Abstract: A double knit fabric having at least a first set of alternating wales comprising a first wale and a second wale, said first set of alternating wales forming the face side of the fabric;at least a second set of alternating wales comprising a first wale and a second wale, said second set of alternating wales forming the reverse side of the fabric; andat least six feed yarns, wherein the first wale of said first set of alternating wales has knit stitches produced by the first, third and fifth feed yarns, wherein the second wale of said first set of alternating wales has knit stitches produced by the second, fourth, and sixth feed yarns, wherein the first wale of the second set of alternating wales has knit stitches produced by the fourth feed yarn, and wherein the second wale of the second set of alternating wales has knit stitches produced by the first feed yarn.

Abstract: The lock for roller shutters comprises a hood-shaped body secured to the roller shutter and presenting a cavity directed downwardly, in such a manner that, when the roller shutter is lowered to its closure condition, the body encloses within its cavity an anchoring ring fastened to the threshold of the door. A straight bolt is mounted axially slidable in the lock body, so as to be capable of engaging the anchoring ring. A cylinder lock mechanism, also housed in the body, ensures the locking of the slidable bolt in its closure position.

Abstract: A locking mechanism is provided having a frame for mounting on a door or other closure. A movable bolt is supported on the frame for movements between extended and withdrawn positions. An additional member is mounted on the frame for slidable movements generally parallel to the bolt. At least two locking means are incorporated into the locking mechanism, the first of which releasably connects the bolt to the member, and the second of which releasably positions the member with respect to the frame. With the first locking means engaged, the bolt is movable together with the member. With both the first and second locking means engaged, the bolt is locked in the extended position. A securing means engagable with the first locking means prevents release of the first locking means. The locking mechanism is particularly adapted for use on storage compartments wherein a renter of the compartment will gain access by way of the first locking means and the owner will gain access by way of the second locking means.

Abstract: A locking mechanism having at least one but preferably two locking bolts movably supported for guided linear movement in a housing between locked and unlocked positions. Where two locking bolts are employed, each locking bolt moves in a direction opposite from the other. The locking mechanism is characterized in that each locking bolt is comprised by at least two superposed bolt parts which are linearly movable along the longitudinal axis of the bolt relative to each other and are provided on the corresponding longitudinal edges with a plurality of spaced matching teeth having an angle of 10.degree.-80.degree.. A key is provided for guided linear movement through a keyhole perpendicular to the bolt parts and having teeth matching those in the bolt parts formed in at least one of its side edges and where two oppositely moving bolts are provided, the key has matching teeth formed in each of the side edges thereof.

Abstract: A control device for a magnetic cylindrical lock includes a tubular housing eventually having on its inner surface axial and circumferential grooves, a cylindrical plug rotatable in the housing about a central axis and defining a central key channel and at least one axial recess on its cylindrical surface, a plurality of magnetic rotors supported in the plug for rotation about an axis transverse to the center axis of the plug, one face of the magnetic rotors having a third recess alignable with the second recess, a sleeve arranged for rotation and for an axial displacement between the housing and the plug, and arresting elements projecting from the sleeve to cooperate with the recesses in the housing, in the plug, and in the magnetic rotary members.

Abstract: A novel method and apparatus for opening a magnetic cylinder lock of the type having an outer cylinder, a rotatable inner cylinder disposed within the outer cylinder, one or more magnetic pins disposed within chambers of one of the cylinders for engaging the other cylinder to prevent the inner cylinder from rotating, and a keyway within the inner cylinder for insertion of a magnetic key to displace each pin and release the inner cylinder, thereby opening the lock. A probe is provided for insertion within the keyway to determine the presence and polarity orientation of each magnetic pin by detecting its magnetic field. An indexing arm within the probe abuts the lock and provides a signal representative of the position of each pin chamber. Sensor circuitry correlates a signal from the probe representative of the presence and polarity orientation of each pin with a signal from the indexing arm representative of the position of each pin chamber and displays the "combination" of the lock.

