Abstract: In a two station machining vise having a stationary, center jaw and movable opposing jaws, the interior of the vise body is totally enclosed to protect the working components from machining byproducts. The vise has a brake mechanism and an offset mechanism associated with one slide so that workpieces can be engaged and released sequentially. If the brake mechanism is not activated, the two movable jaws are moved simultaneously. With the brake mechanism engaged, one movable jaw is moved to position first and then the movable jaw having the brake and offset mechanisms connected therewith is subsequently moved into position. When the workpieces are to be released, the second movable jaw is first retracted the offset distance and then the first movable jaw must be completely retracted prior to any subsequent movement by the first movable jaw.

Abstract: Clamping device for simultaneously holding several workpieces between a fixed central jaw and two endjaws situated on either side of it and joined by a threaded, lengthwise moveable spindle. A helicoidal spring surrounding the spindle urges it towards its extremity which is actuated, so that when the spindle tightened the spring elastically presses the end jaw far from the operator against a workpiece placed between said far jaw and the central jaw. This workpiece is thus immobilized even without counterpressure from the near end jaw, and need not be held by the operator who can simultaneously insert a second workpiece between the near end jaw and the central jaw with one hand and tighten the spindle with the other.

Abstract: A removable jaw assembly for a workholding apparatus having a base that defines a worksurface and a first longitudinal axis. The assembly includes an tower portion provided on the workholding apparatus that protrudes above the worksurface and defines a second longitudinal axis that is substantially parallel to the first longitudinal axis. The assembly also includes a removable jaw member that has a cavity that is sized to receive the tower portion therein such that the jaw member may be selectively longitudinally moved on the tower portion between a released position and an attached position. The tower portion includes at least one spring-biased latch member adapted to engage an engagement area formed in a wall of the cavity at right angles to the second longitudinal axis to selectively retain the removable jaw on the tower portion.

Abstract: An incremental multiple-forced vise of epicyclic gear train type mainly comprises basic components of vise's main body and movable jaw etc. to accommodate a lead screw, two sets ( i.e. double-layer ) of epicyclic gear train and a buffer device.

Abstract: A shield for use in connection with a workholding apparatus that has a base and at least two jaw members operably supported on the base for selectively clamping a workpiece therebetween. The shield comprises a plate member adapted to be removably received on the base and configured to permit at least one jaw member to move relative thereto. The plate member may be sized to provide the workholding apparatus with a worksurface that is wider than the base.

Abstract: A removable jaw assembly for a workholding apparatus having a base member with a longitudinal slot therein. The assembly includes a movable support member that has a lower portion operably supportable in the longitudinal slot such that it can be selectively axially moved therein. The movable support member has an upper portion that protrudes from the slot for supporting a jaw member thereon. A jaw retaining member is attached to the upper portion of the movable support member such that it is selectively movable between a first position wherein the jaw member is nonremovably attached to the upper portion of the movable support member and a second position wherein the jaw member can be removed from the upper portion of the movable support member. An actuation member is provided on the base member for biasing the jaw retaining member to the second position when the movable support member is moved to a disengaged position.

Abstract: A handle for a machinists vise configured to preset the maximum clamping force that can be applied to the vise jaws constructed such that, in tightening the vise, when a clamping force is applied by the operator to the handle equal to a preset value, a clutching mechanism in the handle will allow the handle to slip without further tightening of the vise. The mechanism includes a ratchet for positive engagement in loosening the vise and for providing a clicking sound that the clutch is slipping and thereby alert the operator that maximum clamping force is being applied.

Abstract: A working table fashioned as a clamping table includes a top frame supported by legs, with two plate-shaped clamping jaws or worktable portions being supported on mutually disposed frame members. One of the clamping jaws is adjustable with respect to the other clamping jaw by two adjusting spindles disposed in the frame members. To enable a more rapid clamping, provision is made that the other jaw is displaceably guided along the frame member and is equipped with locking pawls engaging locking holes provided in the frame member. The locking pawls are adapted to be lifted out of the locking holes by actuating members and are also lockable in an unlocked position.

