Showing papers on "Pulley published in 1968"

Combined rowing apparatus and exercising apparatus

Abstract: Rowing apparatus having a substantially rectangular frame for alternative support on a horizontal surface and a vertical surface. The frame has parallel side members and a seat carriage with means for sliding movement on the side members. A first tension spring means is provided with means removably connecting the tension spring means between the seat carriage and the front of the frame. Two handles are at opposite sides of the frame and a separate line is attached to each handle. A pair of first pulleys are connected to the front of the frame and a pair of rear pulleys connected by a second tension spring means to the rear of the frame. The lines pass respectively from each said handle, round the first pulley, round the rear pulley and then forwardly whereby each rear pulley is acted on by at least two runs of line so that after removal of the seat carriage the apparatus may be mounted vertically for arm exercising. A crossbar is mounted on the front of the frame serving as a footrest in the horizontal position of the frame and as a handgrip in the vertical position of the frame.

Force measuring device

Abstract: 1,209,954. Force transducers. BOFORS A.B. Jan.30, 1968 [Feb.7, 1967], No.4822/68. Heading G1N. A transducer for measuring a force F (Fig. 1a) comprises a beam 1 fixed to a support 2 at one end and with a second, parallel, shorter beam 7 attached to the other, the force F being applied to the free end of beam 7, where in the resulting distortion of beam 1 is measured by strain gauge pairs 3, 4 and 5, 6 (latter pair not shown), located symmetrically on beam 1 under the point of application of force F, the pairs of gauges 3, 4 and 5, 6 being disposed at right angles to each other, as shown. The strain gauges are connected into a bridge circuit whose output is indicative of the force F. The arrangement is automatically insensitive to bending moment, transverse force, axial force and torque. The sensitivity is improved by making beam 1 a hollow tube Fig. 5 (not shown) or of I cross-section Fig. 4b (not shown), at least where the strain gauges are mounted. The second beam 7 may be tubular surrounding beam 1. The transducer assembly may form the stationary shaft of a pulley 12 Fig. 9 whereby the tension is a wire carried by the pulley may be measured. In another embodiment Fig. 6 two tubular further beams 7 1 , 7 11 are attached one to each end of tubular first beam 1. In a further embodiment Fig. 10 (not shown) a transducer at each end of a wheel axle may be used to measure the weight of the vehicle.

Motion transmission drive

Abstract: A power transmission device having a pair of pulleys connected by a traction transmitting member such as a chain, such chain being of sufficient length to provide intentionally a certain amount of sag between the pulleys with control of both slack and tight side chain pull and control of maximum ratio of tight to slack pull. Continuous tension on both tight and slack sides of the member is applied to provide for adequate wrap of the member around the pulley. The pulleys may be of variable pitch type to provide for adjustable speed operation under suitable control. The chain has longitudinally extending contact surfaces engaging the pulley flanges which lie along the centerline of the chain, are essentially flat, match the pulley flange surfaces, and are positioned between the joints of the chain links.

Adjustable bracket structure

Abstract: 1,249,774 Brackets DAZOR MFG CORP Jan28, 1970, No4100/70 Heading A4B A counterbalanced brack assembly comprising a support 35 including two spaced plates 41 each with an arcuate slot 77 defining a cam surface 81, an elongate arm 10 comprising a parallelogram linkage 11, 12; (13), 14, pivotally mounted on the support, at 49, adjacent its inner end and provided with a load-carrying extension arm 15 at its outer end, a rotatable pulley 50 carried at a pivot axis 51 on the support 35, a link 58 connected to and between the inner end of the elongate arm 10, at 36, and the pulley 50, at 60, and a precompressed counterbalance spring 63 operatively attached by a link 65 to the pulley by a pin 75 engaged in the slots 77 and in a pulley slot 76 with a cam surface 80, the arrangement being such that the cam surfaces 80, 81 co-operate with the pin 75 to vary its offset from the pivot axis 51 as the pulley 50 rotates to compensate for the change in spring-load and hence to maintain a substantially constant counterbalancing moment about the pivot axis 51 The link 58 comprises a U-shaped strap 52 and a flexible cable 53 The longer links 11, 12 of the elongate arm 10 comprise nesting U- shaped channels which frictionally interengage to an extent which is adjustable by a stabilizer (31), Fig 7 (not shown)

