Abstract: A clamping device for clamping a workpiece having a center hole, comprises a base member against which the workpiece can be seated, such that the center hole of the workpiece is aligned with a center aperture in the base member. The base member carries outer clamps for clamping an outer portion of the workpiece against the supporting surface. A push member projects through the hole and aperture and carries inner clamps for clamping an inner portion of the workpiece. An actuator displaces the push member for moving the inner clamps to their clamping position, whereupon the push member pushes the outer clamps to their clamping positions. A spring -biased ejector pushes the inner and outer clamps to their non-clamping positions, and ejects the workpiece when the actuator is moved to a release position.

Abstract: A power chuck includes a body, a plurality of work engaging jaws, a plurality of rocker arms carrying the jaws, and a plurality of swivel mountings connecting the rocker arms to the body. The power chuck also includes a plurality of slide members connected to and matingly engaging the rocker arms and a reciprocable actuator disposed centrally of the rocker arms and operatively cooperating with the slide members. Reciprocatory movement of the actuator along the slide members rocks the rocker arms in the swivel mountings and moves the jaws radially relative to each other.

Abstract: A bar puller for a numerically controlled turret lathe having a mounting member for mounting the bar puller to one of the stations of a rotary turret on the lathe, the bar puller having a pair of gripping jaws that are pivotally mounted between clevis plates on pivot pins and biased by a plurality of compression springs, the jaw blocks carrying adjustable gripping members that engage the end of a bar stock and draw the bar stock in the chuck on displacement of the turret carriage with the gripping jaws being released by further displacement of the turret carriage after a chuck has been secured on the stock.

Abstract: A chuck is disclosed which has article gripping member each having a pivot portion intermediate its ends about which the member pivots as the chuck is opened and closed. The members are each caused to pivot by a pin which passes through a slot in the member adjacent the inner end of the member remote from the workpiece gripping outer end thereof. Movement of the pin lengthwise of slot causes the member to pivot. The slot in which the pin is seated is elongated lengthwise of the member and is inclined to the central axis of the member at a very minor angle whereby the centrifugal forces generated by operation of the chuck cannot generate sufficient force to cause the pin to move lengthwise of the seat and thus permit the jaw to release the workpiece.

Abstract: Apparatus is disclosed for holding a generally cylindrical workpiece for honing or otherwise machining an internal bore. The workpiece is held by a gripping surface over most of the innermost turn of a spirally wound torsion band coil. The workpiece is grasped circumferentially over its outer surface without excess contact pressure at any particular point. A tendency of the machining operation to rotate the workpiece serves to secure the workpiece more tightly in position by tightening the outer turns of the tension band coil. A rotatable tensioning member acts under the influence of a biasing spring to decrease the diameter of the innermost turn of the tension band coil to bring the gripping surface into contact with the workpiece. The outer diameter of the tension band coil is variable under the influence of a plurality of segmented support members which are adjustable radially inward and outward to extend the range of utility of the tension band coil.

Abstract: A chuck has a chuck body generally centered on and rotatable about a rotation axis, a head displaceable on the chuck body generally perpendicular to the rotation axis, and three jaws angularly generally equispaced on the head about a clamp axis offset from and substantially parallel to the rotation axis. All of these jaws are displaceable on the head generally radially of the clamp axis. An actuator is connected to the jaws for synchronously displacing same generally radially toward and away from the clamp axis. The actuator includes an actuator member displaceable axially in the head and provided with respective actuating surfaces inclined to the clamp axis and engageable with the jaws. Two of the jaws are pivotal about respective jaw axes parallel to the axes and the other jaw is displaceable in a plane substantially including the clamp and rotation axes.

Abstract: A chuck and methods of chucking or clamping a workpiece for multiple machining operations without requiring rechucking or repositioning of the workpiece employs an arcuate cradle for supporting the workpiece with an abuttment at one of its ends. The workpiece is slid along the cradle until one of its ends is stopped by the abuttment, and then a jaw is pivoted against the other end of the workpiece to securely clamp the workpiece under hydraulic force derived from a machining tool to which the chuck is attached.