Abstract: A clamp device for clamping a specimen holder. The clamp device includes a rotatably mounted clamping lever, a rotatable clamping wedge, and a guide member which is located adjacent to the clamping wedge for receiving the specimen holder. The clamping wedge is in operative communication with the clamping lever, so that by rotating the clamping lever, the clamping wedge is rotated into the guide member which causes the specimen holder to be clamped within the guide member. The specimen holder may be provided with a removable adapter plate wherein the adapter plate is sized to fit within the guide member. By including the adapter plate, multiple sizes and types of specimen holders can thereby be employed using the same clamping device.

Abstract: A portable or fold away workbench comprises a pair of elongate vise members which are supported from below and which are relatively movable towards and away from one another and a tool tray forming part of, or being attached to, one of the vice members. The tool tray includes a well for storing relatively large tools and a plurality of depressions, which are shallower than the well, for storing relatively small tools.

Abstract: In a wide-opening vise having two movable jaws and a fixed center jaw, the movable jaws are easily removed and reset onto associated slides. The slides have upperly projecting bodies with pressure release latches for positively fixing the jaws in position on the slides. Further, a brake and off-set assembly is associated with one movable slide. The combination allows the second movable jaw, after the first movable jaw has engaged a workpiece, to engage and disengage from a workpiece without effecting the engagement of the first movable jaw with its held workpiece. At least two off-set positions are provided for the engagement and disengagement of the second movable jaw.

Abstract: A machine tool subassembly that holds a workpiece at a predetermined position within the operating area of a machining apparatus is attached to a presetting stand outside of the machine for purposes of aligning a workpiece during the time the machine is operating on another workpiece. The presetting stand is attached to a rail on the flat top surface of a support table. The stand and rail have mating reference surfaces that correspond to the orthogonal axis of the machine. The stand includes upper and lower joint parts which engage an adjustment part of the subassembly. The joint parts include reference surfaces aligned with the machine axis so that when the subassembly engages one of the joint parts, the workpiece secured therein my be aligned along two of the three orthogonal axis of the machine. When the subassembly is connected to the second joint part, it will be aligned precisely ninety degrees to the first joint part.

Abstract: A unitary vise body is provided having a flat upper reference surface extending between opposing first and second ends. A first stationary jaw extends upwardly from the reference surface at the first end of the vise. A second stationary jaw extends upwardly from the reference surface at a location about half-way between the first and second ends. Both the first and second stationary jaws have workpiece abutment surfaces that extend from the reference surface at an angle that corresponds to the reference surface angle of a workpiece clamping extension. The area between the first and second stationary jaws defines a first clamping region and includes a movable jaw which is actuated by a threaded shaft that extends through a threaded opening in the lower portion of the jaw. The area of the vise extending from the second stationary jaw to the opposing end of the vise defines a second clamping region.

Abstract: In a wide-opening vise having two movable jaws and a fixed center jaw, the movable jaws are easily removed and reset onto associated slides. The slides have upperly projecting bodies with pressure release latches for positively fixing the jaws in position on the slides. Further, a brake and off-set assembly is associated with one movable slide. The combination allows the second movable jaw, after the first movable jaw has engaged a workpiece, to engage and disengage from a workpiece without effecting the engagement of the first movable jaw with its held workpiece. At least two off-set positions are provided for the engagement and disengagement of the second movable jaw.

Abstract: A multi-functional tool with clamping- and shaping jaws (14) is to be created, which is quickly adaptable to the respective different application uses and which can provide if need be not only high clamping- rather also high shaping forces.This is achieved by guiding the tool jaws (14) by means of guide elements (15) aligned essentially in feed or advance direction in the basic member (2) or in the trolley (3), that the tool jaws (14) are retained by means of a centered clamping element (16, 17, 19) in their working position and that, in addition to a spindle drive (5-7) for moving the trolley relative to the basic member (2), at least one additional mechanical, pneumatic, hydraulic and/or electromotive feed element (12) actuatable by a pedal (12a) is provided.

