Showing papers on "Pulley published in 1969"

Infinitely variable cone-pulley transmission

Abstract: A cone pulley transmission is disclosed which includes an infinitely actuatable and adjustable transmission wherein an axially displaceable cone pulley disc is adjustable by application of hydraulic tensioning so as to generate the pressure forces acting on a transmission belt rotating between the cone pulley discs, with the tensioning being controlled by a pressure medium through a sliding control valve. The tensioning is provided by different sized pressure chargeable surfaces and is throttled to different degrees with respect to the associated outlet of the sliding control valve. In this connection, it is provided that at least one outlet can be changed as a function of certain parameters.

Sway control for trailer hitch

Abstract: A sway control for a trailer mounted on trailer tongue between the trailer and the towing vehicle utilizing cable means and a drum friction clutch utilizing pivotal means for interconnection between the vehicles. In combination with the clutch, the invention comprises idler pulleys spaced from said clutch and over which cables of the invention project, and means for releasably pivoting at least one of the pulleys to slack the cable in order to permit detachment of the ends of the cable from added structure to the towing vehicle; said invention also comprising novel details of the drum and the manner in which the opposite portions of the cables are substantially contiguous with each other at the periphery of the drum and extending in opposite directions toward the idler pulleys; said opposite portions of said cable wound helically around said drum in opposite directions and toward opposite ends of said drum from a location of said cable portions where they are contiguous with each other such that said opposite portions may reciprocate with each other and always be very close to axial alignment with each other as they extend in opposite directions to said idler pulleys. Said idler pulleys are positioned on a mounting bar or brackets so as to be in close vertical alignment with the cables as they extend outwardly at the point where they are contiguous.

Drive for roller conveyors

Abstract: A drive for a live-roller conveyor system is described in which individual rollers are driven from a powered cross-shaft through an elastomeric belt having a circular cross-section. A spool-shaped sliding pulley is provided for one shaft which floats axially to seek its optimum driving position, with the spool preferably being in the shape of a hyperboloid of revolution, broken at its center striction line with the end sections spaced apart by a cylindrical portion of a length sufficient to accommodate the helical wrap of the driving band.

Brake for roller conveyors

Abstract: A selectively operable brake for roller conveyors is described in which each roller is connected to a pulley beneath the pass line by a tensioned resilient drive belt and the pulleys are selectively stopped by interposing a sprag. The pulleys may either be positively arrested or allowed to frictionally slip for braking. Interposition of the sprag is controlled by means which permit the device to function as an accumulation conveyor while permitting accumulated objects to be released individually or in groups. The device is usable as a powered live-roller accumulation conveyor or without power as a gravity conveyor.

Ball projecting machine with direction control mechanism

Abstract: A baseball-pitching machine having two horizontal, oppositely rotating wheels for engaging a baseball and pitching it to a batter. The wheels are driven through variable drive pulleys, and to curve the ball, the pulleys are adjusted to rotate one wheel faster than the other. To vary the speed of the ball being pitched the motor bracket is adjustable to be shifted toward or away from the wheels. The direction of throw, both horizontal and vertical, are controlled by manually operated levers connected to pivotally mounted platforms. The machine is mounted on a portable stand which is exceptionally stable.

Transmission including toothed belt and partially toothed pulley

Abstract: A transmission is provided including two pulley wheels which re coupled by a toothed belt. One of the pulleys has teeth along the complete periphery thereof, and the other pulley has groups of teeth positioned in spaced relation along the periphery thereof. When the belt is loose, the teeth of the belt are disengaged from the teeth of the other pulley by the stiffness of the belt, permitting slipping of the belt with respect to the other pulley. When the belt is tight, the belt conforms itself to the periphery of the other pulley, whereby the teeth of the belt mesh with the teeth of the pulley providing a positive drive.

Motorized golf cart

Abstract: Wheeled cart carries one-way electric motor, battery for energizing motor, and one-way transmission for driving wheels. Transmission includes belt loosely trained about pulleys, and a roller engageable with belt to make it taut so that it transmits motion from motor to wheels; disengagement of roller from belt allows cart to be rolled backwardly. Handle includes two telescoping parts, inner part being connected to a rheostat which controls amount of current supplied to motor. Pulling force on outer end of handle determines setting of rheostat and speed of motor.