Power transmission belt

Abstract: AN EXTENSIBLE BELT, PARTICULARLY A POWER TRANSMISSION BELT, CONTAINING A TENSION SECTION OF LONGITUDINALLY EXTENDING INDIVIDUAL TEXTILE CORDS WHICH INCLUDE SYNTHETIC THERMOPLASTIC FILAMENTARY MATERIAL IN THEIR STRUCTURE. THE CORDS ARE SIMULTANEOUSLY RELAXED AND HEAT-TREATED IN THE ABSENCE OF APPLIED TENSION AND ARE THEREBY CAPABLE OF AN INITIAL STRETCH OR ELONGATION WITHIN CERTAIN DEFINED LIMITS AND A SUBSEQUENT RECOVERY OF AT LEAST A SUBSTANTIAL PORTION OF THE INITIAL STRETCH. THE CORDS ARE SUBSEQUENTLY INCORPORATED INTO THE BELT AND THE VULCANIZED BELT IS THEREBY MADE EXTENSIBLE WITHIN CERTAIN DEFINED LIMITS AND CAPABLE OF BEING STRETCHED IN ORDER TO BE INSTALLED IN A BELT DRIVE ASSEMBLY. AFTER THE INITIAL STRETCH, THE BELT SUBSE- QUENTLY RETRACTS OR RECOVERS TO THE DRIVING POSITION WITH RESPECT TO THE PULLEYS AND RETAINS SUFFICIENT TENSION TO FRICTIONALLY ENGAGE THE PULLEY SURFACES AND PERFORM ITS DRIVING FUNCTION. THE SELF-TENSIONING BELT OF THIS INVENTION ELIMINATES THE NEED FOR TENSIONING DEVICES OR MEANS TO ADJUST THE DRIVE TO PROVIDE THE PROPER TENSION REQUIRED WHEN CONVENTIONAL TRANSMISSION BELTS ARE EMPLOYED AND IS PARTICULARLY USEFUL IN APPLICATIONS INVOLVING V-TYPE TRANSMISSION BELTS WHICH ARE DESIGNED TO OPERATE WITH GROOVED PULLEYS OR SHEAVES.

Removable securing device

Abstract: A clamping bushing for removably securing two elements on each other, for example, a pulley on a shaft, so as to be exactly coaxial. The device consists of a tubular part which is slipped, for example, loosely over the shaft and has a pair of substantially radial flanges which extend at an angle of more or less than a right angle to the tubular part and have small coaxial tubular extensions on their outer ends which are fitted tightly, for example, into a cylindrical bore in a pulley. When a pressure is applied upon a pressure fluid in the chamber formed between the flanges, the tubular part and the wall of the bore, the flanges are bent to a more erect position and thereby increase in effective length so as to connect the two elements tightly to each other.

Blade drive and braking arrangement for a rotary lawn mower

Abstract: A system for driving and braking a blade in a rotary lawn mower. An arm is pivotally connected to a blade housing. The free end of the arm carries an idler pulley which, on rotation of the arm in one direction, is moved to tension a belt which also passes about a drive pulley and a pulley connected to the blade. The belt tensioning causes the blade to be driven. On rotation of the arm in the opposite direction, the belt tension is released and a brakeshoe carried on the arm engages the blade pulley to terminate blade rotation. Direction of rotation of the arm is controlled by a mechanical linkage from an operator''s lever.

Final drive for terrain vehicle

Abstract: A side drive train system for motor driven vehicles with wheels having a belt and pulley system associated with the axles of the wheels for rotating the same where one axle is driven directly or indirectly from the side drive train system.

A friction-type exercising device

Abstract: An improved exercising device whereby the person exercises by pulling a rope means extended generally over and between upper and lower pulley wheels. The exercising device is provided with an adjustable friction brake, whereby the amount of pulling force required to overcome the friction may be varied, as well as guide means, whereby the rope means is retained in contact with the pulley wheels and in the proper operational path throughout the use of the exercising device. The operations of lifting and pulling may be aided by an adjustable, pivoted hand grip member movably disposed along the rope means for selected affixture.

