Abstract: A method and apparatus for in situ drilling of a precise hole in an erected structural element and inserting in such hole in pressed-fit relationship a cylindrical strain gauge. A guide block is provided having a precision hole corresponding to the diameter of the hole desired in the structural element. The guide block has unthreaded bolt holes for attachment of the guide block to the structural element and guides a reamer to produce a precise hole in the structural element. The guide block also has threaded holes for advancing a push plate against a force-transmitting bushing which is insertable through the precision hole in the guide block into abutting relationship with an end face of a cylindrical strain gauge to force the gage into press-fit relationship with the precise hole in the erected structural element.

Abstract: A thread cutting machine where the rate of advance of the thread cutting tool is controlled by means of a control system whereby the rotation of the tool and its rate of advance toward the workpiece are both used to control the position of the cutting tool.

Abstract: An annular hole cutter wherein each tooth is formed with a radially outer cutting edge and at least alternate teeth are formed with radially extending, circumferentially staggered inner and outer cutting edges. The bottom face of each tooth is formed with oppositely radially inclined inner and outer back-off faces which intersect in a downwardly extending crest which in turn intersects the radially outer cutting edge. The outer back-off faces of alternate teeth are vertically relieved relative to the outer back-off faces of the intermediate teeth and the inner back-off faces of the intermediate teeth are vertically relieved relative to the inner back-off faces of the alternate teeth a distance greater than the chip load at which the cutter is operated. In the preferred form, the radially inner portion only of the unrelieved inner back-off face is relieved to a greater extent than the relieved inner back-off faces.

Abstract: In an actuator, a carriage coupled to an item to be displaced with a translatory movement comprises a follower element which defines contact surfaces engaged against the flanks of the thread of a micrometric screw. The contact surfaces co-operate with the thread of the screw only over a small angular portion thereof. The follower element of the carriage is held on the thread of the screw by resilient thrust means acting on the carriage so as to urge it pivotally about an axis (X--X) which is parallel to its direction of translatory movement, being prevented from moving in all the other degrees of freedom. The actuator is especially adapted for use in translator devices in which the level of precision is of the order of a micrometer.

Abstract: A battery operated, portable hand controlled cartridge case trimmer which indexes on the entire length of the case and permits resizing based on the total explosive expansion of the cartridge. A special clamping means secures the cartridge case for trued engagement by a cutter assembly having a cutting edge for length, a cutting edge for inside chamfer and a cutting edge for outside chamfer.

Abstract: A single-lip solid drilling tool has a one-piece shank with an integral head having a radially or diametrically extending groove for a blade with an eccentric tip. The blade is held in its groove by several clamping screws so that it can be removed for sharpening or for replacement with a fresh blade. One or both lateral portions of the blade extend beyond the periphery of the head to guide the tool in actual use. The shank has an eccentric coolant hole whose discharge end is adjacent the blade and which is formed by providing a short cylindrical hard-metal blank with an eccentric axially parallel bore before the blank is stretched to reduce its diameter to a requisite value and to simultaneously reduce the diameter of the bore. The stretched blank is then machined to provide it with one or more chip evacuating flutes and, if necessary, with one or more grooves for discrete guide members which extend beyond the peripheral surface of the head.

Abstract: A drilling spindle having a pressure foot is disclosed for handling drilling tools having relatively large diameter shank regions and relatively small diameter drilling bit portions regions. The pressure foot assembly includes a shutter plate which contacts and clamps the workpiece during drilling operations. The shutter plate translates along an axis transverse to the rotor axis to align either a small aperture or a large aperture with the rotor axis. The small aperture is sized to receive the drilling tool region of the drill, and permits the drilling region to be extended therethrough while providing good clamping of the workpiece during drilling. The large aperture is sized to receive the shank region of the tool, and permits the tool to be inserted or withdrawn from the spindle during tool changing operations.

Abstract: An automatic indexing chuck comprises a dividing pivot separately and in succession, operated by a dividing shaft and a locking sleeve. The dividing shaft is slideably and sealingly accommodated in a cavity of the locking sleeve which has retention planes for the dividing pivot and is in turn sealingly accommodated in a mandrel body cavity defining two adjacent chambers; the dividing shaft and the locking sleeve defining independent pistons operated by a single hydraulic circuit with reversible inlet and outlet ports, the pistons moving in opposite directions to perform consecutively unlocking, rotation and locking of the dividing pivot.

Abstract: An exchange mechanism enables removable members such as a tool member to be secured to an irremovable machining center. The exchange mechanism comprises a cassette connectible to the tool member, and a plurality of locking members and associated actuator carried by the machining center. The actuator slides the locking members radially outwardly such that inclined faces on the locking members abut corresponding inclined faces on the cassette. The inclined faces are oriented such that a force is exerted on the cassette which has an axial component urging the cassette toward the machining center, and a radial component tending to center the cassette.

Abstract: Hydraulically actuated arbor for finish machining thin walled cylinder such as internal combustion cylinder liner without deflecting from initial free state out-of-round condition including flexible Teflon displacement shell and accurately adjustable means for displacement.

