Abstract: A hybrid holding device used in a milling machine, comprising a base with mounting structures for detachably fastening the hybrid holding device securely onto a workbench of the milling machine in a fixed stationary position. The hybrid holding device further includes moveable multi-jaw assembly that includes at least three jaws that directly receive and securely hold a workpiece without an adapter.

Abstract: A circular saw mounting device which rotatably supports a saw blade in a grinding machine is disclosed. The mounting device comprises a base plate adapted for mounting in a grinding machine; a centering element comprising at least two engagement elements configured to be operated in a radial direction between a mounting position and a locking position. According to the invention the mounting device further comprises an actuator comprising a pin being configured to be operated in an axial direction and arranged to engage with pivot articulated couplings to each of the engagement elements to thereby transfer a radial displacement to the at least two engagement elements and to thereby operate the at least two engagement elements between the mounting position and the locking position.

Abstract: Disclosed is the shape of a curvature of two or more pathways for a device having moving parts that cause movement of an object along those pathways, such that the device can locate or hold the object. In the embodiment, an apparatus is described that centers and optionally locks an object at a desired location. The applications for such a device are varied and can range from chucking a workpiece of varying diameters in a lathe, to centering a drone on a landing zone, to medical and scientific devices to capture and center objects to study, to moving atomic level objects using an electromagnetic field. The scope of this disclosure is the mathematics that defines the mirrored curvatures of each curved pathway and the positioning of the curvatures relative to each other, and the relative movement of the mirrored curvatures to cause the desired effect.

Abstract: A power chuck includes a housing in which there is arranged a drive unit having a traction guide means moveable in the direction of a clamping axis. There are arranged two pairs of mutually diametrically opposite base jaws. The base jaws are guided radially, in the housing substantially perpendicularly to the clamping axis, and the drive unit is adapted to convert the movement of the traction guide means into the movement of the base jaws. According to the invention, it is proposed that the drive unit for each base jaw has a slider which is in engagement with the base jaw and which is moveable with a movement component on a circular path about the clamping axis.

Abstract: A chuck for clamping workpieces or tools in a clamping space with a clamping force (F). The chuck includes at least two chuck jaws movable in translation along one clamping plane (E) in the direction of one center Z of the clamping space and a gear train located at least largely within the chuck for transfer of a driving torque of a drive motor, which can be coupled to the gear train by coupling means of the gear train, to the chuck jaws for movement of the chuck jaws. The coupling means able to be coupled to a corresponding coupling connection of the drive motor. The movement from the maximum size of the clamping space to the minimum size of the clamping space is executed via the gear train from the drive motor.

Abstract: A ram with a multi-axis, multi-directional “self-centering shell holder” having predetermined spacing with respect to its engagement with the shell holder so that the shell holder supporting the cartridge case has the ability to deviate from the ram centerline in any direction to re-align with a centerline of the die bore is provided. The present invention also provides a retaining clip with push down tab allowing for quick insertion and removal of the self-aligning shell holder from the ram top.

Abstract: A chuck for clamping workpieces or tools in a clamping space with a clamping force (F). The chuck includes at least two chuck jaws movable in translation along one clamping plane (E) in the direction of one center Z of the clamping space and a gear train located at least largely within the chuck for transfer of a driving torque of a drive motor, which can be coupled to the gear train by coupling means of the gear train, to the chuck jaws for movement of the chuck jaws. The coupling means able to be coupled to a corresponding coupling connection of the drive motor. The movement from the maximum size of the clamping space to the minimum size of the clamping space is executed via the gear train from the drive motor.

Abstract: An adjustable tool holding surface grinder fixture securing a collet holder for holding one of a plurality of metal cutting tools, such a drill bit, on a base which slides directly adjacent a surface grinder. A rotatable fixture mount, disposed on a vertical wall at a right angle on the base, is adjustable at various pre-set angles via the alignment of positioning holes on the fixture mount and adjustment holes on the vertical wall to secure the collet holder for sharpening the cutting tool at varying angles relative the surface grinder. Several clamping screws are provided to secure the collet holder on the base.

