Abstract: A kit for repairing a worn out of round aperture. The kit includes a template which is later utilized as a part of the repair. In a first embodiment, the template is precisely located by means of utilizing the bottom of the aperture which does not become out of round as does the upper portion thereof and is fixedly attached to the structure containing the out of round aperture. A sacrificial pin is inserted in the out of round aperture, centered therein by means of the bottom non-out of round portion and adhered thereto. A drill is then passed through the boring guide enlarging the out of round aperture to a true round bore and the sacrificial pin is drilled out at the same time. The boring guide is then removed and an enlarged precision pin is inserted into the re-bored aperture. The new pin is fixedly secured in the new aperture by any convenient means such as peening between the pin outer surface and the adjacent structure.

Abstract: A drill guide, for use in the preparation of a dental implant site, having a tubular body with a screw thread along at least a section thereof. The drill guide has a stent with screw threads that are complementary screw threads allow the removable attachment of the tubular body to the stent and allows the axial advancement of the tubular body toward the bone. The complementary screw threads are provided on a matrix material of the stent.

Abstract: A drilling template for carving into the lateral edge or the jamb of a door, a cavity shaped and dimensioned to receive either a flanged lock or its strikeplate has a series of drill bit bores at regular spaced-apart intervals along a central line, a pair of lateral legs with sharp ends, and mounting holes corresponding to those of the lock or strikeplate. The template is designed to be hammered into the door edge or jamb until the sharp edge-ended edges define the outline of the lock flange or of the strikeplate as well as the amount of wood to be removed to form the mortise necessary to nest those elements. The template can be screwed in place through mounting holes that correspond to those of the lock or strikeplate. A drill is used to rout the cavity through the drill bit bores. Guides in either side of the bores prevent lateral movement of the bit, but allow slight longitudinal swing to remove material that may remain between holes.

Abstract: A drill guide is disclosed including a sleeve mounted on a handle. The sleeve of the drill guide has a bore which is dimensioned for slidably receiving a bit sizing ferrule therein. The bit sizing ferrule has a sized bore for demountably inserting a drill bit or other instrument therein having a particular width.

Abstract: A device (10) for use in combination with a hole saw (12) of the type including a cylindrical hollow body (14) having a circular lower cutting edge (16), a top mandrel (18) with a shank (20) in engagement with a chuck (22) of a drill (24) and a pilot bit (26) for guiding the hole saw (12) when cutting a new opening in a workpiece (28) having a predrilled opening (30), in which the center of the new opening lies within the predrilled opening (30). The device (10) comprises a dowel plug (32) having a plurality of holes (34) therethrough. The dowel plug (32) is inserted into the predrilled opening (30), so that the pilot bit (26) of the hole saw (12) can be positioned in a rotatable manner into one of the holes (34) in the dowel plug (32) on center or off center with the predrilled opening (30) in the workpiece (28).

Abstract: This invention provides a system for using a portable tool for assisting the making of holes in installed pipes, such as water pipes and the like, to prepare for interconnected piping. Such system preferably utilizes a hole saw guide bushing which is contained in a clamp-head at the end of the fixed jaw of a "Vise-Grip.TM."-like device. Such clamp-head accommodates various sizes of guide bushings and hole-saws for making various size holes in various size pipes. Other features assist accurate hole positioning, e.g., horizontal and vertical levels, center marks, and V-shaped holding surfaces on the clamp-heads.

Abstract: A drill centering device for use in combination with a drill bit for drilling centered holes in an end of a generally longitudinal piece of stock, comprises a guide box having a centrally aligned inner channel dimensioned for directing a drill bit therethrough and an annular rim extending from one end of the guide box. The annular rim is symmetrical about the inner restrictive channel of the guide box and dimensioned to receive a piece of stock for drilling centered holes in the same.

Abstract: A bushing system for guiding a bore forming apparatus within a machine tool includes a guide bushing with a central bore allowing passage of a rotating and axially moving tool, with the bushing having a generally cylindrical body with a radially extending flange having a free end and a stepped area adapted for engagement with the retainer. The retainer includes a complementary arcuate relief formed in an outer cylindrical surface for allowing the retainer to engage a stepped area formed in the guide bushing's radially extending flange. The retainer further includes a second radially extending flange with a diameter larger than the diameter of the retainer's body such that the second radially extending flange with abuttingly engage the free end of the guide bushing to maintain the bushing in axial register with a machine tool mounting fixture.