V-belt pulley

Abstract: A pair of belt transmission flanges are mounted on a rotatable shaft with at least one of the flanges biassed in direction toward and axially movable to and from the other flange so as to adjust the width of the belt gap defined between the two flanges. The at least one movable flange comprises a hub, the inner peripheral surface of which spacedly surrounds the outer cylindrical surface of the rotatable shaft with a pair of bearing members axially spaced between and in contact with these surfaces. A torque transmitting member interconnects the at least one movable flange with the rotatable shaft so as to effect rotation of the former with the latter.

Means controlling the driving ratio of a motor vehicle

Abstract: A MOTOR VEHICLE HAVING AN INTERNAL COMBUSTION ENGINE WITH A CARBURETOR, A THROTTLE CONTROL VALVE AND A TRANSMISSION SYSTEM. THE TRANSMISSION SYSTEM HAS ONE OR MORE VARIABLE DIAMTER BELT DRIVEN PULLEYS, EACH HAVING A BELT OF TRAPEZOIDAL CROSS-SECTION ASSOCIATED THEREWITH. EACH PULLEY HAS AN AXIALLY DISPLACEABLE HALF PULLEY AND A CYLINDER CONTROLLING THE VARIABLE HALF PULLEY HAS TWO CHAMBERS. A PISTON FIXEDLY SECURED TO THE PULLEY SHAFT SEPARATES THE CHAMBERS AND A THROW-OVER VALVE IS ASSOCIATED WITH THE PISTON CONTROLLING THE PRESSURE BELOW ATMOSPHERIC IN THE CHAMBERS CREATED BY THE INTAKE MANIFOLD OF THE ENGINE. THE THROW-OVER VALVE HAS TWO SELECTIVELY OPERABLE VALVE PORTIONS FOR SERVING THE RESPECTIVE CHAMBERS OF THE VARIABLE PULLEY CONTROL CYLINDER AND ELECTRICAL MEANS CONTROL THE PORTIONS IN DEPENDENCE ON THE DRIVING CIRCUMSTANCES OF THE MOTOR VEHICLE. IN ONE PREFERRED EMBODIMENT, THE TWO VALVE PORTIONS, WHICH ARE SOLENOID OPERATED, ARE RESPECTIVELY ACTUATED BY PREDETERMINED POSITIONS OF THE PIVOTAL THROTTLE VALVE WITHIN THE INTAKE MANIFOLD ADJACENT THE CARBURETOR, WHICH VALVE ACTUATES AN ATTACHED MICRO-SWITCH, AND THE OTHER BY A BRAKE-OPERATED SWITCH. IN OTHER EMBODIMENTS, CENTRIFUGAL SWITCHES MAY BE INCLUDED IN THE RESPECTIVE ELECTRICAL CIRCUITRY BY BEING INTERPOSED BETWEEN THE SOLENOIDS OF EACH VALVE PORTION OF THE THROW-OVER VALVE AND THEIR RESPECTIVE AFORESAID ACTUATING DEVICES. THESE LATTER CENTRIFUGAL SWITCHES ARE OPERATED ALSO IN ACCORDANCE WITH PREDETERMINED VEHICLE CONDITIONS, I.E. THE FIRST AS BY THE SPEED OF THE VEHICLE VIA ITS SPEEDOMETER CABLE OF SHAFT, AND THE OTHER RESPONSIVE TO PREDETERMINED ENGINE SPEED, WITH EACH BEING NORMALLY IN THE OPEN CONDITION BELOW CERTAIN PREDETERMINED R.P.M.''S, AND RESPECTIVELY THE FORMER SERVING TO IMPROVE THE SHIFT QUALITY, AND THE LATTER A CLEANER EXHAUST EMISSION.