Conveyor system for viscous or cementitious material

Abstract: An adaptable, flexible conveyor system is provided which employs material carrying continuous belt pick-up, conveyor-transfer and turret sections. The conveyor sections are at their adjacent ends positioned in a forwardly and backwardly movably supported and horizontally-pivoted relation with respect to each other and with respect to a pick-up and to a turret section from whose continuous conveyor, cementitious, grout or somewhat viscous material is delivered to a work area. The turret section and the head end of a transfer section with which it cooperates to receive material therefrom are both mounted for forward and backward movement on a longitudinally-extending elevated track. A transfer assembly is pivotally-carried between the forward end of one conveyor section and the tail end of a cooperating conveyor section to which the material is to be delivered, and a scraper assembly is carried by the forward end of the one conveyor section within the transfer assembly for removing adhering material from the belt adjacent a head pulley. A combination scraper means is provided for cleaning an underside of a belt and the exposed side of a drive pulley at the tail end of each conveyor section which has its own individual drive unit that is mounted to facilitate adjustment of belt tension and replacement of the belt.

Automatic circular winding and releasing belt conveyor

Abstract: A belt conveyor or the like carries the object to be forwarded on the belt surface by means of a mechanically operated pulley provided with an electric motor as a motive power. The belt conveyor prevents scattering of lightweight powder or grains due to wind at the time of their conveyance, and at the same time, it prevents water leakage due to rain and snow, and also enables a steep slope conveyance as well as an entirely new and progressive plane detour wherein the belt automatically takes the form of a cylinder as to envelop the object to be carried.

Curved powered roller conveyor

Abstract: A curved live roller conveyor is described in which a plurality of individual live rollers disposed at angles about the center of conveyor curvature are driven from a common powered drive shaft through a system of pulleys and elastomeric belts. Straight or tapered rollers are used, with pulley diameters being varied to provide constant rotational speed for each driven roller.

Film movement equalizing device for a motion picture sound projector

Abstract: A shutter shaft operates film advance means for moving the film past a film gate, and has two pulleys, of different diameters, secured thereto in juxtaposed relation. The pulleys are beltdriven from a small drive pulley on the output shaft of an electric motor, and a solenoid-operated shifter is engaged with the belt to shift the latter between the two differing diameter pulleys. When the belt is engaged with the smaller diameter pulley, the shutter shaft is rotated at 0.5 r.p.m. higher than the average r.p.m. and, when the belt is engaged with the larger diameter pulley, the shutter shaft is rotated at 0.5 r.p.m. lower than the average r.p.m. The motor output shaft contains a drive pulley connected by a belt drive to a flywheel driving a capstan for advancing the film through a sound reproducing section. A film loop is formed between the film gate and the sound reproducing section and a loop size detector is pivotally mounted to engage the film loop. The detector includes an obturator positioned to control the light incident upon a photoelectric transducer in accordance with the size of the film loop. The solenoid operating the belt shifter is controlled by an electric circuit including the photoelectric transducer. In one embodiment, the film may be advanced past a film gate in either a normal direction or a reverse direction, and the loop size detector is conditioned to operate with both directions of film advance, by cam means associated with a shaft controlling a switch which, in turn, controls the direction of operation of the film-driving motor.

Conveying apparatus and method

Abstract: An endless conveyor belt is carried by driving and driven pulleys having belt-engaging peripheries comprising, alternately, planar and curved surfaces. Flexure of a seam of the belt and consequent breakage of the belt is avoided by causing the belt in the vicinity of the seam to be engaged by one of the planar surfaces.

Combination seat belt and shoulder harness for automotive vehicles and the like

Abstract: This invention consists of an ordinary seat belt embodying two straps that are buckled together over the lap of a person sitting in the seat of an automotive vehicle or the like; and a shoulder harness having one end riveted or otherwise secured to one of the aforesaid straps of the seat belt. The shoulder harness passes upward, around and down over a rotatably mounted pulley that is in the lower end of a pulley support. The aforesaid pulley support is swingably secured to a toggle bracket which is riveted or otherwise fastened to the underside of the roof of an automotive vehicle or the like. The rear and lower end of the aforesaid shoulder harness is now secured to a retrieving and storing pulley, after passing over the aforesaid pulley as previously stated, the retrieving and storing pulley being secured to the upper end of a vertically disposed strap that has its lower end firmly secured to the body of the aforesaid automotive vehicle or the like.