Abstract: A padlock holder is provided for receiving the body of a padlock and maintaining the padlock body at a predetermined location within the holder. When the padlock body is at that location the tumbler mechanism of the padlock is in registry with a hole formed in the holder. A drill bit is positioned in the opening to drill through the padlock body and the tumbler mechanism so that the padlock can be opened.

Abstract: A method of assembling a headed bushing from a headless bushing and a bushing head, and the resulting headed bushing. Selecting a bushing head which has a deformable flange and a bushing engaging sector on its inside cylindrical wall. Selecting a headless bushing and forming a groove on its exterior surface to engage with the deformable flange, and a head engaging sector to engage with the bushing engaging sector. Assembling the two together and upsetting the flange into the groove to hold the assembly together.

Abstract: An assembly, for providing a passage for liquid between a first member comprising a liquid reservoir such as a concentrate container or storage vessel and a second member such as a liquid outlet, includes a first connector which is adapted to be mounted on the second member and comprises a piercing assembly by which an opening can be provided in the first member, and a second connector which is undetachably connected to the first member. While in use, the first and second connectors are connected to each other, and the first connector is moved relative to the second connector in such a manner that the piercing assembly forces an opening in the first member, whereby the passage is effected.

Abstract: A drill bushing is provided with a central passage therethrough for guiding a drill bit, reamer or tap in a production operation. The drill bushing includes a generally cylindrical body extending along the longitudinal axis, and first and second ends. An enlarged head is formed integral with the first end of the body and includes a first concave recess in the periphery of the head which forms a shoulder for facilitating the securing of the drill bushing to a jig plate with a locking screw. A second liner recess is also formed on the periphery of the head. The second recess forms a second shoulder which facilitates, in the alternative, the securing of the drill bushing to the jig plate, with either a locking screw or a clamp bar.

Abstract: A device and associated method for drilling a hole in the center of a broken element that is engaged within a bore, thereby enabling the broken element to be retracted by engaging the newly drilled hole. The present invention includes a collar member that defines an open central channel between two opposite ends. The collar member includes a male region adapted to engage the bore should the broken element be broken within the bore below the surface. The collar assembly also includes a female region adapted to engage the broken element, should the broken element extend out of the bore. Regardless of whether the male region engages the bore or the female region engages the broken element, the collar member aligns the open central channel over the center of the broken element. A drill bit is then advanced through the open central channel, whereby the open central channel acts as a drill guide and prevents the drill bit from wandering away from the center of the broken element.

Abstract: A chip breaker drill bushing assembly (11) for a fluted drill bit (37) is disclosed. The assembly comprises a drill bushing housing (13) and a sleeve (15). The drill busing housing (13) includes a body (17) and an outwardly protruding guide shaft (19). The guide shaft has a smooth end (31) for tightly contacting the surface of a work piece (63) to be drilled. The sleeve (15) is located in the body (17) of the housing (13), in alignment with the guide shaft. The end of the sleeve (15) facing the tip (29) of the guide shaft (19) includes a chip breaker (41). The chip breaker (41) includes two spaced-apart teeth (46a, 46b) that are defined by two helical troughs (47a, 47b) that protrude into the sleeve (15). The two helical troughs (47a, 47b) are aligned with two longitudinal apertures (33) in the outwardly protruding guide shaft (19).

Abstract: An installation method for security switches located in door jambs and connection into security system wiring is provided together with a mounting fixture for simplifying the installation. To avoid wall damage, with cylindrically packaged security switches inserted snugly in a hole drilled part way through a door jamb a few inches from the floor, an installation fixture holding a drill at an angle is inserted into the switch mounting hole for drilling at a desired angle a system wire passageway hole into the switch mounting hole wall to extending downwardly through the floor. Another drill held in the fixture at a different angle permits routing of the mounting hole wall form a wire transit channel axially adjacent to an inserted switch for passing the system wires back to connect with the security switch.

Abstract: A method of installing a combination lock deadbolt assembly includes the steps of providing a combination lock deadbolt assembly for mounting on a door surface in combination with a drill resistant hard plate. The hard plate, mounted on the outer door surface, includes legs extending through the door for attachment to the deadbolt assembly. A drill guide is provided having a tapered outer surface which corresponds to tapered openings in the combination lock deadbolt assembly. In use, the tapered drill guide is inserted into the openings in the deadbolt followed by insertion of a drill bit which drills holes through the door. After drilling each hole, the larger holes are drilled to facilitate attachment leg insertion into the door. The deadbolt can then be mounted to the door surface and to the drill resistant hard plate. A combination dial lock can then be mounted in the deadbolt assembly.