Apparatus for winding and unwinding strip material

Abstract: 1,214,855. Feeding webs. CIBA Ltd. 23 April, 1968 [28 April, 1967], No. 19193/68. Heading B8R. Apparatus for winding or unwinding strip material from a spool 2 coupled to a belt-driven pulley 4, comprises first and second pairs of drive rollers 22, 23 and 24, 25 respectively, for the belt 5, and a brake 26, 27 for the belt, the rollers and brake being controlled by a cam member 38 movable by a web-tensioning lever 7 attached to a spring 44 so that in the upper position of the lever 7 the rollers 22, 23 engage the belt 5 to drive it in one direction i.e. clockwise, Fig. 1, for unwinding, in the middle position of the lever 7, the brake 26, 27 engages the belt 5 to bring it to rest, and in the lower position of the lever 7 the rollers 24, 25 engage the belt to drive it in the other direction i.e. anticlockwise, Fig. 1, for winding. The rollers 22, 24 have fixed axes and the brake part 26 is fixed. The rollers 23, 25 and the brake part 27 are carried by levers 28, 29, 34 respectively having springs attached tending to move the rollers, &c., into engagement with their co-operating members. Both the rollers of each pair or the fixed rollers only may be driven. Pins 40, 41, 42 on the levers 28, 29, 34 are engaged by a slot 39 in the cam member, the slot 39 having a depression E into which the pins can move, so that in the upper position of the lever 7, the pin 40 drops into the recess E and rollers 22, 23 engage the belt 5 to drive in an unwinding direction. Similarly, as the lever 7 falls, one or other of the pins 41, 42 moves into the recess to cause braking or reverse driving of the belt. The belt 5 is tensioned by rollers 12, 13 mounted on levers 14, 15, loaded by springs 18, 19. During unwinding, a stop 20 limits movement of the lever 14 so that tension is applied only by the roller 13 and during winding a stop 21 limits movement of the lever 15 so that tension is applied by the roller 12. The arrangement maintains the pull of the belt 5 on the pulley 4 at a substantially constant value. Two arrangements as described may be employed, one for feeding the material to a treating station and the other for rewinding the material. There may be a lost motion connection between the lever 7 and the cam 38 to prevent continuous stopping and starting of the belt during oscillation of the lever through a small angle. In a modified arrangement, Figs. 7, 8 (not shown), a stepped pulley 4 is employed, each step being associated. with a separate belt 5, and each belt being associated with lever-carried drive rollers 23, 25. All the rollers 23 are associated with a common drive roller 22, and all the rollers 25 are similarly associated with a common drive roller 24. A separate cam 38 is provided corresponding to each belt, all the cams being fixed to the tensioning lever 7. The cams are designed so that the belt engaging the smallest diameter step of the pulley is driven by its rollers when the lever 7 is in its highest or lowest position i.e. the greatest speed is obtained, whereas in intermediate positions lower speeds are obtained. In the central position of the lever, a brake engages the belt to bring it to rest as described above.

Variable speed drive mechanism

Abstract: 1,210,347. Variable speed gear. BELL & HOWELL CO. 19 June, 1969 [12 July, 1968], No. 30993/69. Heading F2D. [Also in Division G2] In a projector, a drive mechanism allows the use of a constant speed shaded pole motor in an application where the film speed must be synchronized with another operation. A pulley 18 forming part of a belt drive is mounted on a shaft 28 of a shaded pole motor 12 and is formed of two parts, part 30 being fixedly mounted and part 34 being axially slidable to vary the transmission ratio of the belt drive. The axial position of part 34 is controlled by a variable speed motor 22 and a coupled centrifugal regulator 16 which by means of a ball and race mechanism pushes part 34 axially, the thrust being transmitted through bearing 44, by the action of the balls 54 on the concave inner surface of slidable member 52. Motor 22 may conveniently be of the permanent magnet D.C. type in which case a variable voltage serves as a control signal.

Hydraulic pulley apparatus

Abstract: Hydraulic pulley apparatus including a frame, anchored to a tiedown assembly, supporting a first pulley on a movable axis and a second pulley on a selectably fixed axis. A cable or chain extends over the first and second pulleys and is connected at one end to the frame, with the other end being attached to a workpiece. The pulleys are arranged in such a manner that movement of the first pulley away from the second pulley draws the end of the chain attached to the workpiece toward the second pulley. The movement of the first pulley is accomplished by selectively operable and controllable hydraulic power means. A third pulley may be mounted on the frame at various positions above the first and second pulleys for receiving the end of the chain attached to the workpiece, and maintaining the chain at various attitudes. Locking means hold the chain under tension to permit release of the hydraulic power means for sequential operation thereof.