Variable speed drive mechanism

Abstract: Mechanism for obtaining variable speed in driving a tractor or the like in which the driving is done through belts reeved on a motor-driven pulley and a wheel-driving pulley through the intermediary of a variable-speed sheave assembly about which the belts are reeved, and a variation in drive ratio is obtained by shifting the spacing of the axis of the sheave assembly relative to the axes, respectively, of the motor-driven pulley and wheeldriving pulley, the mechanism including means for discontinuing the driving engagement of a belt to one of the pulleys and for actuating a braking device in the same operation of discontinuing the driving operation.

Portable grinding tool

Abstract: A portable grinding tool consisting of a handle, a telescopic holder and arm having a rotatable pulley attached to one end. The telescopic holder is adjustably fastened to the handle at variable angles, and a rotatable driving member positioned within the holder is adapted to be driven by suitable power means so as to rotate a grinding belt entrained about and interconnecting the driving member and the rotatable pulley. Pressure plates for the belt and pulleys of various configurations may be interchangeably mounted for the effective and accurate grinding of different surfaces of a wide range of objects.

Adjustable angulated conveyor system in which holddown rollers are employed to secure a ridged belt to channeled pulleys

Abstract: An angulated conveyor system is described in which a ridged conveyor belt is securely supported on channeled pulleys by holddown rollers The frame of the conveyor is formed in a plurality of sections The sections are pivotally connected to allow angular adjustment A separate endless drive chain is provided in each section to permit angular adjustment without adjusting the tension on the chains

Hydrostatic transmission with freewheel drive

Abstract: The drive system of the present application has particular utility in connection with a small vehicle, such as a garden tractor, and the propelling wheels of the vehicle are powered through a system including a belt-driven hydrostatic transmission and a gear reducer, with one-way clutch means being connected between the pulley drive system and the input shaft of the hydrostatic transmission. The one-way clutch means allows the hydrostatic transmission to transmit power to the propelling means in forward and reverse directions when the prime mover is actuated, and when the prime mover is not actuated, the one-way clutch means allows the vehicle to be moved when the control of the transmission is placed in forward or reverse directions, since the input shaft of the transmission is free to rotate in one direction relative to the belt drive system.

Tensile loading apparatus for moving wire

Abstract: Apparatus for testing the tensile strength of moving wire without subjecting wire at the supply coil or other source to high tension, comprising a main pulley with two grooves and a free pulley biased away from the main pulley for leading wire in a loop from one main pulley groove to the other. Guides for guiding wire to and away from the main pulley assure a 180* wire wrap about each main pulley groove. This permits a high-testing tension to exist in the loop that extends about the free pulley, while only a low tension exists prior to entering on the main pulley and after leaving it.

Improvements in Exercising Apparatus

Abstract: 1,151,656. Exercising apparatus. W. HUNTER. 2 April, 1968 [13 April, 1967], No. 17088/67. Heading A6M. An exercising apparatus, in which a load is raised or lowered by the user pulling on or releasing a rope, consists of a frame having a base plate 10 and a top plate 11 connected by three upright rods 12, 13, 14. Four pulleys 15, 16, A17, 18 are mounted with their axes cutting and perpendicular to the apices of a quadrilateral figure. Pulleys 15 and 16 are mounted respectively below and above the top plate, and pulleys 17 and 18 are mounted below the base plate which is supported by four studs (20) attached to the plate 19. A collar 23, mounted on rod 14, carries a bracket 24, which forms an anchorage for one end of the rope, and also carries a pulley 26 through which the rope passes. The rope passes from its anchorage point round pulleys 18, 17 and 15 and then round the floating pulley 33, which carries the load. The rope continues round pulley 16 and 26 and terminates at the handle 35. Between pulley 26 and the handle, the rape passes through a block 36 which can be locked onto the rope in any desired position and will abut against the bracket 25 to limit the depth to which the floating pulley may fall. The collar 23 may be slid along rod 14 and locked in any desired position. Suspended from the floating pulley 33 there is provided a carrier 41 which has forked ends 42 loosely engaging with the uprights 12 and 13, which thus guide the carrier, and prevent it rotating. Weights may be added to the carrier to adjust the load of the floating pulley.

