Abstract: A multiple segmented chuck jaw, operable for holding a workpiece while a work operation is being performed thereon, consisting of a first portion comprising a master and a second portion comprising an insert shaped to meet the requirements of a given application. The master and the shaped insert are each provided with cooperating dovetail means operable for detachably securing the master and the shaped insert together. The master is further provided with slot means operable to permit flexing of the master to increase the gripping force applied to the shaped insert, when the latter is secured in mounted relation to the master. Other inserts shaped to meet differing application requirements are also capable of being employed with the master without necessitating a modification in the construction of the latter. As a result of the multiple segmented construction of the chuck jaw, the master and the shaped insert are each capable of being hardened independently to increase the durability thereof.

Abstract: A power-operated chuck with gripping jaws guided radially in a chuck body, each of the jaws being driven by a spur toothing from a drive jaw which is movable radially inside the chuck body. The drive jaws are driven by a chuck piston which is axially movable in the chuck body and operates all the drive jaws in common. Independently of the corresponding gripping jaw, each drive jaw is guided in the radial direction and guided non-displaceably in the tangential direction and fixed in position in the axial direction directly in the chuck body. As a result there occurs an indirect securing of the positive connection between the clamping jaws and driving jaws, which positive connection is directly provided by the spur toothing. The chuck piston which is guided directly in the chuck body can be moved beyond the working stroke into a position in which it is out of engagement with the drive jaws.

Abstract: A self-centering lathe chuck assembly for positioning and holding universal joints and associated propeller shafts comprises a pair of jaw assemblies mounted for radial movement toward and away from one another and each having a concave, conically shaped member for receiving and holding a universal joint journal cross, whereby different sizes and types of universal joints can be held in a given pair of jaw assemblies and the center or axis of the journal cross is automatically aligned with the turning axis of the lathe, thus eliminating the need for a different kit or jaw assembly for each different universal joint.

Abstract: An adjustable clamping jaw assembly for a lathe chuck. The jaw is adjustable by assuming any one of several discrete positions relative to an elongated jaw base upon which it is mounted. Such adjustment is carried out by a keyway in the elongated jaw base, or key, and a rotatable tumble block having a plurality of keyways.

Abstract: A device for radially tensioning the jaws of a chuck to permit the jaws to be accurately machined. The device comprises a flat ring coaxially mounted onto the chuck and having a cam slot formed therein for each of the jaws of the chuck. A cam follower is associated with each of the jaws and comprises a first portion fixed to its associated jaw and a second portion slidably received in the cam slot in the ring which is associated with the jaw whereby rotation of the ring radially tensions the jaws via the cam followers.

Abstract: In a chuck with a plurality of two-part jaws each jaw has a radial clamping means bearing on mating formations consisting of a dovetail-shaped bar and groove which permit removal of a workpiece-engaging part in a transverse (i.e. tangential) direction.

Abstract: A chuck for lathes and other machine tools has a chuck body provided with axially shiftable wedging members to actuate the jaws, a rotatable guard ring prevents full axial withdrawal of these members from sockets in the jaws in one angular position of the ring. In another angular position of the ring recesses in the latter are aligned with the wedging members to allow the latter to clear the jaws for radial withdrawal and replacement thereof.

Abstract: A method of making a tapered wedge for use in gripping a multi-ply rope or cable, especially concrete-reinforcing tendons, wherein the tapered wedge is circumferentially divided into a plurality of parts surrounding an axial aperture for the rope or cable. Each of these parts is deformed, for at least a part of its axial length, by pressing only its circumferential side edges inwardly toward the axis of the aperture so as to displace its interior surface adjacent these edges inwardly as well as to displace exterior surface regions inwardly.

Abstract: A longitudinally sectioned collet pad having plural pad segments of the detachable type, such as are conventionally used in an expansible collet, is provided with a freely interchangeable liner for each pad segment. Fastening means secure each liner against the inner surface of an outer member of the pad segment, and hold the liner against movement, either circumferentially, or radially inwardly.Liners for each pad segment are provided with a roughened inner surface, preferably with serrations, to grip a bar of stock by coaction of the pad segments. Interchangeability of liners obviates the need for integral pad segments, permits the use of liners for a wide range of stock diameters using the same outer members of the pad segments, and effects great economy in the manufacture and use of removable collet pads.

Abstract: Provides an annular frame for attachment to the outer end of a circle of soft jaws carried by a radially adjustable chuck of a rotary machining assembly, whereby in spite of looseness or misalignment of the chuck jaws, their soft jaws can then be shaped to hold a subsequent workpiece in absolute alignment with the spindle. Frame has number of movable attachment arms corresponding to the number of jaws, which arms are adjustable along respective radial or arcuate guideways so as to engage the circle of soft jaws when opened to different circumferences. When each arm has two adjustable frame-attachment points, annulus is thereby self-centering. For use with (radially slidable) arms having single frame-attachment point, auxilliary centering device is provided.

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 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.