Abstract: A tool for the installation of so-called press nuts comprises a draw bar which is axially displaceable in a housing. A draw mandrel having a threaded outer end portion for cooperation with a female thread in said press nut is connected to the outer end of said draw bar, so that the press nut can be secured in a bore of a workpiece by being upset by means of a pulling force from the draw mandrel upon axial displacement of the draw bar into said tool housing. Said draw mandrel is axially unmovably but rotatably connected relative to the draw bar. The rotor of a motor is journalled in the tool housing around the outer end of the draw bar and is drivable in one or the other direction of rotation and is arranged thereby to rotate the draw mandrel thereby to screw same into or out of the press nut before and after the upsetting of same.

Abstract: A continuous mill has a plurality of passes arranged in series and formed by work rolls which are mounted on shafts secured to common chocks accommodated in housings.The chocks provided in the mill are equal in number to the workrolls forming a pass. Each of the chocks has two sides converging at an angle, and the shafts carrying the workrolls are cantilevered to each of said sides. The shafts secured to one side are offset relative to the shafts secured to another side so that the adjacent passes are spaced in closest possible proximity with one another; the angle between the sides of each chocks being equal to the divergence angle of the adjacent passes.

Abstract: The pitch of worn chain links is restored to original manufacturers' dimensions by decreasing their overall lengths. Concentrated heat is applied across a selected section at the center area of a link, and force is applied longitudinally to the ends of the link to compress the heated portion. The decrease in length at the heated and compressed section compensates for wear on the inside surfaces of the ends of the links that normally contact the connecting pins.

Abstract: In a forging machine where the frictional work is reduced in the driving system at the main crankshaft and its support bearings, especially at the moment a forging force is applied. A rotary driven crankshaft is connected to a crank mechanism, which has a connecting rod connected to the driven crankshaft. The opposite end of the connecting rod is pivotally connected to an arm for driving the main crankshaft in an oscillatory rocking motion, which reciprocates the hammer means.

Abstract: Apparatus for preparing leads of electrical components, such as transistors or the like, having a carrier plate rotatable about a fixed axis of rotation, at least one tool set arranged at the periphery of the carrier plate, said tool set including a stationary tool and a tool pivotable about a pivot axis that is parallel to the fixed axis of rotation, and a fixed cam disk. The pivotable tool, during rotation of the carrier plate, is controlled by an operating cam section of the fixed cam disk so as to move from an open position into a closed position, and the cam disk has a further, opening cam, section for controlling the pivotable tool so as to move from the closed position into the open position.

Abstract: There is disclosed a hydraulic circuit of a press for the hydromechanical drawing of pressings or workpieces in a pressure chamber forming the drawing die which includes at least two spaces for the fluid separated from each other by at least one piston transmitter. At least one of the spaces for the fluid in the pressure chamber separated from the pressure fluid for the forming of the pressing by the piston transmitter is connected by means of a connection branch with a controlled throttle valve with the hydraulic unit of the main working cylinder of the press which drives the drawing punch of the press. To the space for the fluid in the pressure chamber, which is separated by the piston transmitter from the pressure fluid for forming the pressing, is connected a filling branch with a return valve incorporated by means of a hydraulic distributor in the circuit of a hydrogenerator for driving the main working cylinder of the press.

Abstract: The stationary die of a thread rolling machine is mounted in a holder which enables the stationary die to be tilted relative to the movable die about an axis which coincides with the upper edge of the thread forming face of the stationary die. The upper edge of the die thus stays stationary when the die is tilted and remains in a fixed position relative to a track which guides fastener blanks between the dies.

Abstract: A method and means for testing the flammability of combustible materials is disclosed with sensor elements for sensing ionization in the vicinity of the material to be tested. The utilization of spaced apart polarized plate elements for sensor elements provides flame detection by sensing the ionization caused by the flame while the alternate utilization of a pair of spaced apart polarized wire elements or sensing elements allows flame height determinations in addition to detecting the presence of a flame.The method for testing the flammability of a combustible material comprises causing combustion of the material to be tested, sensing ionization in the vicinity of the material and measuring the amount of current flow caused by the ionization. Combustion of the material is selectively, alternatively caused by applying electrical power to the material to cause a flame and applying a heat source to the exterior of the material to externally cause combustion.

Abstract: A gas measurement and analysis system having a gas chromatograph which converts a gas mixture from a source to a time varying continuous signal. This signal is sampled and converted to digital form by an analog to digital converter which provides a stream of amplitude dependent digital values at equally spaced time intervals. These sampled signals are applied to a rate of change estimator system which provides an accurate estimate of the time derivative of the sampled signal by means of recursive digital feedback. The output of the estimator system is applied to a processor.

