Abstract: A chuck of the type having a body with a plunger that moves axially and is operably connected with wedges that move the jaws radially in response to movement of the plunger. The body is formed with guide surfaces, which maintain contact with the plunger at all times, and also with bearing surfaces which support peripheral surfaces of the wedges.

Abstract: The jaws of the chuck include a base jaw and a separate, releasable mounting jaw. These two jaw components are connected by at least one shaft which is guided with male-type screw threads in its one end in female-type screw threads of the base jaw. The other end has a lock head which has a projecting lock shoulder, and which lock head can engage in axial direction into a lock retainer in the mounting jaw, when the shaft has been rotated into the position corresponding to the unlocked condition. When the shaft has been rotated into the position which corresponds to the locked condition, it can engage with its lock shoulder in a dovetail formation in axial and positive locking manner. The shaft is further shaped with gear teeth which can operate in the manner of a pinion. In the apparatus there is also provided a control bolt extending transversely to the axis and guided and adapted to be shifted in its longitudinal direction in the base jaw.

Abstract: A system for holding workpieces during machining providing a plate to which the workpiece can be rigidly secured. The plate, on its rear face, has a central frusto-conical boss which seats into a complementary central recess in a support member. The support member has plural, radially reciprocal latch members which engage pockets in the boss. A ring rotatably mounted on and surrounding the support member is operatively connected to the latch members for simultaneously extending and retracting them.

Abstract: A workholder for a machine tool or the like having a power assembly and a work gripping assembly that are separable to permit use of a plurality of work gripping assemblies and associated work gripping jaws of a size and shape to accommodate different workpieces. Work gripping assemblies with jaws pre-qualified to different workpieces can be exchanged quickly and automatically, as by use of a robot, when different parts are to be machined, while a single power assembly remains connected to the machine tool.

Abstract: Chuck provides for each jaw an action bar extending substantially longitudinally of the chuck axis and rockable in an action plane radiating from the chuck axis and intersecting the jaw, and a pair of first and second slides for each action bar, with said slides being guided for movement in the associated action plane in opposite directions normal to the chuck axis, with the first slide pivotally supporting the bar intermediate its ends about an axis normal to the action plane, the second slide having with one end of the bar a floating pivot connection with its pivot axis extending normal to the action plane, and the other end of the bar having with the jaw a floating pivot connection with its pivot axis extending normal to the action plane, so that on moving the first slide relative to the other slide in opposite directions the bar is rocked about its floating pivot connection with the second slide as a fulcrum for opening and closing the jaw, and on moving the second slide relative to the first slide in opp

Abstract: A lathe workholder which allows a conventional three jaw chuck to turn quadrilateral stock having a first unitary workholder member interposed between two of the jaws and the stock and having a crotch portion which straddles two sides of the stock; a second workholder member interposed between the remaining jaw and the stock and diametrically opposed from the first member and having a crotch portion which straddles the remaining two sides of the stock, so that the conventional three jaw chuck can be utilized to retain quadrilateral stock and lathe down time is reduced.

Abstract: A three-jaw chuck of a lathe is adapted to rectangular or square-shaped work pieces by a U-shaped adaptor placed on one of the jaws. The adaptor may be adjustable as to the distance between the jaw tip and the support surface for the workpiece. Alternatively, a set of adaptors of differing thickness can be provided for purpose of selection on a case-by-case basis.

Abstract: To firmly retain the jaw of a lathe chuck against movement it is provided with a locking mechanism having a pair of locking members arranged to bear on the chuck face, and an actuating means adjustably mounted on the jaw so as to force the locking members against the chuck face for locking the jaw in a fixed position relative to the chuck.

Abstract: A chuck assembly having jaws to grip an annular work-piece on its outer periphery while machining other surfaces including a face and bore and an expansible element to grip the bore surface of the annular work-piece while machining the outer surfaces and a face, with mechanism for actuating the jaws and expansible element alternately, the parts supporting the jaws and expansible element comprising an assembly adapted for mounting on the headstock of a lathe to permit machining of the work-piece by tools carried on the tool holders normally present in a lathe.

