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: An adjustable cartridge to be mounted in a boring bar, the cartridge including an anvil rotatably affixed to said boring bar, said anvil including a pocket into which a lay-down indexable insert is affixed. The anvil is secured in an axially oriented slot which includes an arcuate seating face. Rotation of the anvil within the slot effects radial adjustment of the insert.

Abstract: A method and apparatus for securing a drum blank for machining includes inserting a cylindrical mandrel within a bore of a drum blank, introducing a liquid support material into a space between the outer diameter of the mandrel and the inner diameter of the drum blank, and solidifying the support material. Once the support material is solidified, the drum blank is securely held to the mandrel. Machining operations can be performed by mounting the assembly in a lathe. After machining is completed, the support material may be treated so that the mandrel can be removed from the drum blank. The mandrel may then be recycled.

Abstract: Disclosed is a structure of a turret head provided with turning tool mounting mechanisms and revolving tool mounting mechanisms on the turret, wherein a turning tool can be mounted on the revolving tool mounting mechanism rotatably mounted on the turret. The turning tool is mounted on the turret at a holder of the tool for positioning and at the same time is tightly affixed to the revolving tool mounting mechanism at the tapered portion of the tool.Also provided is an engaging and disengaging mechanism for engaging and disengaging a gear of a unit drive shaft relative to a gear of a revolving tool mounting mechanism in preparation for mounting a revolving tool different in direction.This feature enables a revolving tool different in direction to be driven.Another feature is a provision of a lock gear. Locking the lock gear allows the revolving tool mounting mechanism to be employed for turning tools. The revolving tool mounting mechanism can be used for revolving tools when the lock gear is unlocked.

Abstract: A work holding apparatus is a work holder for holding a work in a predetermined position in relation to a basic member. A base column is rotatably supported astride on two sets of base plates. Holding fixtures are removably mounted on each side of the base column, such that different types of works can be supported and clamped by the holding fixtures. An indexing-rotation driving device rotates the base column such that it may be applicable to various types of works, thereby facilitating the holding of many types of works and the replacement of supporters and clamps. Furthermore, the base plate for supporting the base column is divided into two sets to reduce the weight of the base plate moving parts, and a base plate synchronizing means is provided to insure synchronized operation of the two base plates.

Abstract: A mounting head for fitting a socket with an electronic component comprising a mounting tongue located between two jaws having at least one intake port for holding a component, a first lifting device for shifting the mounting torque between the two jaws in a first direction, a first supporting headpiece for the jaws which is movable in the first direction toward the socket until the jaws come to rest against the socket after which the tongue may be shifted in the direction of the socket, a centering plate extending transversely to the jaws retained on a first headpiece together with the jaws and tongue, the headpiece being comprised of the first lifting device, the first headpiece being supported by a second headpiece which is situated at the side of the centering plate, the second headpiece being comprised of a second lifting device for shifting the first headpiece transversely to the centering plate and transversely to the first direction.

Abstract: In one embodiment, the bodies of the mandrel and the drill have radially opposing portions thereof which are threadedly engaged about the axis of the drill. Through bores in the respective body portions make it possible to latch the drill to the mandrel for the drilling operation, using a pin that is inserted through the bores, and then when the drilling operation is completed, withdrawn from the bores to enable the core of work material to be ejected from the drill by advancing the mandrel on the threading while the drill is restrained against rotation. In other embodiments, the bodies of the mandrel and the drill have axially opposing portions thereof which are equipped with raised steps on the axially opposing faces thereof. The steps enable the drill to be latched to the mandrel for the drilling operation by engaging the faces of the body portions with one another so that the steps abut in one axial plane of the drill.

Abstract: Boiler tube repair apparatus includes elongated guide rail structure for securing to a boiler tube panel adjacent a desired cut region, and three tool assemblies for mounting on the guide rail structure. Each tool assembly includes carriage structure with guide structure for engaging the guide rail structure and support structure on which a tube machining tool is mounted and that defines a tool movement axis dedicated to and coordinated with that tool. Each machining tool includes a drive motor, a manual motor control, a drive shaft and a machining member such as a cutter disc or head.