Abstract: A drill and tap guide comprises a block having appreciable thickness and one or more guide holes therethrough. The guide holes are sized to suit different diameter taps and/or drills. The guide holes are perpendicular to the plane of a block first face. The first face of the drill and tap guide is placed on a flat surface of a workpiece. A drill or tap is inserted through the appropriate guide hole, which guides the drill or tap to remain perpendicular to the workpiece flat surface during a hand drilling or tapping operation. The block may have a circular or rectangular periphery. Different combinations of guide holes to suit different size drills, tap drills, and taps can be formed in the block. In all cases, the guide holes are located close to the block periphery. A magnet can be embedded in the block to aid in holding the block on ferrous workpieces.

Abstract: A device is provided for fixing and locking a tool such as a pneumatic drill on a support or grid on which are mounted sockets. According to the invention, the tool is fixed by rotation of a crown and penetrating fingers of the crown into grooves in the socket under the action of a cylinder driving a toothed sector.

Abstract: A hole saw guide for alignment of a hole saw used to enlarge an existing hole. The hole saw guide includes a perforated cylindrical plug fitted to an existing hole. The perforation accepts the hole saw pilot drill member permitting free rotation. The perforated cylindrical plug includes a stop which prevent passage of the plug through the existing hole. The hole saw guide may include mechanisms for diametric adjustment to lock the plug in the existing hole.

Abstract: A stabilizing support attaches a tapping head to a drive having a spindle rotatable within a quill. The support includes a substantially cylindrically symmetric hollow tubular housing axially divided into two sections. A first section has a first bore sized to slip over and lock to a quill of the rotating drive, and a second section having a second bore sized to receive the tapping head therein in a close sliding fit. The housing is releasably locked to the drive quill, and a nonrotating portion of the tapping head is fixed to the housing to prevent its rotational movement relative to the housing.

Abstract: A tool for locating the positions where holes are to be drilled in a contoured workpiece includes several thin, flexible plates stacked on one another, conforming to the contour of the workpiece, and held together by fasteners. The intermediate plate has holes through its thickness sized to receive the nose bushing of a drilling machine, the holes being spaced along the length of the workpiece. The innermost plate, which contacts the workpiece and the outermost plate, include slotted holes aligned with the holes of the intermediate plate.

Abstract: The present invention provides a method and apparatus including a rotor mountable fixture for guiding a cutting tool powered by a hand held air motor to machine a gas turbine engine rotor without removing the rotor from its mountings in the engine. In one particular embodiment the fixture includes a root having the same contour as a blade root slot of a rotor, a base having a platform attached to the root, and a machining guide in the form of a bushing restrained in a guide slot operable to receive and guide a hand held air motor powered cutting tool for machining the rotor. The present invention provides an accurate means to machine a gas turbine engine rotor without removing the rotor from its mounting. In one particular embodiment a method for machining the rotor in the field is provided using a hand held air motor to power a machining tool to cut a blade damper pocket in the dovetail slot of a pressure compressor rotor.

Abstract: An index-locator pin passes through an aligned hole formed through a drill plate and juxtaposed pack-up and is displaced by a power fastener tool. A gauge pin is transversely positioned within the index-locator pin and pushes the pack-up against a drill plate in response to displacement of the index-locator pin. By maintaining the drill plate in clamping relationship against a multi-layer pack-up, a hole pattern in the drill plate may be replicated in the pack-up with high precision.

Abstract: A drill jig for producing drill hole patterns in workpieces which include a hole index rail, with at least one annular stop being adjustable transversely to a series of holes in the hole index rail. At least one lateral stop is adjustable along the hole index rail, with a slide carrying a drill bush adapted to be aligned with respect to one of the holes of the hole index rail. The slide and the at least one lateral stop are displaceably guided along the hole index rail, with the lateral stop including an elongated stop section adjustable in a stepwise manner at a lateral stop carrier in a longitudinal direction of the hole index rail. The lateral stop carrier includes a locking member.

Abstract: This invention relates to fixtures which aid in the drilling of holes for dowels and pegs. In particular, this invention relates to fixtures which aid the user in accurately positioning and guiding a drill or other boring tool into a workpiece and is of special utility in those situations in which the position of matched hole locations in adjoining or adjacent workpieces are critical. A drilling fixture is proposed which incorporates a body member and at least one perpendicular leg member wherein the leg member has a longitudinal stepped slot formed in it to receive a drill guide.The drill guide is fully adjustable along the length of the longitudinal stepped slot and may be locked in the desired location with a locking nut. The drill guide is an externally threaded cylindrical element with a flanged base and a longitudinal bore for receiving a drill bit.