Abstract: An electrode tip replacement apparatus for a welding gun comprising a housing having a through-hole through which an electrode tip attached to a gun arm of a welding gun can be inserted, a chuck member in such through-hole and having a ring shaped cam rotated by a driving source and a plurality of chucking claws pivotally attached for engaging and rotating an electrode tip inserted through said through-hole for removing the electrode tip from the welding gun arm.

Abstract: A chuck device comprises clamp elements having, at one end, an underlying tooth and a conical surface conjugated with the surface of a centrifugation cell. The clamp elements are uniformly distributed on the circumference of a plate including a surface upon which the bottom of the cell rests. The clamp elements are pivoted on the plate so as to be rotatable in radial planes, and can be locked in the closed position.

Abstract: In chucking, a workpiece is clamped while drawn to the chuck body for positive contact of the workpiece to stoppers, whereby a degree of machining accuracy is remarkably improved.

Abstract: A rotatable chuck workpiece for a power driven threading machine is disclosed comprising a tubular spindle having front and rear ends and front and rear workpiece engaging jaws respectively at the front and rear ends. Each front jaw is connected to a corresponding rear jaw by a rod to which the jaws are rigidly attached, and the rods are mounted on the exterior of the spindle for rotation therewith and for pivotal movement relative thereto. A drive plate at the front end of the spindle is mounted coaxially thereon for pivotal movement relative to the spindle and is provided with drive pins interengaging with slots in the front jaws, whereby pivotal movement of the drive plate in opposite directions imparts pivotal movement of the front jaws radially inwardly and outwardly of the spindle axis.

Abstract: A coaxial collect truck is disclosed having at least two clamping jaws which are radially adjustable by a respective chuck lever, whereby every chuck lever is connected to a respective stationary base part at one end by a first spring joint and is connected to a set collar at its other end by a second spring joint. The set collar is capable of engaging and releasing the clamping jaws by being rotatably seated at the base part by a respective third spring joint. Coaxial clamping in the sub-micrometer range is thereby achieved for precision round parts, particularly of plug pins for the releasable connection of optical fibers of light waveguides, whereby all chuck levers, base parts, first, second and third spring joints as well as the set collar are fashioned of one piece from a common plate.

Abstract: A bone vise for holding a bone or bone fragment immobile during surgery to enable a surgeon to perform desired sculpting or other operations thereon. The vise includes a planar base member with an integral threaded post upstanding from its central portion and a platform threadedly received on the post. A plurality of elongated gripper members are pivotally mounted intermediate their ends on the platform about axes which are tangent to a circle whose center lies within a bone receiving and engaging region. Each gripper member has a toothed surface at one end adjacent the bone receiving and engaging region and a cam surface at the opposite end weight biased into engagement with the base member. Rotation of the platform in one direction causes movement thereof away from the base member and enlargement of the bone receiving and holding region for insertion or removal of the bone.

Abstract: An assembly is provided for supporting semiconductor wafers individually within a support while permitting processing of both faces of a wafer as well as facilitating rapid insertion and removal of wafers into the support. Each assembly includes a wire clip having an arcuate tip used to grasp the wafer. The wire clip can be moved in two planes by actuating mechanisms, thereby moving the clip out of the plane of wafer processing and facilitating loading in the wafer processing plane.

Abstract: A sample chucking apparatus including a clip provided at a plurality of positions correspondingly to a sample and operating closedly to release and hold the sample, with the clip being acutated by a magnetic force. A spring force counters the direction in which the clip operates, thereby simplifying the structure and ensuring a reliability on fixing or carrying of the sample.

Abstract: A drive mechanism for rotating a crankshaft in a machine tool for working on the crankshaft includes a disc rotatable about a horizontal axis coincident with the crankshaft axis, the disc having a radial slot to receive a throw of the crankshaft. An endless flexible drive belt extends around a greater part of the periphery of the disc except for an upper part of the disc periphery and around a drive device to rotate the disc and with it the crankshaft throw in the radial slot in the disc. The crankshaft can be inserted in and removed from the disc when the disc is orientated with the slot vertical and when rotated away from the vertical, the crankshaft throw is retained in the slot by reason of the endless drive belt extending over the slot.