Portable band saw

Abstract: A portable band saw device including a frame supporting a prime mover which drives a first pulley, a second pulley being supported on an arm pivotally connected to the frame so that said second pulley is movable relatively toward and away from the driven pulley against the resistance of a spring, the band saw blade being extended around the two pulleys and guided by arrangements on one side of the frame, while a guard on the opposite side prevents inadvertent cutting at that location, both pulleys having provisions for adjustments of their axes of rotation, including an arrangement for tilting the arm carrying the second pulley

Passenger conveyor system

Abstract: A passenger conveyor system having a single endless conveyor belt for moving passengers in opposite directions. Horizontal guide pulleys are located at the ends of each line of conveyor travel, and a rotary-driven drum is mounted in an underground pit between each end pair of guide pulleys. The conveyor belt has a low-friction reverse surface mounted on a low-friction supporting surface which extends between the ends of the conveyor. The conveyor belt is looped around each rotary drum so that its upper high-friction tread surface engages the drums, thereby enabling the belt to be driven effectively. An upright, vertically oriented rotary drum overlaps the end of each conveyor to urge passengers to move laterally from the belt before it enters the pit and to prevent objects from jamming the belt drive system.

Apparatus for supporting the pulley of the belt grinder

Abstract: THE PRESENT INVENTION RELATES TO A SUPPORT FOR A PULLEY AND MORE PARTICULARLY TO A SUPPORT FOR A PULLEY OF THE BELT GRINDER, THE ATTACHMENT ANGLE OF WHICH IS FREELY CONTROLLED AND THE TENSION OF THE GRINDING BELT CAN BE KEPT UNIFORM.

Load responsive gripping device for flexible cable drives and the like

Abstract: A DEVICE FOR DRIVING A FLEXIBLE CABLE, ROPE, BELT, OR THE LIKE, AND GRIPPING THE SAME WITH A PRESSURE PROPORTIONALLY RELATED TO THE PULLING FORCE OF THE LOAD IMPOSED THEREON, HAVING A ROTATABLE DRIVING PULLEY AND ROTATABLE PRESSURE APPLYING ROLLER, THE PULLEY AND ROLLER BEING MOUNTED FOR RELATIVE POSITIONAL SHIFTING MOVEMENT, AND, A LEVER ENGAGEABLE BY THE CABLE AND RESPONSIVE TO THE LOAD OF THE PULLING FORCE THEREON TO CAUSE THE PRESSURE ROLLER TO BEAR AGAINST THE CABLE WITH A FORCE PROPORTIONAL RELATED TO THE PULLING LOAD. THE DEVICE MAY BE USED, FOR EXAMPLE, AS A SIMPLIFIED AND EFFICIENT DRIVING MEANS FOR A PORTABLE ROPE SKI TOW.

Transportable camera pedestal

Abstract: A wheeled base carries extendible column members related to each other via pulley wheel and cable apparatus for supporting a load at a preselectible height. Multiple telescoping tubes are provided with internal gas pressure for applying a force against one of the column members in a vertical direction. The pressure of the gas is such as to counterbalance the columns and load.

Belt tension-adjusting device

Abstract: A belt-tension-adjusting device for a toothed belt and dual pulley drive arrangement, including an intermediate toothed pulley or sprocket wheel having an outside diameter larger than the respective diameters of the two pulleys, wherein the belt may be tensioned by manually holding one side of the belt away from the intermediate pulley, rotating the latter toward one of said dual pulleys, and releasing the side of the toothed belt to mesh with the teeth of the intermediate pulley in its new location.