Abstract: The invention relates to apparatus for making waves in a liquid in test tanks and the like by the back and forth movement in the liquid of a displacer. A problem caused by the escape of liquid round the side of the displacer during such movement is overcome by the provision of a seal between the displacer and the wall of the tank, which seal by a rolling action allows relative movement between the wall and the displacer.

Abstract: The rheological properties of an extrudable material can be measured by extruding a strand of the material, measuring its diameter continuously, to give a series of diameter values, interpreting the variations in the strand diameter so as to characterize the surface of the strand, and deriving rheological data from the surface characteristics of the strand. The variations in the strand diameter can be interpreted as to peak-to-peak amplitude, average diameter value, the frequency of significant extreme values, standard deviations from a mean value, and the like. By means of these mathematical characterizations, the rheological behavior of the extrudable material can then be derived. The scorch behavior of a curable elastomer can be measured. The heterogeneity of a rubber compound can be described, or the macromolecular properties of a polymer can be measured (such as "gel", or degree of cross-linking.

Abstract: In preparing a sample of a liquid material, particularly a sample suitable for chromatographic analysis, an apparatus and method are provided whereby dissolved precipitatable material is removed from the liquid material by precipitation followed by filtering to obtain a liquid sample which can be suitably analyzed. In a preferred embodiment a combination of dilution and cooling are used to precipitate trinitrotoluene from a solution containing sulfuric and nitric acids prior to the chromatographic analysis of the remaining sample liquid material.

Abstract: A wire wound resistor is vertically disposed in a vessel. The resistor has a former of between 20 mm and 45 mm diameter and resistance wire of a resistance of between 1 and 4 ohms per turn connected in the circuit of an A.C. bridge circuit. Impedance change is indicated on a display unit calibrated to indicate the change in level of liquid e.g. milk in the vessel. The resistance wire is laid on the former by applying ultrasonic sound energy to soften the former which is of polysulfone or polycarbonate and the wire embedded in the softened former material. The vessel is shaped at the lower end to assist in giving linear readings when the level of liquid is low.

Abstract: A device for braking the motion of the float of a float type liquid-level gauge used with a liquid container, comprising a casing, a vane member disposed in the casing in such a manner as to produce a motion relative to the casing, a fluid placed to fill the inner space of the casing now containing the vane member and retaining an extra space for permitting the relative motion of the vane member, and a path formed in the casing to permit flow of the fluid inside the inner space of the casing during the aforementioned relative motion of the vane member inside the casing. In actual use, the casing is fixed in position and the vane member is connected with a member adapted to move in conjunction with the float of the float type liquid-level gauge. When a sudden, momentary displacement occurs in the liquid level in the liquid container with which the liquid-level gauge is used, the float kept on the liquid surface by buoyant force tends to follow the displacement.

Abstract: A petroleum or synthetic grease is used to protect electrical apparatus from overheating. The grease is applied to a portion of an electrical apparatus which is exposed to a gas stream, particularly to portions subjected to operating temperatures of about 100.degree. C. When the coated portion of the electrical apparatus overheats the grease forms particles in the gas stream which are detected by a monitor. The apparatus can then be shut down or its load reduced.

Abstract: A throwaway thermometer structure (10,110) comprising essentially a synthetic resin wall member (13,113) having a thin gas impermeable layer (11,111) defining the inner capillary bore (12,112) thereof. The outer wall member effectively defines a jacket and the inner layer effectively defines a core tube. Interlock structure (20,120) is provided for effectively accurately maintaining the longitudinal disposition of the jacket and core tube. Such maintained disposition provides effective accurate maintained disposition of a scale (17) or the like, provided on the jacket portion of the thermometer. In one form, the interlock (20) may be directly between the jacket and the core tube. In an alternate form, the interlock (120) is indirectly between the jacket and core tube, being effectively provided between the reservoir bulb (114) and the core tube (111), with the reservoir bulb being fixedly secured to the jacket.