Abstract: In a wide-opening vise having two movable jaws and a fixed center jaw, the movable jaws are easily removed and reset onto associated slides. The slides have upperly projecting bodies with pressure release latches for positively fixing the jaws in position on the slides. Further, a brake and off-set assembly is associated with one movable slide. The combination allows the second movable jaw, after the first movable jaw has engaged a workpiece, to engage and disengage from a workpiece without effecting the engagement of the first movable jaw with its held workpiece. At least two off-set positions are provided for the engagement and disengagement of the second movable jaw.

Abstract: An engineer's vise (16) having a fixed inner member (20) with a stationary jaw (24) and an elongate extension (22) for inserting into and mounting to a trailer receiver (18) attached to a motor vehicle (37), thus providing a vise for use in the field. The vise has a movable outer member (30) and jaw (32) operated by a threaded shaft (34) and turned by a handle (38). The vise can be securely attached to receiver by a pin (53) in one of four positions: upright, inverted, on its right side, on its left side. It can be quickly and easily removed and stored for safe keeping.

Abstract: The present invention provides an apparatus for forming a stationary vise jaw on a vise having improved deflection characteristics when loaded from a movable vise jaw. The apparatus comprises a block having a width defined by a vise jaw end surface facing the movable jaw and an end surface opposite the vise jaw end surface, and a height defined by an upper surface and a lower surface engaging a support surface of the vise. A channel is formed generally perpendicular to the width and within the block to open to the lower surface. The channel receives a member protruding from the support surface when the block is secured to the vise. A fastener such as a bolt secures the block to the support surface wherein the fastener is located between the channel and the vise jaw end surface at a distance along the width wherein a ratio between the distance from the vise jaw end surface to a reference axis of the fastener and the distance from the opposite end surface to the reference axis is greater than 0.

Abstract: A vise having a base piece and an invertible V-block supported both laterally and downwardly on the base piece in either inverted position. A movable jaw operates toward and away from the V-block in distances in accord with the inverted position of the V-block, all to accommodate workpieces of different sizes and with only one invertible V-block which is snugly supported in lateral positions on the base piece and which is supported upwardly by shouldering on the base piece.

Abstract: A fast acting and adjustable vise is disclosed herein having an elongated base movably supporting a pair of jaws adjustable between opposing holding surfaces for releasably supporting small parts or workpieces. Manually rotatable wheels are operably coupled to each jaw for independent and separate movement along a linear path and a universal mounting device adjustably supports the vise on a supporting surface. In one form, one jaw of the pair includes a finger-operated resilient clamp for selectively and rapidly positioning the clamp to a desired location on the base.

Abstract: The clamping force adjusting device for a clamp device comprises a hollow housing (1) supported on a movable clamping part of the same, through which housing passes a rotatable and slidable tension rod (5), whose first end can be coupled to a force amplifier and whose second end (5b) carries a tension sleeve (6) fixed thereon. The tension sleeve (6) is supported on Belleville springs (9) through a thrust bearing (8) and an intermediate sleeve (b 10), the Belleville springs being supported directly in the housing (1). An adjusting sleeve (13) screws into a fine thread (14) of the housing (1) and has at its end facing the Belleville springs (9) a radially inwardly directed first stop shoulder (16), which cooperates with a radially outwardly directed second stop shoulder (17) of the intermediate sleeve (10) and/or a spacer ring (18) bearing on the thrust bearing (8).

Abstract: A machine vise with force amplifier comprises a fixed jaw (2) and a movable jaw (3) on a vise body (1, 1a, 1b), the movable jaw being adjustable by means of a threaded spindle (14). The force amplifier (9, 10, 11) is enclosed by a rotatable tightening sleeve (6), which engages by means of an external thread (7) in a female thread (8) of a housing (5) around the sleeve. Within the tightening sleeve (6) there are arranged a first tightening ring (9) fast against rotation and a second tightening ring (10) rotatable to a limited extent. A plurality of tightening pins are provided between the two tightening rings (9, 10). The stationary housing (5) is arranged in the vise body (1, 1a) beneath the fixed jaw (2). The second tightening ring (10) is fixedly connected to the one end (13a) of a pull rod (13) passing through the first tightening ring (9) and the threaded spindle (14), on the other end (13b) of which rod there engage an adjusting sleeve (21) and an operating lever (15).