Abstract: A compression tool is configured to compress one or more components of a delivery device, such as a closure element and one or more flanges of a pusher tube. The compression tool includes clamping means configured to close or release with rotation of actuating means (e.g., rotating means). In a closed position, the clamping means can sufficiently compress the one or more components of the delivery device so that a technician can easily position a garage tube about the compressed delivery device components. The assembled delivery device (or assembled garage tube) can then be removed from the compression tool upon reverse rotation of the actuating means, and subsequent opening of the clamping means.

Abstract: A drill guide for guiding elements, especially drill bits and implants of an implantation kit during a surgical intervention, has a main body having a gripping portion. The drill guide has an upper and a lower central opening along its longitudinal axis with a through going cavity for receiving the element to be guided. A lower contact surface is positioned on an object, such as a bone, on or into which the element is to be guided. The diameter of the through going cavity can be varied by a.) radial positioning of three or four jaws inside the cavity through a groove-slide block system and/or b.) against the force of a spring at the lower free end of guiding extensions. The spring is provided on the back side of the extensions which bear against the inner wall of the drill guide sleeve.

Abstract: To provide a practical chuck device which is not only capable of providing more reliable and stable retention between the rotary body or the main body and the rotary sleeve, but also has excellent mass-productivity.

Abstract: The present is a hole saw tube notcher with a rotary vice that aligns a tubular workpiece and a hole saw aligning assembly with a rotatable arm that aligns a hole saw to form a single or multiple cut notch geometry with a set radial middle that remains fixed when the rotary arm is rotated and when different diameter workpieces and hole saws are secured to the notcher.

Abstract: A device for holding an essentially cylindrical work piece (22), in particular a jewelry ring, for machining with a laser beam (L) has at least one chuck (20) that is supported so that it is able to rotate around a rotation axis (18) and that is provided for centrally holding the work piece (22) by means of first clamping elements (30), which automatically fix the work piece (22) in position through the exertion of a spring force.

Abstract: An auto hammer having housing, a handle and a striking device, the striking device including a striking rod for striking nails or other components in a linear reciprocating manner and a clamping mechanism for clamping nails or other components. The clamping mechanism includes clamping elements and a sleeve and the sleeve is provided with slots along which the driving portions of the clamping elements may slide so that the clamping elements are movable between a closed position and an opened position. This clamping mechanism can reliably clamp nails or other components to facilitate the operation of the user.

Abstract: An adjusting magnetism shelter of a cutter holder has a stationary collar, a sliding assembly and a cap. The stationary collar has a disk and multiple sliding recesses. A first hole is defined in the disk. The sliding recesses are defined in the disk. The sliding assembly has multiple sliding bars. Each sliding bar is mounted in a sliding recess and has a magnetism bar and a moving shaft. The magnetism bar has a reflection surface. The moving shaft protrudes from each sliding bar. The cap covers the stationary collar and has a top board. The top board has multiple arc grooves. Each arc groove has an inner end and an outer end. The inner end of the arc groove is near the first hole. The outer end of the arc groove is far away from the first hole and is inserted into one of the moving shafts.

Abstract: A pair of gripping sections performs opening and closing operations along a base member through displacement of a piston by means of a pressure fluid supplied to a chuck body. A pair of fingers, which constitute the gripping sections, is openable and closable in directions perpendicular to opening/closing directions of the gripping sections, by means of a driving force supplied from a driving section. The gripping sections are positioned with respect to a workpiece by actuating the pair of fingers to perform the opening/closing operation. Thereafter, by supplying the pressure fluid, the workpiece is gripped at a desired gripping position by means of the gripping sections.

Abstract: A work fixing device capable of stably fixing the work, without any biasing, in the longitudinal direction of the work, of the fastening force for fixing the work. The moving mechanism of clamps is constructed by comprising a scroll disc as working disc forming a circular hole in which to insert the work at the center and scroll guides in spiral shape the winding direction of which is opposite to each other from the center toward the outer circumference on the both side faces, a rotary drive mechanism for rotatably driving this scroll disc, and scroll pieces having a fitting portion to be engaged with the scroll guides of the scroll disc and disposed on both sides of the scroll disc in a way to correspond to a plurality of clamps respectively.

