatus comprises first and second carriages for supporting and carrying the first and second mirrors respectively, a guide rail for supporting the carriages movably in the direction of their movement and a particular arrangement of pulleys to move the mirrors. The arrangement comprises first and second movable pulleys provided on the second carriage and spaced from one another and first and second stationary pulleys. The first stationary pulley is positioned on the side of the second movable pulley relative to the first movable one whereas the second stationary pulley is positioned on the side of the first movable pulley relative to the second one. A wire extends over passing around these pulleys, with its one end being fastened to a stationary part of the apparatus after being passed around the first stationary pulley and then around the first movable pulley. The other end part turned back around the second stationary pulley extends to the second movable pulley where it turns back around the pulley and then its end is finally fastened to a stationary part of the apparatus. At the segment of the pulley wire extending between the first stationary pulley and the first movable pulley, the first carriage is fixedly connected with the wire so as to cause the first and second mirrors to move with the movement of the wire.

Patent
16 Oct 1978
TL;DR: In this article, a bicycle rear derailleur is described, which comprises a first shaft on which a guide pulley guard is pivotally mounted and resiliently urged in one direction.
Abstract: A bicycle rear derailleur which comprises a first shaft on which a guide pulley guard is pivotally mounted and resiliently urged in one direction, a second shaft supported by the guide pulley guard, an inner pulley rotatably mounted on the second shaft, a guide pulley rotatably mounted on the inner pulley, a tension link mounted at its upper end to the second shaft so as to be coaxially movable with the inner pulley and resiliently urged so as to be swingable in one direction, a tension pulley rotatably mounted on a third shaft which is supported by the tension link and a tension pulley guard.

Patent
Svetislav Mitrovich1
10 Jul 1978
TL;DR: In this paper, a high-speed printer is coupled to a servo controlled driving motor having intermittent motion, which drives a helically grooved pulley, which has attached to it left and right cable segments, and the other ends of the cable segments are attached to the movable carriage.
Abstract: A high-speed printer in which the carriage carrying a print wheel is coupled to a servo controlled driving motor having intermittent motion. The motor drives a helically grooved pulley, which has attached to it left and right cable segments. The other ends of the cable segments are attached to the movable carriage. A cable preload spring and friction pulley snubber combination maintains cable tension relatively constant. The snubber provides a tight cable system during normal carriage acceleration and deceleration. The preload spring allows for tension correction when the cable suffers from long-term stretching due to constructional stretching, that is, the normal tendency of wound cables to stretch due to seating of individual wires in the strand.

Patent
12 Jan 1978
TL;DR: In this article, the inner surface of a net belt is suspended in contact with a face lattice and magnet pulleys to restrict the tension of the belt upon rotation so as to mount the net belt of thin layer.
Abstract: PURPOSE:To intend to smoothly rotate a not conveyor of endless net belt by suspending the inner surface of the belt in contact with a face lattice and magnet pulleys to restrict the tension of the belt upon rotation so as mount the net belt of thin layer.

Patent
20 Apr 1978
TL;DR: An electrically operated auxiliary unit for driving a bicycle constructed to be attached to the bicycle frame and, by means of driving engagement created by the weight of the drive motor along a lever arm, propel the bicycle with a drive pulley as discussed by the authors.
Abstract: An electrically operated auxiliary unit for driving a bicycle constructed to be attached to the bicycle frame and, by means of driving engagement created by the weight of the drive motor along a lever arm, propel the bicycle with a drive pulley. The unit includes a motor support frame including a horizontal bar located at one side at the top of the rear wheel of the bicycle and which is attached to the bicycle frame. A horizontal arm, pivotally mounted on the horizontal bar, extends tranversely over the rear wheel. A motor is mounted upon the horizontal arm with the center of gravity of the motor located on the opposite side of the wheel from the location of the horizontal bar. The horizontal arm acts as the lever arm, and driving engagement is created between the drive pulley and the wheel of the cycle by the weight of the motor.