Abstract: A machine vise that can serve multipurpose uses is constructed utilizing a cast base made so that it can be easily mounted for NC machining, or mounted on a swivel base, and can be used mounted on its sides or on one end. The cast base is made to simplify clamping to a tool table by providing an accessible ledge for clamping along the sides and ends. The ledge also provides a coolant drain trough. A support for the distal end of the vise screw is mounted to simplify manufacturing without losing precision operation. The same vise body can be adapted for use with interchangeable screws for manual operation of a movable jaw from either end of the vise or using a hydraulic actuator for clamping the movable jaw.

Abstract: A vise comprises two jaws formed so that at least one of the jaws is movable relative to the other of the jaws, a rotary drive pivotally connected with at least the one movable jaw so as to move the one jaw relative to the other jaw, and a one-way slip clutch located between the drive and the movable jaw so that a drive force is positively transmittted to the one jaw so as to positively move the one jaw away of the other jaw, and at the same time during movement of the one jaw toward the other jaw the clutch slips over so as to prevent excessive application of clamping force by the movable jaw on an object to be clamped.

Abstract: An improved machine vise, particularly well suited for use on milling machines and the like, having an improved arrangement for securely holding workpieces of irregular shapes or several different, diversely sized workpieces simultaneously. The vise is provided with a fixed jaw and two movable jaws mounted in a side by side relationship such that each jaw is free to move back and forth into and out of a gripping relationship with the object being clamped. The two movable jaws are yoke driven on a shaft such that a single forward thrust of the yoke exerts a forward and downward pressure to move both jaws forward while at the same time allowing for a translational motion between said adjacent jaws. These jaws can thus simultaneously grip and secure individual workpieces of different dimensions or differently sized portions or cross-sections of the same workpiece. Each jaw may also be provided with individually mounted fingers that pivot into the best gripping relationship with the object being clamped.

Abstract: A machine vise for holding workpieces on a milling machine or the like comprises a pair of movable jaws arranged to move in parallel and to cooperate with a fixed jaw for holding workpieces for machining. A yoke is pivotally mounted with respect to the jaws and operates to provide equal pressures for gripping with equal pressure separate workpieces or different parts of the same workpieces.

Abstract: Apparatus for holding two workpieces, each with respect to a fixed reference location, is disclosed. The apparatus includes a base to which a fixed central jaw member is secured. A clamping assembly which includes a first slide member and a second slide member which are joined by a threaded screw shaft is provided for movement relative to the central jaw member. A biasing means is attached to the first slide member by means of a compression spring assembly and may be either displaced with the first slide assembly or secured to the base. When the biasing means is secured to the base member and the first slide is displaced away therefrom, a biasing force is generated so as to urge the second slide member toward the central jaw to hold a workpiece therebetween. As such, one workpiece may be retained or released prior to another workpiece. Further, the instant construction provides the biasing feature without requiring any increase in overall vise length.

Abstract: A workpiece holding system utilizing an improved vise having jaws that remain parallel with the workpiece and introduce a downward force on the workpiece to retain it against a precision supporting surface with the system of this invention primarily intended for use in holding workpieces on EDM wire machines. Each jaw has a step at the bottom which is significant when used on a wire EDM machine as it provides the ability to "pick up" the location of the workpiece from four sides. The system includes a dovetail incorporated into the vise with the position of the dovetail being the same regardless of the size of the vise thereby making it possible to use two different vises in a vertical setup to hold elongated workpieces accurately and making it easy to change from one vise to another. A single adjustment block can be used for a number of vises thus reducing the overall cost of the system.