Abstract: A three-sided drilling template for a door is provided that is formed from a rigid material. The first and second sides of the template are parallel and contact opposite sides of the door. The third side of the template, orthogonal to and bridging the span between the first and second sides of the template, contacts the edge of the door. A plurality of through guide holes are located in each side of the template and mark the centers of mounting holes for the mounting of operating hardware such as door locks and knobs. Markings on the template indicate the specific purpose of each through guide hole, and marked circles concentric with the through guide holes indicate the correct size of the mounting holes. A rectangular extension on the interior surface of the third side fits into a lock face recess previously formed or pre-machined in the edge of the door for accurate alignment of the template to the door.

Abstract: A chip breaker drill bushing is provided for a metal drilling apparatus. The bushing has a central channel through which a drill bit or drilling tool extends and rotates. The bushing is shaped at the workpiece end to collect metal offal carried up by the drill. Angled troughs guide the offal up and away from the workpiece and cutting edges on the end of the bushing chop the strands into small, easily handled chips.

Abstract: A drilling jig for holding cutting chips and other debris has two separable sections. A cylindrical body has one closed end and one open end. A circular cap is adapted to fit in or over the open end of the cylindrical body. Aligned axial holes are provided though the closed end of the cylindrical body and through the cap. An adhesive layer temporarily adheres the jig to a workpiece.

Abstract: An automated drilling station for use in a computer controlled manufacturing system comprising an adjustable frame structure for releasably clamping a work piece in a planar work position, a chuck assembly adapted to operatively receive a selected drill bit, a drive train for selectively moving the chuck assembly on an axis perpendicular to the plane of the work position, feed racks for storing a plurality of drill bits of various predetermined sizes, a robot assembly for transferring a selected drill bit between the feed racks and the chuck assembly at a transfer station remote from the work position, a drive train for selectively translating the chuck assembly between the transfer station and work position and between locations on one side of the work piece aligned with predetermined drilling locations in the work position and a selectively rotatable turret having bushings of various sizes disposed about the periphery thereof for selective disposition in opposed relation to the chuck assembly at each predet

Abstract: Barrel casing attached to the housing of a hand-held drill. A retractable guide arm is cantilevered from one end of the barrel casing. The cantilevered end of the guide arm has a passageway for the drill bit, and thereby guides it. A rate limiter is attached to the other end of the barrel casing and in axial alignment with it. On the inside of the barrel casing, the rate limiter is connected to the guide arm by abutment.

Abstract: In the business of supplying bushings as tool guides for machine operations a minimum of two types of bushings need to be stocked. One type is a headless press fit sleeve. The other type is a slip fit sleeve with a head at one end. The headed slip fit type is desirable but greatly more costly. Such a great number of different sizes need to to stocked by the supplier that the cost of maintaining two complete inventories, one of each type, often becomes prohibitively expensive. The invention here involved makes use of only one complete inventory of bushings of the less costly and simpler press fit type and a partial inventory of separate heads which can be fitted on the press fit sleeve, modified to only a minor degree, and in this way to supply an order for the normally more costly headed slip fit bushing.

Abstract: A rotary tool holder of the type including a stationary shell adapted to be reciprocally positioned within a bushing plate and a shaft mounted rotatably within the stationary shell. An annular space is provided between the shaft and the shell and the shell includes an enlarged diameter collar portion proximate one end of the shell and a reduced diameter pilot portion extending from the collar portion to the other end of the shell. The pilot portion is slidably received in the bushing plate and the collar portion receives a pressurized coolant fitting. Needle bearings are provided in the annular space between the shell and the shaft proximate the pilot portion and a pair of annular seals are provided in the annular space between the shell and the shaft proximate the collar portion. The annular seals are positioned on opposite sides of a radial passage formed through the collar portion and through the shaft for communication with a central axial bore in the shaft.

Abstract: There is provided by this invention a chip extraction apparatus for extracting chip swarf from a workpiece for collection in an external vacuum source. The chip extraction apparatus is comprised of a nosepiece assembly which houses a spring/atmospheric pressure actuated piston for providing telescopic capabilities to a drill bushing. The drill bushing contains an air inlet port for allowing air to be drawn into the interior fo the drill bushing where it will mix with chip swarf. The air application assists chip flow and contributes to efficient vacuum withdrawal of chip swarf from the drill flutes into the vaccum chamber of the nosepiece assembly. The chip swarf is eventually expelled through a vacuum port in the nosepiece assembly to the external vacuum source. Alternative drill bushing configurations are disclosed to provide consistent chip extraction rates for different material requirements and cutting tool types.