Abstract: Rotating and positioning tool for axially symmetrical workpieces, especially for steering tie rods in motor vehicles. A housing with a recess for the introduction of a workpiece accommodates a clamping mechanism with a crown gear that is positioned and driven at its circumference. An empty space inside the crown gear communicates with the outside through an access slot. The space is demarcated by a contour. Three tension rollers are accommodated inside the empty space in such a way that they can be displaced radially inwardly against the force of springs. The rollers roll along the contour. The distance of the contour from its axis of rotation continuously varies through alternating maxima and minima. As the crown gear rotates, the tension rollers are forced in from a starting position where the distance is maximal and securely clamp the workpiece, which is located at the axis of rotation.

Abstract: A drill chuck for a hammer drill apparatus or the like having a plurality of clamp jaws advanceable to and retractable from a chuck drill axis so as to be able to grasp and hold a drill, wherein each of the clamp jaws is advanced into and retracted from a chuck opening in the chuck in a feed channel directed toward, and preferably perpendicular to, the chuck drill axis and further oriented so that the clamp jaws engage and hold the drill in the chuck opening when advanced in the channels, each of the feed channels being conformed so that each of the clamp jaws fits movably, but sufficiently tightly, therein so that drilling dirt does not penetrate between the clamp jaws and the surfaces of the feed channels, and the drill chuck is provided with a plurality of open cleaning passages connecting the interior wall of the chuck opening adjacent a mouth of one of the feed channels to the outside through the chuck.

Abstract: A chuck for gripping long hollow workpieces has two independent sets of jaws actuated to the work-gripping and releasing positions by two independent puller plates. The puller plates are spring biased to shift the jaws to the work-gripping position. A single axially shiftable actuator has a lost motion connection with each puller plate to shift the jaws to the work-releasing position. The actuator also operates a safety latch which prevents accidental axial displacement of the workpiece on the chuck and a radial jack which provides radial support to a section of the workpiece subjected to a radial machining load.

Abstract: A power operated chuck comprises a rotatable chuck body having a plurality of clamping jaws which are radially movably mounted on the chuck body. An axially movable piston on the chuck body is moved by a moving mechanism which includes several hooks or hook members having wedge-shaped interengaging surfaces for effecting relative movement therebetween. The chuck body has a plurality of recesses with counterweights which are slidably movable or pivotally movable in the recesses. The cover covers the recess adjacent an end of the chuck body. A pressure member alongside each of the counterweights is laterally offset relative to the center of gravity of the associated counterweights and is mounted in the chuck body for rotary movement in a manner such that the centrifugal forces produced by rotation of the counterweights at the chuck body are applied against the exterior of the piston adjacent the wedge-shaped portion of the hooks.

Abstract: The chuck disclosed has three radially movable jaws for gripping and releasing a workpiece. The jaws are displaced radially by means of a draw-bar actuated puller plate coupled to the inner ends of inclined, radially extending rods on which the jaws are mounted. The puller plate is swivelly coupled to the drawbar and to the jaw rods to enable the jaws to firmly grip a workpiece around a surface which is not concentric to a previously machined centering surface on the workpiece and by means of which the workpiece is positioned on the chuck. Means are provided for optionally preventing swiveling movement of the puller plate.

Abstract: A workpiece chuck has a plurality of support blocks adapted to be mounted on the front face of the chuck body in circumferentially spaced relation and at various locations spaced radially different distances from the central axis of the chuck. Within each support block a jaw rod is arranged for sliding movement along an axis inclined at an acute angle to the central axis of the chuck. A coupling interconnects the inner end of each jaw rod with an axially displaceable puller plate within the chuck body. The front plate of the chuck and the puller plate are formed with registering, radially elongated openings to permit radial adjustment of the jaw rods and to enable them to be retracted outwardly from the chuck body together with their support blocks.

Abstract: To firmly retain the jaw of a lathe chuck against movement it is formed with a transverse passageway or hole through it about midway of its length, a U-block is inserted in it in an inverted position so its legs will bear on the chuck face and a bolt is threaded in the jaw directly above the U-block so it will bear on the block and force it against the chuck face.