Abstract: A small size vice constructed to hold small parts while being work processed on up to three sides with one clamping of the part being work processed. The small vice uses a rigid frame design applicable for being clamped in a larger bench vice, bench mount bracket or machine table clamp having rigidity not found in small vices. The small size vice has narrow jaws and very long movable jaw travel for it's jaw width and with the jaw travel perpendicular to the clamping surfaces of the jaws. The small size vice also has an underside rigid web reinforcing substantially the length of the vice to prevent the vice from bowing from vice jaw clamping force and to provide a web for being clamped in a larger bench vice (or other clamping device) with the smaller size holding small parts being worked on over to one side of the bench vice. The two sided shoulder at the top of the underside rigid web prevents vice slip down when the small vice is clamped in the jaws of a larger vice.

Abstract: A vise has a housing block formed with a guide defining a longitudinal direction, a fixed jaw secured to the block, a movable jaw displaceable in the direction in the guide relative to the fixed jaw, and a spindle extending in the direction between the jaws along a spindle axis. A support at the fixed jaw has a formation fitting with the fixed jaw and fixing the support and fixed jaw together against relative axial displacement while permitting limited relative pivoting about a fixed-jaw axis generally perpendicular to the spindle axis.

Abstract: A clamping device comprising an elongate bar (1) a first abutment member (2) fixed in position on the elongate bar (1) and a second abutment member (3) slidably mounted on the elongate bar (1). A peg (12,17) carried by both the elongate bar (1) and the second abutment member (3) enables each to be secured to a respective jaw of a vice such that in use movement of the jaws of the vice relative to one another results in a corresponding movement of the two abutment members (2,3) relative to each other.

Abstract: A multiple purpose work station having an angularly displaceable spine of square section. The station also includes sockets for a headstock or other accessory which are secured to a nut so that rotation of a leadscrew by a handle axially displaces the headstock toward and away from a tailstock or other accessory. The latter is supported by a saddle which can be clamped in a desired position on the spine.

Abstract: A machine tool employs a workpiece guidance system comprising a pair of guide assemblies each including a stop member movable along one of the X and Y axes and a clamping element for clamping the workpiece in the stop member for movement therewith. The clamping element is movable independently of its associated stop member as well as therewith, and one stop member will provide a guide surface for the workpiece as it is moved past it by the other guide assembly. In one embodiment, the clamping element is a claw or clamp in a fixed position on the stop member and which is automatically actuable to clamp the workpiece or to release the workpiece for guided movement thereby. In another, the clamp is slidably supported in the stop member for movement relative to a base element to provide clamped guiding movement for the workpiece and also can be locked in a position to fix the workpiece therefor.

Abstract: An adjustable mandrel for grasping and supporting a workpiece such as a dental retention device. The mandrel includes a stationary jaw having a body portion with a dependent grasping leg, and a movable jaw also having a body portion with a depending grasping leg. The two grasping legs are arranged to each other. A captured screw member is rotatably secured to the body portion of the stationary jaw with the body portion of the movable jaw threadingly receiving the screw member therethrough. A pair of guide rails maintain a parallel relationship between the stationary and movable jaws. As the screw member is rotated, the movable jaw moves into and out of engagement with the stationary jaw to grasp a workpiece with the grasping legs, where either external or internal surfaces of the workpiece can be grasped.

Abstract: In precision machining, a workpiece can be rapidly located with respect to three mutually perpendicular datum planes by positioning it within both a main machine vise and a supplemental machine vise held within the main machine vise, with the supplemental machine vise being one that has an overall length extending beyond the grip of the main machine vise, ground and polished planar side surfaces adapted to be positioned so that one of them is in contact with the substantially planar ground and polished bed surface of the main machine vise, and a ground and polished substantially planar base surface on the supplemental vise, which is adapted to be abutted, usually but not necessarily in a vertical position, against the working interior face of the fixed jaw of the main machine vise.