Abstract: A tool for holding a workpiece to be machined on a CNC lathe or other device which includes an integral or separately powered draw tube. The tool includes two rods which are spaced from but pivotally connected to the draw tube. The rods extend through a fixed tooling surface for releasable engagement with a clamping plate. When the rods are drawn in by movement of the draw tube, a properly positioned workpiece is retained between the tooling surface and the clamping plate for machining. Movement of the draw tube in the opposite direction releases the workpiece.

Abstract: The telephasing method and system identify an unknown phase within a polyphase network by comparison of the unknown phase with a known reference phase of the polyphase network. The system is especially designed for carrying out the identification of the unknown phase when the reference phase is located at a point of the polyphase network far from the point where the unknown phase is located. The system comprises a first device connected to the reference phase and a second device connected to the unknown phase. The first and second devices each comprise a modem for establishing a telephone connection between the two devices. The first device includes circuitry to produce a digital signal representative of the alternating voltage of the reference phase. This representative signal is transmitted through the two modems and the telephone connection from the first to the second device. The second device comprises circuitry to produce a digital signal representative of the alternating voltage of the unknown phase.

Abstract: A releasable tool holder (75) for quickly interchanging tools usable by a conventional robot (50) having one or more articulatable arms (60, 65, 70). The tool holder (75) is mounted to an arm (70) of the robot (50) and is provided with a plurality of variable fulcrum clamping levers (110) capable of engaging a surface (215) of a ring (205) mounting a preselected tool. A fluid motor (95) is connected to a translatable center link (105) that is pivotably attached to the variable fulcrum clamping levers (110) whereby when the motor (95) causes the link (105) to translate, the variable fulcrum clamping levers (110) engage the surface (215) of the tool mounting ring (205). A novel tool mounting ring (205) and a releasable fluid coupling (125) are also provided.

Abstract: A chuck for holding an optical fiber in precise position includes first and second contiguous V-grooves, a chuck cover having a plurality of inter-leaving fingers for urging an optical fiber into the first V-groove so as to roughly position the optical fiber, and a plate for subsequently urging the optical fiber into the second V-groove for precise positioning of the optical fiber. The second V-groove is much smaller than the first V-groove and has a width which is less than the diameter of the optical fiber.

Abstract: In a power chuck including jaws moved by drivers which are displaceable in the axial direction of the chuck body by means of an axially displaceable actuating member mounted in the chuck body, the actuating member is coupled to the individual drivers through two gimbal rings which compensate for unequal displacement of the jaws. The gimbal suspension can be bridged by connecting the rings rigidly to each other. A balanced as well as centric clamping of a workpiece may thus be effected. The manufacturing costs are low so that both economy and high reliability in operation are obtained.

Abstract: Apparatus is provided in which a colleting and spindle assembly for lifting and rotating a substrate mounting chassis within a high vacuum sputtering chamber is mounted. Lifting and clamping action is accomplished utilizing rolling contact between surfaces produced by rotating a minor shaft with an eccentrically mounted bearing within and relative to a major shaft. A pneumatically-actuated piston mounted on one end of the major shaft drives an internally mounted high helix screw which is prevented from rotating relative to the major shaft thereby producing linear motion of the helix screw in a helix nut resulting in rotational motion of the helix nut relative to the major shaft. The rotational motion of the helix nut is coupled to the minor shaft causing it to rotate relative to the major shaft. Once the spindle assembly has been coupled to the substrate mounting chassis, the major shaft couples rotational motion to the substrate mounting chassis from outside the chamber to inside the chamber.

Abstract: Pneumatically operated clamping apparatus provides free floating mounting of a disc upon a shaft during grinding and polishing of the disc.

Abstract: A chuck with radially reciprocating jaws is disclosed wherein each jaw is supported on a jaw support member movable relative to a base. An actuator is axially disposed in the base for axial reciprocation, the actuator having pivotally connected first and second links which extend radially from the actuator to engage the jaw support member. An eccentric cam connects each of the links to the jaw support member so as to translate the axial motion of the actuator into radial motion of the jaw member. One of the eccentrics has a fixed defined axis with respect to the base, while the other eccentric is received in bushings which are axially slidable with respect to the base.