Abstract: A device for removing a collar coaxially fixed to a projecting end of a fastener axially extending through the surface of a substrate, the device comprising a jig having opposed base and top surfaces and a cavity open at the base surface and disposed to coaxially receive the collar when the base surface is disposed on the substrate, at least one drill bit bushing extending through the jig on an axis generally parallel to and spaced a predetermined distance from the axis of the cavity, the bushing being disposed to guide a drill bit into engagement with the collar when disposed in the cavity, and an adjustable screw for controlling the axial length of drill bit extending through the bushing.

Abstract: A fluid supply pipe (1) is drilled and tapped using a saddle (2) adhered to its surface, the drilling and tapping tools being attached to the saddle. The saddle (2) comprises a sole plate (3) snugly fitting on the pipe, and an upstanding collar (4) with a through bore (20) through which the cutting and tapping tools pass. During adhering the saddle to the pipe, adhesive is prevented from entering the bore (20) by provision of a closure member (21).

Abstract: A number of drill guides are provided for quickly setting up to drill construction holes, door handle holes, hinge holes, and drawer front panel attachment holes for construction of cabinets without excessive jigging setup time. Several tools are described for quickly squaring up cabinet panels and clamping them together while glue dries.

Abstract: A mechanical drilling aid serves for guiding a drilling tool (42) when drilling a bore into an object, in particular into a wall (39), eccentrically to an existing faulty bore (20), when the cross-sections of the faulty bore (20) and the correct bore intersect each other or extend immediately adjacent each other. In order to ensure simple and exact guiding of the drill during the drilling operation, the mechanical drilling aid comprises a guide element (14) provided with a cylindrical opening (25) for guiding the drilling tool (42).

Abstract: Bushings are embedded within a production drill plate to replicate the hole pattern of a master hole pattern plate. The exterior surface of each bushing is threaded, as is the wall of a receiving hole in the production drill plate. The pitch of the bushing and hole are the same but the pitch diameters are somewhat different so that the threads of the bushing are loosely engaged within the threads of the hole. When the bushing is potted in a properly aligned position, the containment potting material becomes compressed in the thread engagement area thereby resisting axial displacement of the bushing.

Abstract: Apparatus for precision positioning of guide bushings for roughing tools and for finishing tools so that preformed holes in workpieces may be initially subjected to a roughing operation by roughing tools and subsequently to a finishing operation by finishing tools. The guide bushings are mounted on the ends of carrier arms. The carrier arms encircle a workpiece holder. Each carrier arm is mounted for swinging movement on a pivot axis spaced radially from the workpiece holder. The carrier arms are swingable from a position in which the bushings on one end of the arms are aligned with holes in a workpiece mounted on the workpiece holder, to another position in which the guide bushings on the other end of the arms are aligned with holes in the workpiece. Power is provided for simultaneously swinging all of the carrier arms.

Abstract: A mechanical drilling aid serves for guiding a drilling tool (42) when drilling a bore into an object, in particular into a wall (39), eccentrically to an existing faulty bore (20), when the cross-sections of the faulty bore (20) and the correct bore intersect each other or extend immediately adjacent each other. In order to ensure simple and exact guiding of the drill during the drilling operation, the mechanical drilling aid comprises a guide element (14) provided with a cylindrical opening (25) for guiding the drilling tool (42).

Abstract: The invention concerns a nose piece adaptor for a manual or power feed drill. The adaptor has a hollow cylindrical sleeve (11) surrounding the drill bit and having on the outer surface of one end thereof a taper lock (13) for engagement with location studs (17) in a template (16). At its other end the sleeve (11) can be threadedly engaged or integral with the drill. The sleeve (11) has a sprung, quick-release ball (25) lock mechanism for engaging with or disengaging from a peripheral locking groove (26) of a nose piece (14) inserted into the bore of the sleeve (11). The nose piece (14) is a simple cylindrical rod with a bore (30) for the drill bit.

Abstract: A guide apparatus for drilling oblique holes comprises a fixture for supporting a wood stock at an adjustable angle to a reference surface, and a guide assembly for positioning a drill bit attached to a drill driving mechanism over the end of the wood stock and for guiding the reciprocation of the drill bit to enable the drill bit to enter the surface of the wood stock adjacent the end obliquely and to pass out of the end to form a hole for receiving a screw. The guide assembly is adjustable to vary the maximum travel of the drill bit towards the wood stock.

