Abstract: A chuck for tools comprises a main body in which an axial center hole and a plurality of slanting holes extending radially from the center hole are formed, a plurality of jaws each being slidably inserted in each slanting hole and formed, at its outer surface, with a male screw, a rotary member having a female screw in meshing engagement with the male screws and mounted in the main body so as to be permitted for only rotation, a first grip integrally connected to the main body, and a second grip securely connected to the rotary member to cooperate therewith.

Abstract: An adjustable top jaw is provided which is attachable to a master jaw which is in turn attached to a chuck of a lathe or similar machine. The top jaw comprises a base segment, top segment drive block and a lead screw. The base segment is mountable on the master jaw. A lead screw aperture extends entirely through the base segment. A drive block slot extends downward from the top of the base segment into the base segment a distance below the lead screw aperture. The drive block is located within the drive block slot and has a first aperture extending therethrough colinearly with the lead screw aperture. The lead screw is located within the lead screw aperture and drive block aperture. The top segment is attachable to the base segment and has a drive block channel for receiving a part of the drive block. The rotation of the lead screw causes the drive block to move forward or backward thus moving the top segment forward or backward in accordance with the movement of the drive block.

Abstract: A chuck includes a body mounted on the motor shaft of a machine. A plurality of jaws is mounted to slide in bores and converge forward. A sleeve surrounds the body and is mounted to pivot around the latter. The jaws have an outer threaded part which meshes with a nut surrounding the jaws and integral with the sleeve surrounding the body. A series of balls is interposed between the face of the nut which faces rearward and the body of the chuck. The balls abut a ring made of a hard material, and that ring in turn abuts a ring made of synthetic material which exhibits shock-absorbent characteristics and is locked against the body.

Abstract: A holding device on a turning machine for a workpiece, which is held by a chuck serving as a clamping device and being arranged at a receiving disk, is equipped with separate correcting elements disposed at the clamping device. The correcting elements may be controlled individually by electrical, pneumatic or hydraulic means. The correcting elements act on the clamping device in order to adjust the workpiece.It is thereby possible to adjust the clamping device itself in a defined manner, so that the clamped workpiece may be adjusted easily.

Abstract: A power chuck has a stationary housing, a chuck spindle rotatable in the housing about a chuck axis, a plurality of jaws carried on the chuck body movable radially toward and away from one another, an actuator shaft movable axially relative to the body, a jaw actuator connected between the actuator shaft and the jaws for displacing same radially outward on displacement of the element in one axial direction and for displacing the jaws radially inward on opposite axial displacement of the shaft, and a motion converter carried on the spindle.

Abstract: In a semiconductor fabricating apparatus having a wafer rotational processing device provided with a wafer chuck, a wafer centering mechanism comprising: a plurality of movable stops disposed with even angular spacing around the center of the chuck and being capable of being moved radially toward and away from that center thereby to clamp the periphery of a wafer conveyed onto the chuck and subsequently to release the same; a plurality of pairs of wafer position sensors disposed at spaced-apart positions in a single row along the path of advance of the wafer, the sensors of each pair being disposed on opposite sides of and equidistant from the chuck center, each sensor operating to detect whether or not a part of the wafer exists thereabove and to generate a corresponding output signal; and a stop moving mechanism for moving each of the movable stops in the manner stated.

Abstract: The present invention is a tool holder which permits lateral insertion and removal of a tool means into and from the holder thereby making it unnecessary to move the machine or work piece to provide excess clearance. The tool holder includes a main body having a shallow tool cavity formed in one end thereof for receiving the tool means. A locking element having a u-shaped collar is rotatably mounted to the main body for clamping the tool means within the tool cavity. The u-shaped collar defines a tool slot having a tool slot opening which extends from the side of the locking element. When the locking element is in an unlocked position, the tool slot opening aligns radially with the open side of the tool cavity to permit lateral insertion and removal of the tool means into and from the cavity. When the locking element is rotated to the locked position, tool slot opening is moved out of alignment with the open side of the cavity thereby preventing removal of the to tool means.

Abstract: A power chuck has a stationary housing, a chuck spindle rotatable in the housing about a chuck axis, a plurality of jaws carried on the chuck body movable radially toward and away from one another, an actuator shaft movable axially relative to the body, and a jaw actuator connected between the actuator shaft and the jaws for displacing same radially outward on displacement of the element in one axial direction and for displacing the jaws radially inward on opposite axial displacement of the shaft. The jaws, shaft, and jaw actuator are rotatable about the axis relative to the spindle.

Abstract: A collet and tool assembly for rotatable tools such as drills and taps in which the collet and tool each include mating:a) stops for limiting entrance of the tool into the holder;b) matching detents for producing an audible click when the tool is properly placed in the collet; andc) matching eccentric sections which provide positive torque transfer between the collet and the tool.

Abstract: An axially moveable portable tool, such as a drill, and a guide for the tool are disclosed. The guide has a base with a post and a handle attached to and extending from the base. The post and handle are positioned so that a projection of the time of force applied during use to the tool grip and to the handle, both fall substantially within the base footprint. The upper extremity of the post can be provided with attachments that form parallel guide means or with angular sections that form a external guide for standard size and shaped portable tools. The portable tools can be easily attached to the post to assume a specific angle with the base and can be easily removed from it for independent use.

Abstract: A device for producing drilled holes with an undercut in facing panels includes a drill bit with a drill head that produces an undercut, and a drilling table for supporting a facing panel in which the drilled holes with an undercut are to be produced and displaceable in a plane of the drilling table. A trunnion projecting from a rotatable base member and engaging a bearing secured to the drilling table is movable between a first position in which the trunnion axis coincides with the axis of rotation of the base member, and a second position in which the trunnion axis is eccentric to the axis of rotation of the base member to effect swiveling of the drilling plate when the rotatable base is driven rotatably.The device has a mechanism for moving the trunnion between the first and second positions including a lever pivotally mounted on the base member, the trunnion being mounted on the lever, and a piston-cylinder drive secured to the base member for pivoting the lever.