Type head driving means employing flexible belt

Abstract: 1,191,738. Typewriters. TRIUMPH WERKE NURNBERG A.G. 9 Aug., 1967 [3 Sept., 1966], No. 36571/67. Heading B6F. In a typewriter having a printing head which rotates about one axis and tilts about another the type-selecting means includes an endless flexible member e.g. belt 31 trained around the head or around a pulley rigidly connected thereto. In one form, the printing head comprises two members 19, 20 with part-spherical surfaces carrying circumferential rows of type 21, 22. The members 19, 20 are removably fixed to an axle 25 rotatable in the arms of a forked member 32 the base 34 of which is integral with a hollow shaft 35 rotatable in a carrier member 37. A toothed pulley 28 is fixed to the axle 25 and is engaged by a toothed endless belt 31 which can be driven by a pulley 55, Fig. 7, to rotate the printing head about the axis of axle 25 so as to bring a selected type into line with the printing point. After such operation the shaft 35 is rotated through actuation of an angle lever 52 so as to bring the row of type containing the selected character into alignment with the printing point. The carrier 37 is now rocked by a cam 50, Fig. 6, and follower 49 about a pivot 45 and against the action of a spring 58 to move the printing head towards the platen for effecting printing. The printing head may be formed as a one-piece member (Figs. 1, 2) in which case the belt 31 engages a central toothed groove in the member. The printing head on the platen may move for letterspacing. Type alignment.-After the circumferentialselection movement, the members 19, 20 may be locked against further movement by a pin 39 engaging internal teeth 40 on the members, the pin 39 being attached to a rod 38 axially movable in the hollow shaft 35. In the ease of a one-piece printing head, the end of the rod 38 engages the central toothed groove. According to a modified construction (Fig. 8) circumferential rows of type are formed on a barrel-shaped printing-head (60), the head being rotated about its axis for a first selective movement by a belt (74) engaging an external groove situated beyond the rows of type. An internal bridge member (65) is pivoted to a bracket (67) and is rotated by toothed gearing (69, 70) to effect the second or rocking selective movement of the printing head for bringing the row of type containing the required character into alignment with the printing point. The bracket (67) is rocked about an axis (76) to effect printing.

Improvements in Winding Apparatus

Abstract: 1,168,893. Winding yarns. J. SCHARER. 16 Aug., 1967 [19 Aug., 1966], No. 37656/67. Headings DID and D1J. A winding machine for winding threads, yarns or tows into crosswound packages has its traverse formed by two yarn guide arms 34, 41 which rotate in opposite directions about two parallel axes over a yarn guide 52. The arms 34 and 41, during rotation, alternately project beyond the contour of and retract behind the yarn guide 52, see also Fig. 3 not shown. The arms 34 and 41 and bobbin shaft 6 are driven at a predetermined relative speed by a progressively variable gear 91, 93 the gear ratio increasing in response to the increasing radius of the package by means of a feeler member (e.g. bobbin support 70) coacting with the growing package. The winding speed can thus be kept constant or progressively increased. As shown in Figs. 6 and 7, yarn 62 is passed through tension device 63, past stop motion 64 over the thread support 65, then engaged by the oppositely rotating thread guide arms 66, over supporting shaft 99 and wound onto the package 67. Traverse mechanism: The oppositely rotating arms (labelled 34, 41 in Fig. 1 and 66 in Figs. 6 and 7) are rotated on offset axes by a shaft (32) and eccentric sleeve (38), see also Figs. 2 to 5 not shown. Thereby, as the thread approaches the end of one traverse, the rotating arms are radially displaced slightly and the thread slips easily from one arm to the other which moves it in the opposite direction. The drive to the rotating arms is taken from a common shaft 21 which, in Fig. 1, also drives the bobbin spindle. In Fig. 6 the spindle and common shaft are both driven by a single toothed belt. The arms and the rotational speed of the bobbin can be reduced as the package grows, (see below). Preferably projections of contours swept by the rotating arms onto a generatrix of the package are of identical length. The thread support (labelled 52 or 65 in Fig. 1 and 6 respectively) can have a straight or curved edge so as to produce differently shaped packages. Spindle and rotating arms drive is taken from motor 71 via belt 72, drum 80, shaft 79, drum 81, through belt 93 to friction disc 91 thence to the common spindle and rotating arms drive (see above) via gear 92, belt 74 and pulleys 75 and 76. As the package grows the rockable arm 70 moves clockwise and this motion operates via linkages 98 to move a toothed sector 97, and thus pulley 95 and belt 93, to the right. The rightward movement of belt 93 lowers the gear ratio between drum 81 and friction disc 91 and thereby reduces the speed of the bobbin and rotating arms. Stop motion: When device 64 detects a break in the yarn a pin 89 (Fig. 7) causes segment 87 to be coupled with rotating shaft 79 and control shaft 86 thereby pivoting the friction disc 91 away from belt 93 into a neutral position thus interrupting the spindle drive. End finding: Simultaneously with the interruption of the spindle drive on rotation of control shaft 86, an upper cam 107 connected to control shaft 86 also rotates thereby causing its cam follower to (a) swing suction nozzle 110 upwardly to the package and (b) rotate rocking arm 70 so as to lift the package off supporting shaft 99, Fig. 6. Meanwhile the continued rotation of the lower cam 100 depresses its cam follower still further and thus engages the friction disc 91 with rotating cone 90. This cone drives the friction disc 91 and the package in reverse to unwind the thread which then is sucked into nozzle 110. On further rotation of control shaft 86 and its cam 100 (a) a pawl (123) (Figs. 9 and 10 not shown) acts on notched segment 87 so as to disengage rotating coupling 85 from shaft control 86, and (b) cam 100 pivots the friction disc 91 away from rotating cone 90 and cam 107 returns the nozzle downwardly. Recommencing winding: The thread held in suction tube 110 is knotted and the attendant depresses foot pedal 124 (Fig. 6). This releases the pawl (123) and recouples control shaft 86 with rotating coupling 85. Cams 100 and 107 are thereby rotated to their operating positions in which friction disc 91 is returned to press against revolving belt 93 and package 67 is lowered onto shaft 99. Cams 100 and 107 are stopped in the operating position by the decoupling of shaft 86 from rotating coupling 85 by the engagement of notched segment 87 with pin 89.