Pulley with variable radius of curvature for flexible line,particularly for flexible drill pipe

Abstract: 1,211,248. Pulleys. INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS. 28 June, 1968 [29 June, 1967], No. 30995/68. Heading F2Q. A flexible drill pipe gripping pulley 4-6 has a profile the radius of curvature of which progressively decreases from the inlet to the outlet of the pulley such that the pulley profile effectively radially reduces to correspond to (i.e. match) the contraction of the flexible drill pipe as the load thereon (i.e. its own suspended weight) decreases as it is wound over the pulley from the inlet to the outlet thereof whereby movement of the contracting pipe relative to the pulley is eliminated and the resulting wear avoided. The pulley comprises two flanges 4, 5 integrally connected at 25, 26 and freely mounted on a shaft 15, and has toothed rims 23, 24 meshing pinions 22, 21 driven by hydraulic motors 17, 16 through reduction gears 20, 19, the pulley flanges carrying a number of rim sections 6 secured to radial support members 27 which at their lower ends bear through rollers 28 on a cam 29 the profile of which decreases progressively from the inlet to the outlet of the pulley between two values R 1 and R 2 respectively. The angular position of the cam 27 may be fixed or may be adjustable with respect to a support frame by means of a crank-rod system 35, 36 actuated by an hydraulic jack 37, the adjustment being effected either stepwise as the drill pipe 2 is wound up or unreeled, or continuously adjusted as a function of the load on the pipe at the pulley inlet. Each pulley rim section 6 includes three gripping shoes 7, 8 and 9 each embracing a circular section of the drill pipe cross-section and having an elastomeric coating on its pipe contacting surface. The centre shoe 7 is integral with its rim section 6, the other two shoes 8, 9 being diametrically arranged laterally each side of the pipe and formed respectively integrally with a half-jaw 10 and piston-rod of a reversible hydraulic jack the cylinder 13 of which is secured to the half-jaw 10 which is movable parallel to the pulley axis along two slots 11, 12 in the rim section 6. The drill pipe is thus hydraulically clamped by the lateral shoes 8, 9 with equal pressures all along the section of pipe sheared over the pulley to counteract the effect of compression of the pipe against the bottom of the pulley rim and provide a more regular distribution of pressure against the bottom shoes 7, the hydraulic fluid for the jacks 13 being supplied via hoses 38a, 38b connected by pairs of pipes 38 from a rim 39 providing a rotary connection for fluid distribution from the shaft 15.

Cop winder with controlled yarn tension

Abstract: A yarn feeler means for a yarn winder includes a dancer pulley carried by a pivotally supported arm pivotal about the axis of a mounting shaft, the dancer pulley being engaged in a loop of the yarn in advance of the yarn-winding means. Spring means are connected to the shaft to apply an essentially uniform torque thereto and tension to the looping arm. The yarn winder is driven from a variable speed motor supplied by a supply circuit including supply adjusting means operable responsive to the actual position of the dancer pulley and arm to provide a supply proportional to the actual position to compensate for differences between the yarn-feeding speed and the yarn-winding speed. An auxiliary supply control circuit is effective, when closed, to boost the adjustment of the supply, and includes a movable contact supported by an arm fixedly connected to the shaft and movable within an arc of small amplitude, the movable contact, upon movement of the dancer pulley and arm in one given direction, engaging a fixed contact to close the auxiliary control circuit to boost the motor supply, such as the motor voltage, to counteract any tendency to increasing the difference between the yarn-feeding and yarn-winding speeds.

Backboard-mounting structure

Abstract: A basketball backboard is supported at the lower end of a first generally downwardly and forwardly inclined superstructure. The first superstructure is mounted at its upper end for pivotal movement. Hingedly connected to the superstructure adjacent to the backboard is a second generally upwardly and forwardly inclined superstructure, or brace member, having a knee joint. The upper end of the brace member is also mounted for pivotal movement. A first pulley is mounted adjacent the upper mounting point of the brace member, a second pulley is mounted on the first superstructure adjacent the mounting point of the brace member, and a third pulley is mounted to the first superstructure at about the level of the knee joint in the brace member. A cable extends from a takeup device, over the first pulley, along the brace member, around the second pulley, along the first superstructure, around the third pulley, and is fastened to the brace member adjacent the knee joint. A stop member is mounted on the cable between the second and third pulleys. On takeup, tension along the full length of the cable causes the knee joint to break and starts raising the backboard. When the stop member engages the second pulley it changes the effective point of attachment from adjacent the knee joint to the second pulley, thereby reducing the amount of cable which needs be taken up.