Abstract: An expanding-fluid thermometer of the capillary type is provided wherein the expanding fluid is a silicone fluid containing a coloring amount of 1,4-bis(alkylamino)-9,10-anthraquinone. The thermometer of this invention is useful over a wide temperature range and does not release toxic materials when broken. It thus has particular utility as a cooking thermometer.

Abstract: A system for reducing undue vibrations transmitted to a vehicle by a tire assembly including a tire buffing or grinding machine, a tire balancing machine, and a mounting adapter for alternatively mounting the tire assembly on the tire buffing machine and the tire balancing machine. The tire buffing machine includes a drive unit for rotating the tire assembly about its rotational axis, a loading unit for radially loading the tire assembly, a buffing unit for selectively grinding away portions of the tire tread, and a control unit interconnecting the loading unit and the buffing unit to cause the buffing unit to reduce the loaded radial runout of the tire assembly.

Abstract: A system for selectably electrically pulsing each of a plurality of ultrasonic transducers in a testing apparatus in rapid sequence to produce a pattern of ultrasonic energy transmitted into and subsequently received from a test piece comprises a plurality of transducer pulsing circuits, each connected to a different associated one of the transducers. Each pulsing circuit includes a silicon control rectifier connected to ground and a capacitor, connected between the rectifier and the associated transducer, that is dischargeable to pulse the associated tranducer. The rectifier is switchable to an "on" condition to rapidly discharge the capacitor to ground. The rectifier maintains the "on" condition until current conducted through it drops below a characteristic holding current and thereafter switches to an "off" condition.

Abstract: A silicon transducer including a silicon frame with one or more lands extending from a diaphragm or the like. The lands are interconnected by two thin strips formed integrally with the lands. The strips are essentially the transducer. The transducer is constructed by etching a boron doped wafer with a mixture of catechol, ethylene diamine and water.

Abstract: A power take-off for a motor through a recoil starter mounted axially in relation to the flywheel. Operation of the recoil starter is not interfered with. Provision is also made for axial concentricity of drive and driven shafts when the power take-off is in use.

Abstract: When the hammer drill spindle and chuck are driven forward with the mode selection collar positioned to allow axial movement of the chuck and spindle, the annular ratchet is driven by the spindle through a one way roller clutch so it rides up the sloping surfaces of the fixed annular ratchet and then drops off the tooth corners to deliver a hammer blow of a magnitude determined by the operator pushing on the tool. If the rotation is reversed the clutch prevents rotation of the clutch input and prevents injury to the operator. If the selection collar is moved to lock the lugs in the detent notch of the cam surface the drill can be rotated either direction with the hammer action always locked out.

Abstract: A cam drive system having parallel input and output shafts and means for rotating the input shaft includes a plurality of cams coupled at intervals around the periphery of the input shaft. Each cam utilizes a camming surface which incorporates a radially outwardly sweeping step section and a constant radius dwell section positioned adjacent to each step section. A plurality of cam followers are coupled at intervals around the periphery of the output shaft. Each cam follower is aligned to engage a single one of the cams. The present invention converts the continuous rotation of the input shaft into intermittant displacements of the output shaft.

Abstract: A ball-and-screw power transmission device includes a screw or a threaded rod on which power to be transmitted is applied, an outer cylindrical member disposed around the screw, and at least one ball or spherical member located in contact between the adjacent turns of the thread on the screw and the inner wall surface of the outer cylindrical member, the rotational power being thus transmitted through the ball to the outer cylindrical member as a converted linear power. Means is further provided to restrain behavior of the ball during the inverse-directional and the forward-directional operations of the device relative to the direction of a load for automatically changing a reduction ratio between the two operations.

Abstract: The invention relates to a step by step motor and/or brake device through controlled translation, comprising two assemblies arranged substantially coaxially about the same shaft, one of them being slidable along said shaft, and the other assembly being rotatable about said shaft.The device according to the invention may be used in mechanical, pneumatic or electrical equipments, in automatic arrangements, in servo-controls, as modifiable drives, step by step motors, step by step brakes.