Abstract: The invention relates to a clamping drill chuck comprising a chuck body (1), a clamping cone (2) that can be rotated coaxially in relation to the chuck body (1) and is axially supported on a jaw holder (3) which is mounted on the chuck body (1) and in which clamping jaws (4) are guided in guiding slits, said clamping jaws being adjustable, by means of the jaw holder (3), for the clamping and releasing action by a relative rotation between the chuck body (1) and the clamping cone (2). Said drill chuck also comprises a locking device (9) provided with a toothed ring (6) which is coaxial to the chuck axle (5), in addition to a latch mechanism (8) which is mounted on the jaw holder (3) and engages in the toothed ring (6) when subjected to the force of a spring (7).

Abstract: A work head for a machine for shaping objects. The work head has pincher elements actuated by an operating member which is, mounted to slide coaxially inside the body of the work head, and which is hollow to allow the passage of a tube or object that is to be shaped. The pincher elements may be made of a single piece consisting of a pincher arm and an operating arm.

Abstract: The present invention is directed to a chucking system. The body of the chucking system preferably houses cam plates which may be driven manually by an independent worm shaft, or hydraulically by a piston/gear rack in lieu of a worm shaft. A face plate preferably houses four master jaws. The jaws may be engaged to the cam plates by pins. The jaws may be moved inward and outward preferably by rotation of the cam plates due to the ascending/descending slope of the slots in the cam plates. Each set of two jaws may be driven independently of the other because of the two separate cam plate mechanisms. The top cam plate is preferably held concentrically to the bottom cam plate by a needle bearing. The entire cam plate may “sandwich” pivot on a center tube which may be anchored in the base of the body and the top face plate.

Abstract: The present invention relates to an electrically driven chuck for holding a chuck of a machine tool, wherein an electrically driven chuck which has no need of any driving means to be exclusively used for a holding chuck, very simplified, and freely adjustable.Chuck fixing means 40 is locking means for locking a chuck body on a headstock 1. Position-deciding pin driving means 42 includes position-deciding part 43 which has piston 44. The insertion of position-deciding part 43 is inserted into position-deciding hole 41 when pressured air is supplied within cylinder 46. When built-in motor 4 is rotatively driven, both main spindle 2 and scroll 17 are rotatively driven, and jaws 30 move to hold or un-hold a work in the radial direction.

Abstract: A power chuck system is disclosed featuring a motor, a harmonic drive and a chuck. The harmonic drive is arranged with an input member driven by direct connection with the motor rotor, and an output member directly connected to a long stroke jaw actuation device, providing an integral unit which rotates together with the spindle during machining. During jaw adjustment, an electromagnetic brake releasably connects the motor stator with the spindle and chuck body. Gripping force adjustment is achieved by adjusting the motor torque. The inertial forces of the rotating components are overcome by controlling the motor torque and velocity as gripping ensues, and therefore both high and low gripping forces may be accurately achieved with high speed jaw adjustment. Jaw position and workpiece diameter measurement with a feedback capability are made by use of a rotary encoder.

Abstract: An adjustable socket has a number of selectable socket size openings available. It includes a drive member, an indexing collar positioned within the drive member, and an axially moveable drive core positioned within the drive member that is manually rotatable to different positions corresponding to the selected socket size openings. There are a series of teeth on the drive core and the drive core has a cam surface with guide elements. Jaw members mounted to the drive member to move laterally between fixed lateral positions upon rotation of the drive core, each fixed lateral position corresponding to a selected socket size opening.

Abstract: An apparatus for grinding a shank of a drill bit includes a base and several movable jaws supported by the base, that are movable toward each other and away from each other. A support ring is rotatably secured to the base, which has a central opening that encircles the movable jaws. A laterally adjustable grinding wheel support is secured to the support ring. Incremental rotation of the support ring results in incremental orbital movement of the grinding wheel support relative to the movable jaws. Lateral adjustment of the grinding wheel support moves the grinding wheel support toward and away from the movable jaws.

Abstract: A workpiece spindle device for a machine tool having a drivable workpiece spindle in a spindle housing and including a hydraulic oil supply device with a non-rotating housing portion connected to the spindle housing. An oil control device is connected to the non-rotating housing and communicated to the oil supply device without an oil line therebetween. An oil flow path is provided between the oil control device and a cylinder chamber of a workpiece clamping cylinder of the spindle with the oil path being free of any valve and thus substantially unrestricted to oil flow.