Abstract: This invention relates to chucks. Increasing effective operational rotational speeds of chucks, while reducing loss of gripping power due to such speeds, is achieved by a chuck with a wedge unit (13) having a greater expansion rate than that for a master plate unit (14). A master jaw (63) is balanced upon a master bearing (57) carried by the master plate unit and rocks thereon upon actuation of the wedge unit.

Abstract: This invention pertains to an auxiliary jaw which is adapted to be affixed to a movable member and as this movable member is advanced to and from a workpiece to grip and hold this workpiece when and while the auxiliary jaw is advanced. This auxiliary jaw includes a pivoted jaw member carried by a support member which is preferably secured to the movable member by cap screws. The pivoted jaw member engages the surface portion of the workpiece in local areas as it exerts a gripping force urges the workpiece toward the support surface. Three configurations of jaw assemblies are shown. Each has a pivoted jaw with one configuration supporting the workpiece above the pivoted jaw. In a second configuration the support as a pin means is below the pivoted jaw and in yet a third configuration the pivoted jaws are movable toward and to a support disk for multiple workpieces. Soft jaws, hardened jaws and bias means may be used to bring the pivoted jaw to the desired condition.

Abstract: A self-energizing lathe chuck is provided with a pair of interiorly mounted clamping shoes which serve to grip a piece of stock directed through an aperture in the chuck so as to retain the stock in a desired working position. The clamping shoes are mounted to a pair of pivot plates which rotate within slots provided in the chuck, and a spring is utilized to bring the clamping shoes into engagement with the stock so as to retain the same in a working position. A movement of the stock through the chuck in one direction results in the clamping shoes being released from engagement with the stock, while any attempted movement of the stock in the reverse axial direction is prevented by the engagement of the clamping shoes with the stock.

Abstract: According to the present apparatus work pieces such as railroad wheels are power clamped on a cone shaped inwardly facing side. In a first clamping step clamping areas are impressed into the side or surface of the work piece said clamping areas having a suitable inclination. In a second clamping step the actual power clamping is performed at these clamping areas. For this purpose a plurality of radially moving clamping jaws are arranged to carry at least one clamping tooth. Each clamping tooth in turn is adjustable in its position in an axial direction along its respective radially moveable clamping jaw.

Abstract: A lathe chuck jaw for a lathe chuck having a radially moving actuator which radially moves the jaw in to and out from the workpiece. A jaw base part is rigidly connected to the actuator. A jaw shoe part is rotatably attached to the base part. The shoe part has a workpiece-comforming surface which can hold the workpiece. The rotatable attachment of the shoe part allows it to match the general orientation of the workpiece, including a nonlongitudinal orientation due to a workpiece's imperfect shape.

Abstract: A multiple jaw holding chuck (10) is provided which is quickly and easily adjusted to grip workpieces (W) on either the interior or exterior surfaces thereof. The holding chuck comprises a housing (12) having a plurality of bores (34) formed therein in which shafts (38) are rotationally received. The shafts carry jaws (50) on the free ends thereof and are quickly and easily removed and/or repositioned in the bores.

Abstract: An assembly is provided for protectively supporting semiconductor wafers individually within a support while permitting processing of both faces of the wafer, as well as facilitating rapid insertion and removal of wafers into the support, and movement of wafers between processing stations. The assembly includes a plate-like support through which is defined an aperture of diameter larger than the wafer, and a plurality of clips mounted within the periphery of the aperture and the plane thereof and resiliently gripping edgewise a wafer inserted into the aperture and supporting same within the plane of the aperture. Each clip extends centrally inwardly of the aperture and terminates in an arcuate portion within which the edge of the wafer is retained, and defines a flat portion generally parallel to the aperture plane.

Abstract: A chuck for a rotary tool includes a body having a cylindrical bore for receiving the shank of a work performing member. A sleeve surrounds the body and forms an annular space in which is disposed a pair of opposed jaws which extend through opposed slots in the body for forcibly engaging the shank. The jaws each include an integral lever and an outer edge forming a fulcrum about which the levers are pivoted to force the jaws into engagement with the shank. A nut with a conical cam surface is threadedly disposed on the body and engages the levers in response to manual turning of the nut to clamp or release the shank.