Improvements in tensioning means for chain, belt or the like drives

Abstract: 1,117,863. Belt or chain tensioning devices; wedges. GRAHAM ENGINEERING CO. Inc. 14 Sept., 1965, No. 39173/65. Headings F2K and F2Q. [Also in Division F1] To tension a chain or belt connecting two sprockets or pulleys, one of the pulleys 70 is urged away from the other. A tension spring 81 urges a U-shaped wedge 75 between the base of a fixed U-shaped bracket 73, having guide slots 74 for the axle 72 of the pulley 70, and shoes 78 on the axle 72. The tensioning device is used in a mechanism of the type described in Specification 932,201 (see Division XXIX) for converting rotary motion into hydraulic pressure signals, or vice-versa (Figs. 1, 4, not shown) (see Division F1).

Improvements in and relating to the coiling and storage of electric cable, hose, ropes and the like

Abstract: 1,213,037 Coiling cables MINISOCCER DEVELOPMENT Ltd 17 July, 1969 [20 Aug, 1968], No 39873/68 Heading B8M Means for coiling and storing cable comprises a substantially frusto-conical casing 1, an opening 5 at the upper end of the casing through which the cable 13 is moved into and out of the casing, and pulley means adjacent the opening 5 for moving the cable, so arranged that the cable in moving out of the casing runs partly round a main pulley 9 to move away from the casing in a substantially horizontal, or downwardly inclined, sideways direction, the base of the casing being provided with a rim 3 or feet for holding the casing immobile on a floor A guide core 14 may be provided inside the casing to ensure coiling of the cable Jockey pulleys 10, preferably adjustable relative to the pulley 9 to accommodate different sizes of cable may be provided to ensure contact between the cable and the pulley 9 The pulley 9 may be an adjustable V-pulley and may be driven by hand, gearing, energy-storing spring or motor In the case of a motor being used, a switch may be provided which is actuated by cable sag to automatically start the motor to take in the slack cable A cover may be fitted over the pulley means and a carrying handle 12 is preferably provided In a preferred embodiment, the end of the cable is connected to an electrical socket provided on the coping 1 which may be moulded from plastics material

Crawler-type vehicle

Abstract: A drive system including a first rotary drive shaft, a pair of driven rotary half shafts and a pair of rotary jackshafts The shafts generally parallel each other and the jackshafts are supported for independent swinging movement about the half shafts toward and away from the drive shaft Longitudinally spaced portions of the drive shaft are drivingly connected to the jackshafts through drive belts trained about pulleys on the drive and jackshafts The jackshafts are drivingly connected to the half shafts through drive chains trained about sprocket wheels on the jack and half shafts and brake means are operatively associated with the jackshafts for braking the latter when they are moved toward the shafts, which movement of the jackshafts simultaneously untensions the belts drivingly connecting the shaft to the jackshafts