Drive arrangement for sewing machines

Abstract: A drive arrangement for sewing machines, especially buttonholestitching machines, having a needle drive shaft and a stitchformer drive shaft to be independently rotated. The drive arrangement comprises an electric motor whose countershaft is provided with belt drive sheaves at axially spaced locations thereon. The countershaft is pivoted relating to the motor assembly below the fabric feed table of the machine about an axis laterally offset from the shaft axis but parallel thereto and against a spring establishing belt tension. The machine arm or head is tiltable about a horizontal axis and entrains the countershaft with it to eliminate the need for disconnecting the belts passing around the needle-drive-shaft pulley and one of the sheaves.

Cam operated variable ratio belt drive

Abstract: A POWER UNIT FOR USE ON MACHINE TOOLS HAVING A MOTOR FLANGE-MOUNTED ON A HOUSING WITH A SELF-ADJUSTING PULLEY CONNECTED TO A ROTOR SHAFT OF THE MOTOR. THE MOTOR DRIVES AN OUTPUT SHAFT OF THE POWER UNIT THROUGH A BELT ENGAGED BETWEEN MOVABLE AND FIXED SHEAVES ON THE OUTPUT SHAFT WHICH PROVIDE A VARIABLE EFFECTIVE DIAMETER PULLEY. THE PULLEY ON THE OUTPUT SHAFT IS ADJUSTED BY A SEMI-CIRCULAR CAM AND A CAM FOLLOWER CONNECTED TO THE MOVABLE SHEAVE TO CONTROL AND VARY THE SPEED OF ROTATION OF THE OUTPUT SHAFT. BRAKE SHOES ACTUATED BY A CAM LEVER AND A BRAKE DRUM ON A SHEAVE OF THE OUTPUT SHAFT SELECTIVELY LOCK THE OUTPUT SHAFT AGAINST ROTATION.

Fishing rod construction

Abstract: A reel and a line are mounted on a fishing rod and a plurality of pulley assemblies are positioned at longitudinally spaced points along the rod with the fishing line trained over the pulleys. Each pulley assembly is mounted for pivotal movement about an axis generally parallel to the axis of the rod and pivotal movement about an axis transverse to the axis of the rod.