Abstract: A chuck selectively convertible between two different configurations for either externally gripping a workpiece while simultaneously pulling same down against stops or internally gripping a workpiece while simultaneously pulling same down against stops. The same components of the chuck mechanism are used in both configurations, and conversion is accomplished simply by reversing certain ones of these components.

Abstract: A workholder for a machine tool or the like having a power assembly and a work gripping assembly that are separable to permit use of a plurality of work gripping assemblies and associated work gripping jaws of a size and shape to accommodate different workpieces. Work gripping assemblies with jaws pre-qualified to different workpieces can be exchanged quickly and automatically, as by use of a robot, when different parts are to be machined, while a single power assembly remains connected to the machine tool.

Abstract: A chuck has a chuck body rotatable about an axis, a plurality of jaws radially displaceable on the body and each having a radially inwardly directed workpiece-engaging face, and an axially displaceable operator linked to the jaws to radially displace same relative to the chuck body. Respective transducers on the chuck body are connected to the jaws for generating a signal proportional to a parameter of the respective jaw. These signals are transmitted from the chuck body to a stationary signal receiver adjacent the chuck body wholly without physical contact with the signal transmitter. Similarly, a stationary energy transmitter adjacent the chuck body transmits energy and a receiver on the chuck body receives the transmitted energy wholly without physical contact with the energy transmitter and powers the signal transmitter therewith. The transducers can be position or force transducers, for instance constituted by strain gauges or linear potentiometers.

Abstract: To firmly retain a jaw of a lathe or like chuck against movement it is formed with a transverse passageway or hole through it about midway of its length, a U-block is inserted in it in an inverted position so its legs will bear on the chuck face and a bolt is threaded in jaw directly above the U-block so it will bear on the block and force it against the chuck face.

Abstract: A lathe chuck is disclosed which includes a plurality of gripping jaws actuated by jaw screws. The screws are rotatably mounted in openings extending radially from the central bore of the chuck. The screws include a central passageway having a spring-biased plunger therein which is adapted to be caused to project from the passageway, across the chuck bore, and into engagement with the passageway of a diametrically opposed jaw screws. With the two jaw screws thus interlocked, they may be rotated together by turning only one jaw screw, thereby moving the opposed, linked gripping jaws in unison an identical distance in one direction. The chuck also includes means for the microadjustment of each jaw position, means for interlocking the movements of selected jaws for simultaneous convergence, and means for immobilizing the gearing means and thereby those jaws then engaged; it provides for repetitive return of the coordinated jaws to a prior position, and automatic centering of round stock.

Abstract: A method and a clamping assembly for securing rock bit sections during welding. The assembly has a chuck jaw that is supported by metal rods, which give the assembly enough resiliency to conform to the shape of the rock bit and which keep the chuck jaw parallel to the base so that the point of engagement between the chuck jaw and the rock bit section remains constant.

Abstract: A chuck comprises a body (10) rotatable about an axis (11) and at least one jaw (12) movable in a radial direction to clamp a workpiece in the chuck. At least one operating lever (14) is mounted on the body (10) and the, or each, lever is operable to move a jaw (12) radially. The, or each, lever is also movable axially with respect to the chuck body (10), to disengage from the associated jaw (12), enabling the associated jaw (12) to be removed simply and quickly from the chuck body (10) by movement in the radial direction.

Abstract: A bar stock puller for advancing bar stock in a machine tool including a tool body having a shank engageable by a tool holder and a jaw support portion pivotally mounting a pair of jaw assemblies that define spaced, opposed jaws adjustably mounted to a pair of jaw holders. The replaceable jaws define V-shaped, confronting gripping surfaces for engaging the circumference of substantially round bar stock and are biased towards each other in a clamping direction by a spring biasing force applied to the jaw holders by a plunger and an adjustable spring located within the shank. The jaw holders also define recesses which together define a gauge receiving opening by which the bar puller can be preset for a particular bar stock size at a location remote from the machine tool.