Abstract: A machine vise for clamping a workpiece between a stationary jaw fixed to a body, and a movable jaw provided on a movable member which is moved relative to the body by a rotating motion of a feedscrew member which is rotatably supported by a support portion formed on one of the body and the movable member, the feedscrew member having an externally threaded portion engaging an internally threaded member provided fixedly to the other of the body and the movable member. The feedscrew member includes a radially outwardly extending flange portion which prevents the feedscrew member from moving in the axial direction relative to the support portion, due to a reaction force which is produced upon clamping of the workpiece. The machine vise includes a strain detector device disposed between the support portion and the flange portion of the feedscrew member, for detecting an axial force which is exerted on the support portion via the flange portion and the detector device due to the reaction force.

Abstract: A specimen holder clamp for a microtome comprising a fixed jaw which is fixed relative to a guide member and a movable jaw which is movable along a path defined by the guide member. The clamp is provided with a first infinitely adjustable rack, and the movable jaw carries a second complementary incrementally adjustable rack for coupling engagement so that when the second complementary incrementally adjustable rack engages with the first infinitely adjustable rack, fine adjustment of the clamp can be effected, and when the second complementary incrementally adjustable rack is disengaged, coarse adjustment can be effected. The second complementary incrementally adjustable rack is normally biased into engagement with the first infinitely adjustable rack.

Abstract: A vise for holding workpieces for precision machining which allows rapid set up, consistent workpiece orientation during machining and rapid cleanup. A stationary jaw providing a reference surface close to the operator, is removeably attached to a supporting structure. A moveable jaw is translated by a threaded shaft passing through the fixed jaw. Grooves of the supporting structure guide the movable jaw's translation. Axial clamping loads are transmitted from one jaw to the other directly by the threaded shaft rather than the support structure. The grooved supporting structure only provides resistance to moments tending to bend the shaft. The stationary jaw is readily removable allowing reversal, replacement or cleaning. Removal of the stationary jaw allows easy removal of threaded shaft and moveable jaw for replacement or cleaning without unthreading. Very high precision can be obtained by moment resisting design of the jaw assemblies.

Abstract: A dual vise is disclosed which has first and second vise assemblies. The vise assemblies have centrally fixed stationary jaws and independently controlled moveable jaws, each vise assembly being capable of holding a work piece under a pressure which is independent of the holding pressure for the other vise assembly, The pressure for each vise assembly is under the control of the operator. The moveable jaws are preferably controlled by concentric lead screw shafts. When used in conjunction with numerical control equipment, productivity is increased and damage to individual work pieces is reduced.

Abstract: An adjustable jig incorporating combined magnetic and mechanical means for adjustably mounting the jig on a workpiece support whereby the jig may be utilized to locate and maintain the correct positional relationship between components of work during assembly and manufacture thereof.

Abstract: In a sheet holding apparatus having a pair of parallelly disposed rails (17, 18) for sliding a sheet, such as a printed board, and plural guide holders (38, 42) having plural positioning guide pin (40, 44) to be inserted in holes of the printed wiring board, distance between the pair of rails (17, 18) is changed by a screw shaft (20) which is rotated by a driving motor (32) responding to change of size of the sheet, and a spline shaft (36) is disposed along the rails (17, 18), and the guide holders (32, 42) are provided to be slidable on the spline shaft (36), which puts up and down the guide holders (32, 42), hence positioning guide pins (40, 44) above and below a level of carrying plane of the sheet by rotation thereof.

Abstract: A machine tool employs a workpiece guidance system comprising a pair of guide assemblies each including a first stop member movable along one of the X and Y axes and a clamping element a second stop member for clamping the workpiece against the first stop member for movement therewith. The second stop member element is movable independently of its associated first stop member as well as therewith, and each stop member will provide a guide surface for the workpiece as it is moved past it by the other guide assembly. The machine tool also includes a computer system control for operating the motors which drive the guide assemblies.

Abstract: For use with a low profile vise assembly of a type adapted to be carried on the support table of a milling machine or similar equipment, an operating handle engages a drive nut portion of the vise screw and extends diagonally away from the axis of the screw at a relatively low angle whereby the outer end of the operating handle is free to rotate continuously through 360.degree. so as to quickly move the sliding jaw of the vise.