Abstract: A size adjustable wrench socket is disclosed which has a plurality of jaws which are slidably engaged within a jaw guide for moving radially inward and outward relative to the jaw guide for fitting threaded fasteners of various sizes. A controller sleeve is configured for engaging upwardly extending protuberances of the jaws, such that rotation of the controller sleeve in various directions will moved the jaws inward and outward relative to the jaw guide. The jaws further include a plurality of upwardly extending teeth which are formed into planar shoulders of intermediate portions of the jaws. A latch member is provided having a planar surface from which a plurality of teeth downwardly extend for engaging the upwardly extending teeth of the planar shoulders of the intermediate portions of the jaws. The latch member is movable from a latched position to a released position.

Abstract: A machine chuck (10) having a base (13) to be rotated about a longitudinal axis. Jaw members (20) move relative to the base (13) and radially with respect to the axis. A scroll member (18) is mounted on the base for angular movement relative thereto, which scroll member (18) engages the jaws (20) to cause the radial movement thereof. The base (13) has an annular passage which receives pistons (17) attached to the scroll member 18. Fluid under pressure delivered to the passage (16) causes angular movement of the pistons (17) and therefore scroll member (18) relative to the base (13). This angular movement causes radial movement of the jaw members (20).

Abstract: An adjustable socket includes a drive member, a plurality of jaw members supported by the drive member and selectively movable between fixed lateral positions, each fixed lateral position corresponding to a selected socket size, and a drive coupling operatively coupled to the drive member and manually movable to different positions corresponding to the selected socket size openings. The drive coupling has a substantially flat cam surface with spirally configured guide elements thereon that engage cam followers on the jaw members to move the jaw members laterally. There are a plurality indexing slots in the drive member and an indexing and locking element that selectively engages and locks into an indexing slot upon a socket size openings being selected. The number of indexing slots correspond to the number of selectable socket size openings available. There are visible indicia associated with each selectable position to indicate the selected socket size openings.

Abstract: An apparatus is disclosed which has utility for assembling a flexible tubular segment telescopically upon an end portion of a length of tubing when the tubing has an outer diameter which is substantially the same or greater than the inner diameter of the tubular segment. The apparatus has the capacity to controllably stretch the flexible tubular segment sufficiently to facilitate passage therethrough of an end portion of a length of the tubing. The end portion of the length of tubing is then positioned inside the stretched flexible tubular segment such that the stretched tubular segment is located a pre-selected distance from the free end of the end portion of the length of tubing. The tubular segment is then allowed to contract around the the end portion. The assembled tubular segment and end portion of the length of tubing are then ejected from the apparatus while maintaining the pre-selected distance of the tubular segment from the free end of the end portion of the length of tubing.

Abstract: An improved scroll chuck for holding a workpiece in a lathe including a jaw holder having a front side and a rear side, radially extending slots in the front side and means for attaching the holder to the lathe for turning about a central axis. Two or more jaw devices are mounted in the slots and are radially movable therein. A scroll member is rotatably mounted on the holder and has a spiral-shaped rib formed on a front surface thereof. This rib extends along recesses formed on the jaw devices whereby rotation of the scroll member causes the jaw devices to move in the radial direction. A pin member is arranged on one of the jaw devices and extends from a rearwardly facing surface of the device and into an elongate recess formed in the holder. This pin member prevents the jaw device from accidentally disengaging from the holder.

Abstract: An hydraulically operated slip assembly useful to grip pipe being run into or pulled from a well. This assembly has upper and lower plates, each having a passage for pipe. Wedges, carrying unique slip systems are positioned around the passages between the plates and are slidably mounted for guided radial movement inwardly to initially grip pipe in neutral position and outwardly to ungrip pipe as moved by an hydraulic cylinder pivotally mounted aside on the lower plate. The unique slip systems automatically increase gripping force on initially gripped pipe on more than about 0.7 inches up or down movement from neutral position caused by loads on the pipe. Forces resulting from increased pipe gripping force on pipe develop frictional forces within the slip assembly, which effectively prevent outward movement of the wedges after inadvertent or on purpose operation of the cylinder to ungrip the pipe.