Abstract: The present invention relates to a variable speed traction drive employing combinations of the following shapes; cones, internally tapered sleeves, dual faced internally tapered sleeves, and a combination of a dual faced internal wheel with a dual faced external shape.The primary purpose of the shapes and the manner in which they engage in traction is to achieve a matched geometry between the contacted rolling components, to increase the contacting surface areas, to engage each other in a point to point relationship, and to maintain a narrow or small difference between the largest diameter of any of the rolling components of the drive and the smallest diameter of any of the rolling components of the drive. For example, a velocity difference occurs when a cylinder is driven by traction by a cone roller, or when two cones whose angles are not alike are driven one to the other by traction.

Abstract: An axial loading device for use, for example, in a transmission system having toroidal discs with rollers engaged between toroidal surfaces thereon, the device including spring means acting beween an abutment and a member to which axial pressure is applied, the member being axially movable relatively to the abutment and the spring means acting on one part of said member in a first axial position of said member and acting on a further part of said member when it is in a further axial position, the said one part of the member being spaced from said further part of the member radially of the axis thereof so that differential axial loading is applied to said member by said spring means when the member occupies said first and said further axial positions, respectively.

Abstract: A four member derailleur is disclosed having a control element which includes a plurality of engageable portions corresponding to the number of speed change stages mounted to one of the four members and a retainer for engaging with or disengaging from the engageable portions to keep a movable member of the four members in a proper position. The derailleur also includes means for moving the retainer in the direction of disengaging from each of the engageable portions so that when the movable member returns, through action of a return spring, the retainer may disengage from each of the engageable portions allowing the return movement of a chain guide.

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.

Abstract: V-belt type variable transmission including primary and secondary sheave assemblies which are connected together by an endless V-belt, the primary sheave assembly having a centrifugal device for biasing it so that the effective diameter of the primary sheave assembly is increased in accordance with an increase in drive shaft. The secondary sheave assembly has a cam device for biasing it in a direction wherein the effective diameter thereof is increased under the force applied by the cam device. In addition, the secondary sheave assembly is provided with a centrifugal device which centrifugally biases it to assist the action of the cam device.

Abstract: An engine driven shaft is connected to an input gear of the transmission which, in turn, is geared to a power branching cascade, providing either for axial branching first followed by lateral branching or a reverse sequence of branching, obtaining in either case four outputs provided by pinions which mesh in pairs two large spur gears for re-combining all branches. These large spur gears are on a common shaft which is the transmission output.

Abstract: A cone drive, high output speed reducer, having a low clearance for low profile applications. An input shaft drives a helical idler pinion which in turn drives two other helical idler pinions. The two other idler pinions are each mounted on a separate shaft carrying a cone drive worm. The two worm shafts turn in unison, and the worms are each meshed with a separate worm gear. The two worm gears are operatively mounted on an output shaft. One of the helical idler pinions is provided with an adjustment means for equalizing the load sharing. That is, to provide equal loads on each of the helical pinions for load sharing throughout the twin drive gearing units of the speed reducer. The speed reducer may be provided with either an air cooling system or a water cooling system.

Abstract: An assembly for converting mirrors commonly provided on trucks so that the mirror can be adjusted from a position adjacent the seat of the driver to provide maximum visibility from the right hand mirror. A clamp mounts to the mirror and connects to an actuator positioned in the truck adjacent the seat of the driver so that the mirror may be adjusted by the driver while the driver remains in the driving position.

Abstract: A manually controlled actuating device is provided to assist in overcoming forces, which resist adjustment of the device into certain positions, and at the same time minimize operator fatigue. The device includes a shaft adjustably mounted for movement from a predetermined rest position along a fixed path and having a spring-biased multiple-input-accepting handle attached to one end of the shaft. The handle is adapted to accept push, pull and squeeze inputs. Disposed adjacent the other end portion of the shaft and in proximity to the shaft's path of movement are a pair of fixedly mounted cam plates having the surfaces thereof adapted to be engaged by a follower pin carried by the shaft.

Abstract: A mounting for a vehicle steering wheel upon a steering shaft for secure connection therebetween and wherein the wheel of molded plastic resin is susceptible of having its hub expanded or fractured by a wedging action upon being fastened to the shaft, in which a reinforcing metal washer is molded in the wheel hub to resist such expansion or fracturing of the hub by the shaft and to improve the non-rotational interlocking between wheel and shaft.