Apparatus for the loading and unloading of ships

Abstract: 1,112,537. Loading and unloading ships; endless conveyers. ORENSTEIN-KOPPEL UND LUBECKER MASCHINENBAU A.G. 18 June, 1965, No. 25998/65. Headings B8A and B8E. Ship loading and unloading apparatus comprises a conveyer belt jib 15, Fig. 1, pivotably connected at 14 to a turntable 10 which is mounted on a carriage 9 running on a track (not shown) on a gantry 3, the latter being movably supported on rails 4, 5 on a quay 1 and the jib 15 supporting an endless elevator 22. The turntable 10 also supports a jib 11 and a counterbalance jib 12 which are interconnected by a rope system 13 the length of which is preferably fixed but may be varied, and the jib 15 is supported for vertical movement by a rope 17, 18 connected to a winch 19. The elevator 22 is pivotal about a horizontal axis 20 and is adjustable by a screwed spindle and nut connection 23. The latter may be replaced by an hydraulic or rope system and the elevator may be connected by universal joint means. Material from the hold of a ship 2 is delivered by the elevator 22 to a conveyer belt 24 which transfers it to the jib 15. The material then passes to a reversible conveyer belt 25 which discharges on to a longitudinally displaceable conveyer belt 26 for delivery to a heap 27 or to trucks disposed on tracks 6, 7, 8 or a conveyer belt line 29, Fig. 2 (not shown). When material is to be conveyed from the heap 27 the carriage 9 is run to the opposite end of its track, Figs. 3 and 4 (not shown), and the turntable 10 is turned through 180 degrees. The movement of the belt 25 is reversed when material is to be conveyed via a longitudinally displaceable and pivotable belt (30) to the hold of a ship. The belt (30) may be pivotable both horizontally and vertically. The elevator 22 comprises a system of buckets 39, Fig. 5, extending round pulleys 41, 42, 45, 46, the pulley 45 being driven. The pulleys 41, 42 are supported on an arm 43 which is variable in length and which is mounted on a supporting structure 35 by means of a telescopically extendable arm 40. The structure 35 is pivotably supported at 36 on a head-piece 21 in which are mounted the pulleys 45, 46 and the conveyer 24, and the structure is adjustable by a screw or hydraulic system 37. The angle between the arm 43 and the structure 35 is adjustable by a similar system 44.

Straight-shovel-type working equipment of a single-bucket excavator

Abstract: A single-bucket excavator comprises a boom with a grip mounted thereon and turnable about its longitudinal axis. A bucket is mounted on the grip and is suspended on movable pulleys of two double pulley block and tackle systems containing a balancing system which transmits loads to the boom via a spring-loaded friction device.

Driving mechanism for the weft inserters of shuttleless looms

Abstract: 1,202,613. Driving weft inserters; shuttleless looms. A. C. MONGE. 24 Jan., 1968 [31 Jan., 1967], No. 3761/68. Heading D1E. A weft inserter 1, which enters the shed empty and pulls out weft on retraction, is attached to a chain or belt 6, which is driven by a pulley 9, and which is attached to a member 7 so that, as the pulley 9 drives the belt 6, the bottom run of the belt is held stationary and thus the pulley moves with the belt whose top run is given twice the movement of the pulley. When the inserter has fully entered the shed the. rotation of the pulley 9 is reversed to withdraw the inserter and, at the same time the member 7 is given a movement by a cam 26 so that the bottom run of the belt moves and the top run is held stationary to provide a dwell for weft pick up.

Automatic screw machine

Abstract: AN AUTOMATIC SCREW MACHINE WITH A PULLEY-DRIVEN COLLET AND SPINDLE ASSEMBLY FOR RECIPROCALLY MOVING PARTS INTO AND OUT OF CONTACT WITH BORING TOOLS. THE ASSEMBLY HAS TWO REARWARDLY EXTENDING RODS WHICH FIT SLIABLY WITHIN RECEPTIVE OPENINGS IN A DRIVE PULLEY TO PERMIT ITS AXIAL RECIPROCATION WHILE BEING DRIVEN BY THE PULLEY. THE ASSEMBLY ALSO HAS APAIR OF CHUCKLING LEVES MOUNTED TO PIVOT ABOUT ONE END, UNDER THE DIRECTION OF A TIMING CAM, AND EXERT CAM-LIKE COLLET OPENING AND CLOSING PRESSURES ON A RESPONSIVE MEMBER. THE MACHINE HAS AN INDEX ROD AND AN INDEX PLATE WITH RECEPTIVE HOLES FOR THE ROD. THE PLATE IS AFFIXED TO A CAM-CONTROLLED SHAFT TO WHICH A TOOL HOLDER IS ALSO AFFIXED. WHEN THE INDEX ROD IS MOVED INTO ONE OF THE HOLES IN THE PLATE, A PART HELD BY THE COLLET AND SPINDLE ASSEMBLY IS GUIDED TO A PARTICULAR TOOL ON THE TOOL HOLDER.