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: The chuck includes a structure supporting a table provided with first sliding seats and with second sliding seats which extend radially from the center of the table and respectively accommodate means for centering the workpiece and means for locking the workpiece; the centering means are controllably movable towards or away from the center of the table, while the locking means are controllably movable from a first position spaced from the workpiece to a second position proximate to the workpiece and are also controllably movable in a direction substantially perpendicular to the face of the table directed towards the workpiece from a release position, in which the locking means are disengaged with the workpiece, to an engagement position, in which the locking means are engaged from the workpiece. The chuck also includes control means which act on the centering means and on the locking means; means are furthermore provided for the connection of the control means to the locking means in the second position.

Abstract: A tool clamping device is provided for quickly and securely clamping rotary tooling adaptors to tool clamp blocks. The device is adaptable to semi-automatic or robotic tool switching operations and minimizes machine downtime.

Abstract: This invention provides a chuck for a glassworking lathe which includes a chuck body rotatable with a drive spindle nose about a longitudinal axis and a handwheel rotatable about the same longitudinal axis. A locking device is provided for releasably locking the handwheel to the chuck body for unitary rotation of the handwheel with the chuck body. A spiral gear or scroll is fixed to the handwheel to define a radially extending path of spiral movement relative to a longitudinal axis upon rotation of the spiral gear. A plurality of jaw base members include spiral gear grooves for meshingly engaging the spiral gear, are angularly spaced about the axis and are movable radially with respect to the axis upon rotation of the spiral gear engaging the gear grooves formed in the bottom of each of the jaw base members.

Abstract: A center chuck assembly for rotatably supporting the end of a cylindrical workpiece comprises a shaft rotatable in a mounting pipe to be mounted on a receiving member and having an operating flange and a disc formed on the outer end thereof. The disc has a spiral groove on the end surface thereof. A chuck holding member having chuck members slidably fitted within holes formed radially in the chuck holding member, is rotatably fitted on the disc of the rotating shaft. The chuck members have teeth on one side thereof, and these teeth engage with the spiral groove on end surface of the disc. By rotating the operation flange relative to the chuck holding member, the chuck members are caused to project outwardly by means of engagement of said teeth and spiral groove and to abut the inside surface of the workpiece at a position spaced from the end of the workpiece, thereby supporting the workpiece securely. By using this center chuck assembly, end surface of the workpiece can be machined easily in one process.

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 has a chuck body centered on a chuck axis and having an axially forwardly opening and axially centered recess and an adjustment ring rotatable but not axially displaceable on the chuck body, having a central hole aligned with the recess, and formed with a plurality of guide passages open radially inwardly into the hole. The body and ring normally are carried on a drill spindle with the shank of a drill bit through the recess and hole and the spindle, shank, and chuck axes all coaxial. Respective jaws radially displaceable in the passages have inner ends engageable with the drill-bit shank in the recess. The chuck body has a face directly axially confronting the jaws and formed with an axially projecting spiral ridge. The jaws have axially projecting teeth complementary to and engaging with the ridge. Thus relative rotation of the body and ring about the axis radially displaces the jaws in the ring.

Abstract: Method and apparatus for centrally mounting one circular plate relative to another circular plate. The use of such method and apparatus in conjunction with a device for centering and holding a piece of pottery in a central position relative a potter's wheel axis is described.

Abstract: A hydraulically operated slip assembly, connectible to a well head or well pipe handling machine and useful to intermittently grip pipe being run into or pulled from the well. The slip assembly has upper and lower plates with passages for pipe. Wedges, carrying unique slip systems, are positioned around the passages and slidably mounted for radial movement between guide plates extending from the upper and lower plates. The wedges are moved radially inward to grip pipe and radially outward to release pipe by a hydraulic cylinder, pivotally mounted aside the lower plate. When actuated to extend, the hydraulic cylinder rotates an inner bearing race and attached camming segments, which move the wedges inwardly to grip pipe. When the cylinder is actuated to contract, the bearing race and camming segments are rotated to pull the wedges outward radially, releasing pipe. The bearing outer race is housed in ring segments between and connecting the slip assembly upper and lower plates.

Abstract: A chuck for use in lathes and on other work equipment has a jaw carrier that is mounted in a central bore of a chuck housing on a pair of pivot pins and is capable of being indexed or rotated 180.degree. within the chuck housing while a workpiece is held in chuck jaws supported on the jaw housing. The indexing permits performing operations on the opposite ends of the workpiece without unchucking the workpiece from the jaws that are carried on the jaw carrier. The construction of the chuck permits obtaining adequate jaw gripping force and a positive drive between the chuck housing of the workpiece and the indexing jaw carrier. The chuck greatly increases the versatility of machine tools and yet is easily constructed with existing tools itself because it doesn't involve complex interfitting parts.