Abstract: A centrifugal force compensation device in a wedge-type balanced rotary chuck having jaws comprises, for each jaw, a balance weight and means for doubling the centrifugal force acting on the balance weight and applying the doubled force to the back face of that jaw near the outer periphery thereof thereby to press forward the jaw and impart thereto a moment urging it to rotate inward toward the chuck axis, whereby the so-called jaw flotation phenomenon is countered and prevented and, simultaneously, the reduction in chuck gripping force due to centrifugal force is compensated for.

Abstract: Locking mechanism for the adjusting mechanism of a 4-jaw work holding rotary chuck of the kind having oppositely disposed pairs of jaws normally adjusted in position with equal and opposite movement but having provision for differential adjustment of one of each pair of oppositely disposed jaws relative to the other, the locking mechanism being constituted by a spring loaded driving member drivably connected to the adjusting mechanism and by a fixed element which the spring loaded driving member is capable of engaging non-rotatably, a turning moment applied to said spring loaded driving member in either direction being effective first to displace the latter from engagement with said fixed element and then to rotate the adjusting mechanism.

Abstract: A rotatable carrier for holding kinescope faceplates during processing includes a support plate having radially extending retention slots. Object retainers are arranged to slide in the slots and hold the object being processed. The retainers are biased outwardly away from the axis of rotation by biasing means. A tensioning band urges the retainers inwardly toward the axis of rotation so that centrifugal force acts against the tensioning bands rather than the springs.

Abstract: A power operated jaw chuck with clamping jaws which can each be operated by a chuck piston movable axially within a bore in a chuck body via a separate wedge-hook transmission comprising wedge surfaces inclined in the axial direction which are formed in the circumferential direction in pairs on the chuck piston and on a wedge hook. In order to obtain higher load-bearing capacity of the wedge hook transmission without increasing the required space, the wedge hook is formed with a T-shaped cross section having a continuous wedge surface for internal clamping on the radially inner base surface and having a web which simultaneously serves as a connecting member with the rear side of the clamping jaw. Ledge-shaped wedge pieces are formed on the chuck piston on both sides of the web.

Abstract: A hydrostatic testing apparatus for capping an open end of a pipe, tube or cylinder is disclosed.A seal is provided to facilitate a fluid-tight seal between the pipe and the body. The seal has relatively long lips which facilitate a sealing engagement upon dirty or rough pipe surfaces. The seal is pre-stressed by lugs to sealingly engage the pipe under low pressure conditions.Adaptors, a centralizer having replaceable cam pieces, and replaceable jaw tooth segments facilitate the testing of a variety of pipe sizes and shapes with a single apparatus. An air purge valve is provided, in cooperation with passageways, to facilitate the expungement of air and gas from the interior of the body and pipe.A jaw design is disclosed which permits the side of the jaw to evenly grip the pipe by providing a pivotal attachment between the jaw and translator that is parallel to the axis of the pipe.

Abstract: A lathe chuck has a chuck body rotatable about an axis and formed with a plurality of angularly spaced and radially extending inner guides and with a plurality of angularly spaced and radially extending outer guides. Each of the inner guides in turn has an axially forwardly directed and radially extending blocking surface and an axially forwardly opening recess at the respective blocking surface. Inner jaws parts are radially displaceable in the chuck body in the inner guides and outer jaw parts projecting axially from the chuck body are radially displaceable therein in the outer guides. An operating element engages the inner jaw parts and jointly radially displaces them between radially inner and radially outer positions.

Abstract: Workpiece stop structure is provided for workpieces to be supported from and rotated by adjustable jaw chucks and collets. The stop structure may be used to great advantage in that successive workpieces may be tooled or cut to the same length dimensions with a minimum of effort. Further, the stop structure includes several different forms, all of which may be readily adjusted to accommodate workpieces of different lengths and the disclosure further includes an insertion tool for facilitating proper insertion of an expandable plug portion within a supportive hollow cylindrical member.

Abstract: The invention relates to work holding and is concerned with the provision of a work holding device which is more efficient than known devices. According to the invention a work holding device comprises a device for gripping a workpiece, the device being provided with internal detection means for determining the value of a force between the device and the workpiece. The value of the force can be displayed for the benefit of a user of the device. It can also be used for control purposes.