Abstract: A chuck, especially for a device for machining pipes and the like as for instance for threading, deburring, cutting and similar operations, with chucking jaws pivotable about an axis substantially parallel to the axis of the chuck for chucking the workpiece to be machined. The chuck is mounted on a rotatable support, and the chucking jaws are positively connected to the driving motor so that the chucking jaws automatically move into their chucking position in response to the start of the motor.

Abstract: A work driver chuck having face and actuator plates interconnected by the pivot shafts of work holding cam jaws carried by and journaled for rotative movement in the face plate. Although normally centered on the rotational axis of the chuck, the assembly of plates and jaws is released for limited universal free floating movement during the actual work clamping operation to compensate for eccentricity of or surface irregularities in the workpiece. The actuator plate is slidable relative to the face plate and is operative as it moves to turn the jaws angularly into or out of engagement with the work.

Abstract: A chuck assembly for gripping and holding objects including a base, a face plate rotatably mounted on the base, and a plurality of arms pivotally connected to and extending outwardly from the face plate for swinging toward and away from each other. A threaded tube is secured to the face plate and a nut on the tube is operable to urge the face plate into frictional engagement with the base to secure it in a selected position. A threaded rod extends through the tube and has a semi-spherical washer pivotally mounted thereon. Connecting members extending inwardly from the arms engage portions of the washer. A nut on the threaded rod is operable to draw the washer toward the face plate to swing the arms toward each other. During swinging of the arms toward each other the washer may pivot on the rod to permit the arms to swing toward each other at different rates to grip and hold an asymmetrical object therebetween.

Abstract: Small electrical resistors, such as are used in circuits of comparatively low power, are automatically fabricated on a winding machine including a chuck assembly for facilitating the start and finish of a winding operation. The chuck assembly consists of a first jaw rotatably mounted with respect to a second jaw from a wire receiving position to a wire gripping position. The chuck is closed to grip a resistance wire at the start of a winding operation and an automatic welder operates to weld the wire to a metallic terminal cap positioned at one end of a resistor core. Upon completion of the welding operation, the jaws of the chuck assembly are opened and a winding head operates to rotate the resistor core to begin a winding operation. The winding operation continues for a preset number of turns at which time the jaws of the chuck assembly are moved to a closed position to clamp the resistance wire.

Abstract: Apparatus for rotating a cylindrical workpiece to be machined, having one or two automatic clamping devices on a rotatable hollow driven shaft into which the workpiece is inserted. Each clamping device has three chuck jaws mounted to swing into clamping engagement with the workpiece. Two pivots are provided for each jaw which swings about one or the other of them depending on the direction of rotation: the provision of two pivots gives a smaller and less cumbersome apparatus. To make the pivots swing into clamping engagement, a floating drag plate is freely rotatable on the shaft adjacent the clamping device. It is braked, to restrain rotation with the clamping device but it is positively linked to each jaw by a gudgeon pin, so that on rotation of the clamping device the braking restraint on the floating drag plate is transmitted to the jaws and urges them into clamping engagement with the workpiece.

Abstract: A pair of eccentrically pivotally mounted vise arms on a base plate element disposed concentrically on a rotatably driven drillhead are urged by centrifugal force during rotation into lockable gripping contact with a drill steel element held in the drillhead.

Abstract: The invention provides a pipe jack for pulling a pipe lengthwise through the ground without the necessity of excavating the ground to create a trench first, the jack including a number of hydraulic rams coupled to a set of jaws, and the jaws being hydraulically displaceable to clamp a pipe disposed between them.BACKGROUND OF THE INVENTIONThis invention relates to pipe jacks, which are known devices for use in hauling pipes, cables and the like through the ground. By disconnecting a length of pipe or like at both ends, and then pulling the pipe lengthwise, the expense and labour of creating a trench, that is removing earth from above the pipe, can be avoided. In cases where the pipe runs below a surfaced road, pavement or the like, additional substantial costs in resurfacing are avoided. A new pipe may be installed in similar manner for example by attaching the same to the trailing end of the old pipe being removed, or by threading the new pipe into the orifice created by withdrawing the old pipe.