Abstract: A memory is built in a tool holder to which a working tool such as drill or the like is attached. Various tool information such as kind of tool, dimensions of tool, tool use time, and the like is written into the memory. The tool holder having the memory therein is coupled with an external unit by contactless coupling means which doesn't need any electrical coupling, thereby allowing the tool information to be written into or read out of the memory. The information is transmitted between the memory in the tool holder and the external unit by way of the optical or magnetical coupling. The memory built in the tool holder consists of a non-volatile memory such that the memory content is not erased even if the power supply is shut off.

Abstract: A quick-change mechanism is provided between a male member and a female member which has a socket with an axis. A flange is provided on each member, and in the flange of the female member an eccentric circular cam is pivotably mounted on one side of the socket. The cam may be pivoted through an arc between a locked and an unlocked condition in a single plane. The unlocked condition moves the cam laterally outwardly beyond the cam follower surface in the male member. As the cam is rotated towards the locked condition, the cam locking surface moves in a single plane laterally inwardly and establishes an axially inward force on the cam follower surface. The quick-change mechanism is small and compact and contained entirely within the flange of the female member. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: The coupling is constituted by a split sleeve (1) made of material having shape memory. The sleeve (1) is capable of occupying a first memorized shape state (I) in which electrical and mechanical interconnection is provided between electrical conductors (2, 3). In a second memorized shape state (II) the sleeve allows the conductors to be freely inserted or removed from the sleeve (1). The sleeve is capable of passing reversibly between said first and second states under the effects of temperature changes.

Abstract: In an apparatus for manufacturing a bidirectionally openable slide fastener, a guide unit is disposed between a pair of spaced first and second slider attachment units for holding taut an individual slide fastener length between the guide unit and a chain gripper even when the individual slide fastener length is severed from a slide fastener chain after the threading of a first slider on the first slider attachment unit but before the threading of a second slider on the second slider attachment unit. With this guide unit, the individual slide fastener length is tensioned properly, so that the second slider can be smoothly and reliably threaded over the slide fastener length.

Abstract: A tool comprises clamping members spaced from each other on a plate that clampingly engage a coaxial cable. Drill guide members hingedly connected together are latchably secured together onto the plate and they include opposing holes centrally disposed relative to the clamped cable to enable a drill bit to pass therethrough to drill opposed openings through the jacket and shielding and into the dielectric sheathing around the center conductor, whereafter the drill bit and drill guide members are removed. A housing of the coaxial connector containing stationary and movable signal probes is mounted on the plate to position the signal probes relative to the drilled holes whereafter the signal probes are moved into electrical connection with the center conductor and ground conductor members penetrate the jacket and electrically connect with the shielding.

Abstract: A double-use electric drill including a frame and an electric hand drill that is secured thereto in either a first or a second orientation. In the first orientation, the frame is utilized as a hip or shoulder stock assembly when the drill is being used as a hand drill. In the second orientation, the frame is utilized as a drill press frame when the drill is being used as a drill press. The frame includes a column having a key portion formed thereon. The drill body includes a first keyway which receives the key portion of the column in the first orientation. The drill body further includes an opening including a second keyway. In the second orientation, the column is received in the opening with the key portion in the second keyway.

Abstract: An electrical connector capable of withstanding a predetermined pressure differential without leakage and a predetermined axial load without dislocation of insert assemblies from their normal position in the connector shell is disclosed. The connector includes one insert assembly which may be a pin or socket insert assembly and an other insert assembly which is a socket insert assembly. The one and the other insert assemblies include contacts arranged in "piggy-back" relation. The one insert assembly is ring staked to the connector shell and the socket insert assembly is bonded to a grommet and sealed in the shell.

Abstract: An electrical grounding connector for a helicopter rotor hub (15) comprises a bushing (25) which receives a hollow spindle (30) therewithin. Spindle (30) accommodates a cable or wire harness (35) therewithin and is rotatable within the bushing to accommodate twisting of the harness due to displacement of the helicopter blades. An electrical connection to hub (15) is made via flexible conductor (75), the spindle, and flexible conductor (60).

Abstract: A miniaturized surface mountable connector arrangement for connecting printed circuits on a printed circuit board to another circuit member, such as flat flex cable is provided. Each circuit on the circuit board is provided with at least two spaced apart solder-bearing contact pads. A connector housing having a board engaging surface includes a plurality of stamped metal terminals each having a pair of depending solder contact projections at least one of which depends from board engaging surface. The connector is positioned on the circuit board so that the contact projections engage the contact pads. Upon reflow of the solder material a balanced shock resistant mechanical attachment and electrical connection of the connector to the circuit board is provided. No additional mounting structures are required so the arrangement occupies less board surface area. The arrangement is well suited for robotic assembly operations.

Abstract: A method of cutting out components from aluminum sheets utilizes a routing tool. The sheet is held firmly in position by vacuum on a vacuum table during the cutting operation with the aid of a film of for example plastics material adhered to the back of the sheet, the routing tool being arranged to cut through the sheet but only partially to penetrate the film.