Abstract: Improved apparatus for threading a longitudinally divided partial hole in a machine component has a tap driving spindle selectively and reciprocally carried by a frame. On a base plate is a positioning means for holding the component in a predetermined relationship with the frame and locater means for accurately aligning the component with the tap driving spindle. A movable guide shoe that is operable in combination with the locater means opposes the partial hole to be threaded and forms temporarily an opposed partial hole that accurately guides the tap. Adjustment and retainer means are used for selective positioning of the guide shoe in relation to the tap guide hole.

Abstract: A lock collar for a drill bushing and a system for cooling a drill bit during a drilling operation are arranged so as to be incorporated into a single mechanism. The mechanism involves two assemblies, one being a locking liner embedded in a jig plate, and the other being a coolant directing assembly adapted to be mounted on a power-fed tool. There is coolant passage means in the coolant directing assembly which accepts coolant from an appropriate source and directs it through the first mentioned assembly to the cutting edge of the drill bit or other cutting tool while the cutting operation is taking place. By reverse rotation of the coolant directing assembly, that assembly can then be removed for subsequent engagement with another locking liner.

Abstract: A drill guide apparatus for use in drilling a central bore in a portion of a broken-off bolt remaining in a threaded bore. A clamp tube carries inwardly-directed setscrews for attaching the clamp tube to a stud or bolt located near the broken bolt. An arm extends adjustably through the clamp tube, and setscrews in the clamp tube hold the arm in a desired position relative to the clamp tube. A drill guide holder mountedon the arm includes setscrews which hold an appropriate drill guide tube in position to receive and guide a drill to bore the required hole in the remaining portion of the broken bolt.

Abstract: The assembly comprises in combination a fixing bushing (3) and a machining unit (6), the bushing being adapted to receive the nose of the machining unit which comprises the nose and a body. The bushing (3) comprises at its inlet mouth (9) inner guide means (13) and outer hooking means (14) and, internally, means (18, 19) for centering the machining unit (6). The unit comprises hooking elements (27) adapted to cooperate with the hooking means (14) of the bushing and slidable means (30) for locking the hooking elements (27).

Abstract: A connector and cable preparation fixture to provide a coaxial cable tap while the cable continues to pass signals. The apparatus of the present invention attaches the cable tap without shorting the conductors and without significantly changing the coaxial cable parameters which would affect the data flow therein. The fixture described herein provides a guide for a cutting operation and for the subsequent assembly of the finished connector. The connector includes a cable tap which mounts on the coaxial cable in a perpendicular manner, and a center pin which attaches to the coaxial cable center wire along the axis of the cable tap. The center pin has two prongs spaced apart in opposition to straddle the center conductor. The connector is easily installed with no measurements. The resultingconnection has a long and reliable life without causing an interruption to information or signal flow on the cable at any time.

Abstract: A two-part drill bushing assembly makes use of a sleeve, identified in the trade as a lock liner bushing which is embedded in a jig plate for reception of a separate slip renewable bushing element. Extending through the renewable bushing element is an axial bore within which a drill bit rotates during operation on a workpiece. On the exterior of the renewable bushing element is a helical shoulder which, when rotated, interlocks with a locking shoulder of the liner bushing. The invention involves a stiff wire rod, a mid-portion of which is bent to form the locking shoulder and from which legs extend to positions of snapped-on attachment to the liner bushing.

Abstract: A turret coupling (13) for locking a tool (10) in a desired angular position relative to a workpiece (16), where the tool is locked onto the workpiece by a fixture (19) through a nose piece (12), is comprised of a sleeve (13a) notched on the rim. The sleeve is closely fitted over the lower end of the tool, or a nose adapter (25), and held by a retainer (13b) threaded into the tool or the adapter. A latch key (24) locks the tool to the sleeve. To reposition the tool relative to the nose piece, a shaft (28) is lifted by a lever (26) having a return spring (22) under a button (21).

Abstract: A protective device for a fabric or other soft wall covering upon the drilling of a hole therethrough into a support wall behind the covering has a sleeve which closely surrounds the drill bit, a spring braced against the sleeve and a roller bearing to permit immobilization of the sleeve as the drill bit rotates and is axially displaced in the latter. The sleeve has a circular array of pins projecting from its face turned away from the chuck and adapted to penetrate the wall covering. A light supplementary spring can be provided on this side of the sleeve as well to compress the wall covering.