Abstract: A lathe chuck has a chuck body rotatable about a chuck axis and formed with a plurality of angularly spaced and radially extending inner guides receiving respective inner jaw parts and with a plurality of angularly spaced and radially extending outer guides receiving respective outer jaw parts. The inner jaw parts can be synchronously radially moved to open and close the chuck. Respective coupling members are provided between the inner jaw parts and the respective outer jaw parts and are rotational about respective coupler axes extending radially of the chuck axis between coupling positions engaging both of the respective parts and coupling same together for joint radial displacement and angularly offset decoupling positions permitting relative radial displacement of the respective parts. Locking elements are operatively engageable between the inner jaw parts and the chuck parts for blocking radial displacement of the inner jaw parts except when the respective coupling members are in the coupling positions.

Abstract: A lathe chuck has a chuck body rotatable about a chuck axis and formed with a plurality of angularly spaced and radially extending inner guides receiving respective inner jaw parts and with a plurality of angularly spaced and radially extending outer guides receiving respective outer jaw parts. An operating element is engageable with the inner jaw parts for radially displacing same in the chuck body in the respective inner guides. Coupling members are axially displaceable in the inner jaw parts and are each displaceable between a coupling position engaging the respective outer jaw part and coupling same to the respective inner jaw parts for joint radial movement and a decoupling position for relative radial diaplacement of the respective jaw parts. Radially displaceable cams in each of the inner jaw parts engage the respective coupling members and are biased by respective springs into radial outer positions in which the respective coupling members are in the coupling position.

Abstract: A retainer device which is adapted to block temporarily in a predetermined relative position the hard-steel jaws of a chuck comprises a carrier ring on which there are slidably mounted and lockable in radial direction, a plurality of blocking slides, each slide carrying a double-hook element presenting two inwardly directed hook arms. Upon adaptation of the retainer device frontally against the chuck jaws, each double-hook element engages from both sides, with the said inwardly directed arms, the clamping head portion of a corresponding chuck jaw, thus blocking the jaws in the desired working condition at which their gripping surfaces can be ground true with respect to the workpiece that is to be supported therein.

Abstract: A multi-jaw chuck having a centrifugally-actuated attachment for counterbalancing the adverse effect of centrifugal force on the chuck jaws during high speed operation. The chuck attachment includes an annular, hollow housing coaxially mounted on the chuck body and a lever associated with each of the jaws of the chuck which is pivotally mounted in the housing for pivotable movement about an axis parallel to the chuck body axis. Each of the levers includes a first pivot arm, disposed on one side of the pivot axis, for engagement with the jaw associated therewith and a second pivot arm, disposed on the other side of the pivot axis. The second arm has an effective length and weight such that it moves outwardly from the axis of the chuck body as a result of the centrifugal force developed upon rotation of the chuck body and, in turn, urges the first arm into engagement with the jaw associated therewith.

Abstract: Method and apparatus for slitting rolled material. The material is mounted adjacent to a slitting means which is oscillated substantially tangential to the surface of the rolled material being slit to improve the slitting action. Radially adjustable clamping jaws engage the outer surface of the rolled material, the adjustment of which is controlled by endless chains. A radially expandable supporting shaft is included for engagement with the inner surface of the rolled material for securely mounting that material.

Abstract: A work holder adapted to minimize clamp distortion of a workpiece by providing a movable metallic collet encompassing the workpiece, and a plurality of front and rear jaws to grip the metallic collet with different pressure forces at the front and rear sections of the collet.

Abstract: A chuck wherein the jaws are mounted on the outer ends of rods slideably arranged in the chuck body to incline radially and axially inwardly from the front face of the chuck. The rods are slotted on their radially outer sides for engagement with an axially shiftable actuator. The actuator and the chuck body have an axially central passageway therethrough for directing coolant to the front face of the chuck or for accommodating a workpiece ejector rod.