Abstract: A valve spindle drive is disclosed in which the travel of the spindle is limited by a locking mechanism. The spindle is driven by a gearing system on which locking rings are provided. Each locking ring permits rotation in one direction. Arms resiliently mounted on the valve housing carry a second pair of locking rings for mating with the rings on the gearing system. Deflection of the arms during travel of the spindle actuates switches for controlling a spindle motor drive. Movement of the spindle and gearing relative to the second pair of locking elements provides for engagement of a pair of respective locking rings to prevent further spindle travel. The other pair of rings is prevented from coupling by a cam device carried by the gearing.

Abstract: A hydrokinetic torque transmitting mechanism having a torque converter and a compound planetary gear system in which the elements of the gear system are stacked in radial disposition, one with respect to the other, to form a multiple ratio torque delivery path with minimum axial dimensions.

Abstract: Two transmission members of a planetary gear transmission in a hub of a driven vehicle wheel are driven simultaneously at different speeds in a forward or backward direction. Driven forward movement of the slower transmission member is transmitted to the hub shell by an overrunning clutch. A second clutch connects the other transmission member to the hub shell when operated by a centrifugal governor at a certain rotary speed. A control device responds to backward rotation of the transmission members, as by back-pedaling, for overriding the governor and for operating the second clutch independently of the rotary speed.

Abstract: An automatic speed ratio control system of integration servo mechanism type for a stepless transmission of an automotive vehicle. Speed ratio is controlled by a hydraulic pump motor of variable displacement type, which in turn is controlled by an actuator having a piston and a cylinder to which hydraulic oil is supplied.

Abstract: The valve adjustment tool includes an elongated barrel having a bore therethrough. The upper portion of the barrel is provided with a tool land and a length of external threads. The lower end of the barrel is provided with an integral collet which forms a nut socket. The collet is surrounded by a compression collar. An elongated internally threaded sleeve overlays the barrel. The sleeve abuts the compression collar. When the sleeve is threaded downwardly on the barrel, the collar compresses the collet. When the sleeve is threaded upwardly on the barrel, the collar is free to move and the collet assumes its uncompressed state. An elongated valve adjuster driver is also provided. The driver is provided with a large disc shaped knob at its upper end and an engagement lug at its lower end. The driver normally reposes within the through-bore of the barrel and is rotatable therein and removable therefrom. The top of the disc shaped knob provides a landing for the foot of a dial indicator.

Abstract: A gripper which automatically grips the screw cap on a jar or the like when it is moved thereinto in order to facilitate removal of the cap. It includes a motor-operated clamp which is automatically actuated by movement of the capped jar thereinto to grip the cap and suspend the jar so that, thereafter, both hands of the user are free to grip the jar and turn it relative to the clamped cap. After the jar is separated from the clamped cap, the motor may be actuated to release the cap from the clamp.

Abstract: Tatooing pincers for marking ears of animals by injection of tatooing liquid. Pincers comprise a support and first and second jaws. Second jaw carries a number of hollow needles protruding to first jaw. Second jaw is yieldably connected to a drive by an intermediate part comprising a pump chamber connected with the hollow needles. The volume of the pump chamber is reduced when intermediate part yields under increased pressure after needles have fully penetrated animals ear between jaws, and tatooing liquid in pump chamber is injected via needles. Thus increased pressure provides for cleaning of needle holes from particles of skin resulting from penetration. Tatooing liquid is sucked into pump chamber from a storage chamber via check valves. A pneumatic drive may be used to facilitate operation.

Abstract: A dual purpose tool for removing drain plugs and draining oil from vehicle oil pans.

Abstract: A novel apparatus is provided for sequentially feeding elongated workpieces in timed progression to a work performing area of a lathe. The lathe includes suitable means for grasping the ends of the workpiece once positioned within the work performing area and for rotatably driving the workpiece while performing a machining operation on the workpiece. The feed apparatus comprises a conveyor for sequentially moving the workpieces underneath the work performing area so that the workpieces are parallel to the axis of rotation of the lathe driving means but spaced downwardly therefrom. Elevator arms engage and lift a single workpiece to the work performing area whereupon the lathe engages the workpiece and performs the desired machining operation. Upon completion of the machining operation, the elevator arms return the workpiece to the conveyor. The conveyor then moves a subsequent workpiece into position for engagement with the elevator arms.