Abstract: A wire canister capable of being used by robots during the assembly of a wire harness. The wire canister is capable of accepting, storing and dispensing random lengths of wire, i.e., a wire segment. The leading and trailing ends of the wire segment are constrained in such a way that the ends of the wire segment may be readily acquired by the manipulator of a robot and presented to other supporting equipment for purposes of performing operations on the ends of the wire segment.

Abstract: A scroll chuck device comprising an annular body, a ring plate which is rotatably fitted in the annular body and which has scroll grooves, jaw holders on the ring plate which have clamping jaws and which are engaged in the corresponding scroll grooves so that the relative rotational movement between the ring plate and the jaw holders causes the latter to radially move, and clutch means between the annular body and the ring plate.

Abstract: In the embodiment shown, the chuck comprises a hub rotatably journalled in a jaw carrier, and the latter rotatably journalled in a body. The carrier pivotably mounts a plurality of jaws having camming surfaces, and drive pins upstanding from the hub and the body slidably engage the camming surfaces to move the jaws outwardly, to engage the inner surface of a workpiece, or inwardly, to engage the outer surface of the workpiece. A screw carried in the jaw carrier is movable into the hub, to lock the hub and jaw carrier together, and movable into the body, to lock the body and the jaw carrier together. In the prior circumstance, the drive pins of the body are operative to move the jaws inwardly or outwardly; in the latter circumstance, the pins of the hub are operative to move the jaws as noted above. The jaws have a first plurality of camming surfaces for operative engagement with the drive pins in the body, and a second plurality of camming surfaces for operative engagement with the drive pins in the hub.

Abstract: A filter assembly includes a housing for releasably locking to a base for enclosing a replaceable filter element. The base includes a support over which the housing is positioned. The support includes a plurality of radially extending guide pins. A plurality of radially movable jaws are mounted on the guide pins to releasably lock the housing to the base. A rotatable cam ring is coaxially mounted on the support and includes cam slots for receiving corresponding axially extending cam engaging portions of the jaws. The jaws move radially inwardly and outwardly to lock and unlock the housing from the base in response to rotation of the cam ring.

Abstract: A mechanical concentric support device for use on machine tools such as lathes, precision grinders and the like, for either internal or external engagement of the workpiece by radially extensible support shafts driven by a scroll mechanism. The key connection for the scroll mechanism is located on one of the circular faces of the device to permit close-fitting internal support of cylindric workpieces, and adapters are shown for both internal and external gripping of workpieces of a wide range of diameters both larger and smaller than the diameter of the support device.

Abstract: The centering and holding device of the invention is a relatively simple but practical piece of equipment for attachment to a potter's wheelhead for centering and holding the pot such as a vase, bowl, plate or the like on the said wheelhead. The top plate of the device is provided with sliding arms for engaging and holding the pot and the body portion of each arm extends through the top plate to project below for co-action with spiral grooves formed in the surface of the bottom plate. When the plates are rotated relatively to each other the arms move radially and to a like extent.

Abstract: A power-actuated chuck comprises a chuck body in which a plurality of chuck jaws are radially displaceable, each jaw having inclined teeth engageable by a substantially linearly displaceable wedge or camming element on the chuck body. A drive ring is connected to all of these wedge members for the joint displacement thereof and is, in turn, actuated by a tangentially displaceable slider which is shifted by an axially displaceable member connected to an axially effective piston-and-cylinder arrangement.

Abstract: The chuck is for use with turning machines, and includes a chuck body and radially displaceable jaws each movable by a key bar which is guided in the chuck body tangential to the axis of turning, with each key bar having a splined strip meshing with teeth on the associated jaw and being displaceable to an extent such that, for removing the associated jaw, the splined strip attains a position in which it is disengaged from the teeth of the associated jaw. The actuating mechanism comprises a control member, in the form of a cylindrical sleeve, concentrically guided in the chuck body and axially displaceable in the latter through a key bar operating range and into end positions beyond the operating range. The control member may be formed with wedge surfaces extending obliquely to the direction of displacement of the key bars and each key bar is formed with a corresponding mating surface.