Abstract: A workpiece holder for a vertical broaching machine for broaching annular workpieces is provided with at least two centering pieces for radial immobilization of the workpieces. The centering pieces are radially pressable against an annular surface of the workpiece by a common drive means. The centering pieces are displaced until they rest firmly against the radial surface of the workpiece, thus ensuring that diametrical tolerances of the workpiece are completely eliminated.

Abstract: Six clamping jaws are uniformly spaced in a housing. The jaws are arranged on guideways for reciprocation toward and away from the center of the housing. Adjacent jaws are interconnected by driving trains, forming three groups of symmetrically arranged pairs. All the jaws are associated with a single common drive, each driving train includes a slide block operatively connected to this drive and situated on the bisector of the angle made up by two adjacent guideways. The slide block carries a freely rotatable member likewise situated on the bisector of the angle and operatively connected with each jaw of the respective pair.

Abstract: An adjustable composite wrench adapted for use both as a box or socket wrench and as an Allen wrench. A plurality of work-engaging elements are individually mounted for translational movement along radial paths. Restraining means prevent rotational movement of the work-engaging elements relative to the path of movement. Gear means are operatively associated with each of said elements such that rotation of the gear means causes, in cooperation with the restraining means, translational movement of the element along its radial path. Drive means common to each of the individual gear means provide synchronous movement of the gear means and their associated work-engaging elements whereby such elements are brought into engagement with a work piece.

Abstract: The upper and lower parts of a split mould are merely superposed together, and an inclined peripheral surface of said upper mould is brought into engagement with claws of a chuck attached to a rotary shaft of forming or moulding machine.

Abstract: An elastomeric cover for a chuck having movable jaws. The cover effects isolation of the chuck from the ambient environment while permitting jaw movement.FIELD OF THE INVENTIONThis invention relates to a seal or cover and more particularly it relates to a cover for a machine chuck designed to isolate the chuck from the ambient environment.BACKGROUND OF THE INVENTIONIn grinding or polishing various stock and particularly glass lenses it is often times desirable to immerse the same in an abrasive fluid. To do so the lens is placed in a precision fixture or chuck and then both of them are immersed in the abrasive liquid. A grinding element is then likewise immersed in the abrasive bath and brought into contact with the glass to effect the shaping or polishing thereof. Yet as is apparent the chucks designed to hold and support the glass indeed, precision chucks generally, require the utmost tolerance to insure proper lens shaping or part forming if that be the case.

Abstract: A chuck or coupling for connecting a rotary shaft to variable diameter work ieces; the work piece can be a pulley, shaft, bar stock or other mechanism required to be gripped by a chuck. The chuck structure comprises radially movable jaws slidably mounted on a rotary base or chuck body, together with a counter-balance for each jaw. Each counterbalance is located on a diametrical line passing through the associated jaw, whereby the jaw and counterbalance are subjected to oppositely directed radial forces during high speed rotation of the chuck structure. Centrifugal force is utilized to increase the gripping force of each jaw on the work piece.

Abstract: A means for detecting the degree of opening of claws of an electrically driven chuck in which the jaws are driven by an electric motor, is disclosed which includes a first detecting station having a. cam plate secured to the shaft of the motor and a plurality of switch means adapted for detecting the revolutions of the cam plate, a second detecting station including another a second cam plate fixed to a main power shaft of a machine tool in which said chuck is incorporated and another plurality of switch means adapted for detecting the revolutions of the another second cam plate, and a present counter adapted for emitting a signal representing the actual opening degree upon comparing two input signals delivered from the respective detecting stations.

Abstract: A self-centering, radially reciprocating jaw chuck for machine tools and the like comprising a chuck body member, a plurality of master jaws secured to the body member, each of the master jaws having a pair of circumferentially spaced fixed portions rigidly secured to the body member and a radially reciprocable portion positioned circumferentially between the fixed portions. Resilient means integral with both the fixed portions and the radially reciprocable portion connect these portions, and a work gripping member is secured to each of the radially reciprocating portions. Axially reciprocable means is provided within the body member for radially reciprocating the radially reciprocable portions, and work gripping members attached thereto, whereby flexure of the resilient means provides a self-centering action of the work gripping members with respect to the longitudinal axis of the chuck and the work.