Abstract: A tool head for moving a tool to a workpiece and applying an axial force thereto includes a grooved tubular spindle mounted on a fixed shaft for relative axial and rotational movement. The spindle is rotated by a timing belt transmitting power from a driver timing pulley. The timing belt is fitted around the timing pulley and grooved spindle with a pair of 90.degree. twists in the loaded and unloaded sections between the two pulleys. As power is applied to the timing pulley, the belt migrates toward the end of the pulley and the spindle closest to the unloaded section of the belt; and when a resistant torque is applied to the spindle the timing belt migrates to a stable position with respect to both the timing pulley and the grooved spindle and transmits torque and an axial force to the spindle.

Abstract: A chamfering tool and method for use in the precision backchamfering of a rotating part. The chamfering tool has a cutting head portion selected to match the size of the surface to be chamfered. Behind the cutting head is a shank portion of reduced diameter which connects the cutting head portion to an enlarged portion which supports the chamfering tool in a fixed tool holder. If the part centerline is not aligned with the rotating collet centerline, the part center traces a circular orbit. The shank portion of reduced diameter enables the tool to flex so that the cutting head can follow the part centerline being guided by the part's inner diameter.

Abstract: The invention relates to a method and equipment designed to drill countersunk holes on surfaces of unknown positions in which a presser fitted to the tool support is placed against the surface to be drilled, and can move axially in relation to the tool; the presser is used as a limit switch to control tool return.

Abstract: A chuck for a machine tool is provided and includes a chuck body that is provided with a frusto-conical opening that has guide surfaces. A clamping head is adapted to be received in the opening of the chuck body, with the clamping head having an axially extending receiving opening for workpieces, cooperating with a drawing mechanism, and being provided with gripping jaws that have mating guide surfaces. The guide surfaces of the opening of the chuck body have a pressure connection with the mating guide surfaces of the gripping jaws. The clamping head is provided with radially oriented receiving opening for the gripping jaws, which are radially movable in the receiving openings. The gripping jaws each have a width that is less than an inner radius of the opening of the chuck body.

Abstract: A self-centering chuck includes a plurality of centering and clamping slides disposed for slide movement to or from a common center, drive slides are associated with the centering and clamping slides, the latter having parallel or slightly oblique orientation to the drive slides means so as to slidingly move at least essentially parallel to the slide movement of at least one of the centering and clamping slides, the centering slides and the drive slides have wedge surfaces; a plurality of shift pins extend transversely to the centering and clamping slides and to the drive slides and cooperate with the wedge surfaces to couple the drive slides to the centering and clamping slides to obtain movement to or from the center of all centering slides; the shift pins each movein one direction in relation to the respective centering and clamping slide when the drive slides moves in one direction, and the shift pins move in an opposite direction when the drive slides move in the respective opposite direction, the moveme

Abstract: A machine for taper threading the end of a bar such as reinforcing bar used in concrete construction utilizes a power operated vice to clamp and feed the bar end axially into a rotary head which contains chaser tooling holders which open uniformly on the bar end as the head rotates. The rotary head is axially stationary but contains an axially movable key or linear cam which engages a readily removable transversely extending control rod assembly in turn moving the chaser holders. Axial movement of the power vice and thus the bar end at a controlled axial speed with respect to the rotary speed of the head moves the key to cause the movement of the chaser holders. The chaser holders in addition to supporting the thread cutting chasers also support ahead of the chaser an indexable triangular insert to pre-cone the bar end.

Abstract: A drill chuck according to this invention has a chuck body centered on and normally rotatable about a chuck axis and formed centered on the axis with a plurality of angled guide passages each having an axially forwardly open front end and an axially rearwardly and radially outwardly open rear end, respective jaws displaceable in the guides, projecting from the front ends thereof, and formed with teeth exposed at the respective guide-passage rear ends, and an adjustment sleeve axially fixed on the body and rotatable thereon and formed with an internal screwthread meshing with the teeth of the jaws so that rotation of the sleeve in one direction advances the jaws and opposite rotation retracts them. A grip ring on the chuck body centered on the axis axially forward of the adjustment sleeve has an exposed outer surface provided with grip-enhancing formations. Formations on the body and on the grip ring axially and rotationally fix the grip ring on the chuck body.

Abstract: A centering and clamping device is provided which comprises a plurality of rod elements, a plurality of clamping slides and reversing and non-reversing transmission elements between the rod elements and clamping slides to convert motion of the rod elements into centering and clamping motion of the clamping slides. Each of the rod elements are in engagement with some of the other rod elements whereby movement of one rod element can transmit motion to at least one other rod element. Various arrangements of the rod elements, slides and transmission elements are disclosed to achieve centering and clamping.

Abstract: Disclosed are methods for applying durable markings to wearing surfaces, such as concrete factory floors, roadways, terrazzo or ceramic tile floors, or for imparting particular floor surface qualities, such as providing a non-skid surface. A diamond surface drill bit rotating at, for example, 2500 to 5000 rpm is employed to form dry recesses in the surface, which recess is immediately receptive to adhesive for attaching a pre-molded insert, or to an insert formed in situ, such as an insert of an acrylic polymer. The disclosed surface drill bit has a cutting end with two general types of diamond-impregnated cutting element segments attached. Attached around the periphery of the cutting end are peripheral gauge cutting element segments of arcuate configuration spaced from each other.