Abstract: A vise jaw for attachment to a vise jaw support which includes a first plate for attachment to the vise jaw support in place of the standard vise jaw and having a plurality of vertically elongated openings formed therein and a second plate overlying the first plate and having a plurality of pins extending therefrom and engaging the openings in the first plate, a spring carried by the first plate and engaging at least one pin to urge the second plate to a normal uppermost position and a structure carried by the first plate and operable to engage one of the pins in an opening therein to urge the second plate downwardly when a work piece has been fastened in the vise.

Abstract: A workbench comprises a worktop supported by a collapsible leg arrangement, the worktop being adapted to support a vice comprising separate fixed and movable vice jaws. The worktop is formed with elongated slots at predetermined locations each adapted to receive a depending hook-like formation of a fixed vice jaw. The worktop also is formed at predetermined locations at its edge and extending inboard of the latter elongate recesses into each of which movable vice jaws can be located and secured by complementary formations at the inboard ends of the recesses and movable vice jaws. The separate fixed and movable vice jaws are secured in an operational working relationship by the worktop and such relationship can be varied.

Abstract: A workbench having a pair of vise assemblies mounted on a frame with each vise assembly having a movable jaw and a fixed jaw, wherein one vise assembly is operable with a lead screw to move towards and away from the other vise assembly which is fixed and arranged parallel to the movable vise assembly. Each movable jaw is operable with a screw threaded rod to move towards and away from each corresponding fixed jaw, and is capable of swivelling so as to enable the clamping of an irregularly shaped workpiece between the fixed and movable jaws. The pair of vise assemblies with their frame are mounted on a collapsible supporting structure which may be folded when not in use.

Abstract: An adjustable jig incorporating combined magnetic and mechanical means for adjustably mounting the jig on a workpiece support whereby the jig may be utilized to locate and maintain the correct positional relationship between components of work during assembly and manufacture thereof.

Abstract: A workpiece holding vise (10) uses a pair of jaw assemblies (12, 14) simultaneously driven in opposed reciprocation by a single shaft (26) having oppositely threaded sections to automatically center a workpiece (60) beneath a tool. Both jaw assemblies (12, 14) are suspended above the vise bed (20) by a pair of parallel guide shafts (56, 58) attached to the vise bed. Linear rolling bearings (54) fitted around the guide shafts and firmly held by opposite ends of the jaw assemblies (12, 14) provide rolling friction between the guide shafts (56, 58) and the jaw assemblies (12, 14). A bellville washer (46) at one end of the drive shaft (26) and thrust bearings at both drive shaft ends hold the shaft in compression between the vise bed (20), thereby preventing wobble of the jaw assemblies due to wear between the shaft and vise bed.

Abstract: A combination vise that comprises a box construction frame that has three side surfaces for supporting the vise so that the jaws can be placed perpendicular to the table surface by laying the vise on either side and clamping it in position, or the jaws can be positioned on the top of the vise in a normal manner when the vise is set on its bottom.The three side surfaces of the vise which do not carry the jaws are machined so they will lay flat on a machine tool table and properly orient the jaws when the vise is clamped on any one of the three usable sides.

Abstract: A vise is cantilever mounted to a workbench, projects forwardly thereof, and is disposed below the extended plane of the workbench table top. The vise includes a pair of U-shaped brackets, secured to the underside of the table top, and a pair of tubular beams slidably received in the respective brackets. Each of the beams is selectively indexed to its cooperating bracket, thereby providing a "coarse" adjustment. A fixed rear vise jaw is disposed on top of the beams, transversely thereof; this rear vise jaw is secured to the brackets and abuts against the lower portion of the longitudinal front side of the table top. A movable front vise jaw is mounted on top of the beams, transversely thereof, and may be moved in a non-parallel relationship with respect to the fixed rear vise jaw for clamping tapered workpieces therebetween.