Abstract: Methods and apparatus for locating and drilling pilot holes. Known systems are time-consuming and difficult to carry out and do not reliably result in straight and accurate pilot holes. The invention provides easy and accurate location and drilling and accurate alignment with an initial hole on an inaccessible surface. Clamp jaws (22, 50) are spring loaded into a closed position. Pliers (82) engage jaw (50) and head (64) of a shaft (60) extending through jaw (50) and attached to jaw (22). Pliers (82) are squeezed to move jaw (50) along shaft (60) away from jaw (22). Clamp (22, 50) is placed around a workpiece (10, 8, 15) with a pilot (38) carried by jaw (22) engaging a back surface pilot hole (16). Pliers (82) are released to allow spring (66) on shaft (60) to clamp jaws (22, 50) around workpiece (10, 8, 15). Drill bit (90) is introduced into a bushing (54) in jaw (50).

Abstract: Disclosed is a nose piece for a power drill and hand drill with certain modifications made to nose piece and using telescopic bushing, having a drill motor, a drill spindle and a drill bit attached to the spindle, the nose piece being capable of longitudinal adjustment with respect to the length of the drill bit and radial adjustment of its position with respect to the drill motor and the work piece.

Abstract: A jig for locating holes to be drilled in two panels (P1, P2), in particular wood panels, for assembling the panels at right angles to each other by means of dowels (82) lodged in the holes. The jig comprises a housing (10) having two perpendicular branches (14, 16) each of which slidably receives a corresponding plate having a drilling bush (32, 34) passing therethrough, and means (68) for moving the two plates in synchronism with one another as a function of the thickness of the panels.

Abstract: In its preferred embodiment this jig is a rigid foam plastic casting specific to a particular type of workpiece. It enables accurate fastening of workpiece to external structure with flathead screws. Each such workpiece has a plurality of countersunk orifices of identical size and distribution pattern. Jig and workpiece are of general rectangular plan, the jig thick enough to allow for integral functional guide holes. Jig is fitted to workpiece and the associated two held against an external structure while pilot holes are drilled into the structure through the jig guide holes centered with respect to the workpiece orifices. Proper orientation of jig to workpiece is obtained and maintained by a plurality of truncated conical protuberances on the jig extending from one of its two major parallel surfaces. These protuberances are complementary in shape and distribution pattern to the countersunk orifices of the workpiece.

Abstract: A dowelling jig (1) comprises a through-hole (5) for guiding a drill (18), abutments (12, 12) and cantilever springs (13, 13) for clipping the jig to one edge (10) of boarding (11) for drilling dowel-holes (2, 2, 2) in the edge, and a peg (9) for insertion in each dowel-hole (2) in turn for drilling the corresponding dowel-hole (3, 3, 3) in a face (14) of a second piece of boarding (15). The through-hole (5) extends between parallel faces (6) to which face (7) is perpendicular. Through-hole (5) axis is perpendicular to faces (6) and (19) while peg (9) is perpendicular to face (7). Abutments (12, 12) align face (19) of boarding (11) with face (7) for drilling of holes (2, 2).

Abstract: A jig is disclosed having a unique clamping assembly and tool support assembly having a novel tool support bushing allowing for accurate drilling or reaming in limited space and around obstructions.

Abstract: A pressure foot assembly is provided which makes use of a pressure ring mounted in a manner which allows it to float laterally around an end mill cutter which is used to delete circuit lands on a subcomposite printed circuit panel. Enough pressure is provided to keep the ring from rotating and allows the ring to impart a concentrated force very close around the cutter, thus holding the deleted circuit line in place during cutting and keeping cutting burrs to a minimum.

Abstract: The depth control assembly for attachment at one end to a machine tool and at the other end to a drill plate of a jig having selected guide holes positioned over points to be drilled in a production part. The depth control assembly is a spring-loaded adaptor which spaces the drill a constant distance from the production part, regardless of differences in distance between the face of the drill plate and the production part. Through the use of the depth control assembly, an operator can drill holes of a constant depth in the production part without taking separate measurements and making new depth adjustments at each hole location.

Abstract: A jig which is for guiding a drill bit into a workpiece and which includes opposed end plates and jaw members for clamping the workpiece. A guide template is mounted between the end plates to travel in an arcuate path relative to the jaw members.

Abstract: A workpiece drilling machine includes to be moved to any of several drilling locations along the workpiece. A plurality of indexing detents is formed along the rail coinciding with each drilling location. A cam follower on the drill carriage is engageable with the detents to coarsely position the drill carriage. An index-cancelling device is associated with each detent and controllable by a preprogrammed input device to determine which of the detents is to be available for engagement by the cam follower. The programmed input device has a visual marking thereon corresponding to the information encoded therein and a visually perceptible status readout is controlled by the index-cancelling means to permit visual verification that the index-cancelling devices are arranged in accordance with the desired pattern.

Abstract: Drill structure including an improved drill with indexable inserts, the drill including a straight fluted end with increased chip clearance and decreased clearance between the outer periphery of the end and the bore surface for reduced chip binding. The drill includes a grooved barrel which is received in a bushing fixed with respect to the workpiece to prevent wobble and to precisely locate the bore.

Abstract: A drilling jig is disclosed which not only permits the drilling of multiple holes on a flat surface or on the edges of a workpiece, but accessories are also disclosed which permit the drilling jig to be converted into a divider, a compass, inside and outside calibers, and a cutting guide for use with either a knife or a saber saw blade. The drilling jig consists of one or more elements having fixed drill guide bushings located along their lengths fastened together end to end. An element having a pair of drill guide bushings which are adjustable along the length of this element is also joined to the elements having fixed drill bushings so as to enable the jig to set any spacing along the length of the work. Adjustable guides are affixed to the sides of the drilling jig to enable its accurate placement on the edge of a workpiece. A device is also disclosed for fastening the elements together to enable their use as a rigid unit, while at the same time enabling them to be readily disconnected and stored.

Abstract: A tool comprises clamping members that clampingly engage a coaxial cable. Drill blocks are secured together onto a plate to which the clamping members are secured and they include opposing holes centrally disposed relative to the clamped cable to enable a drill to pass therethrough to drill opposed openings through the jacket and shielding and into the dielectric sheathing around the center conductor, whereafter the drill blocks 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 moveable signal probe is moved into electrical connection with the center conductor and ground conductor members penetrate the jacket and electrically connect with the shielding.

Abstract: A method of joining the mitred ends of two picture frame mouldings includes drilling a precisely positioned hole in the end face of each moulding and positioning a dowel in the holes prior to gluing the end faces together whereby the dowel serves to correctly relatively position the faces. Apparatus for facilitating correct positioning of the dowel holes comprises a frame moulding guiding member slidably mounted in a groove formed in a horizontal base plate. A guiding bush for a drill is provided on a vertically displaceable slide. The two edges of the guiding member nearest the slide are at 90.degree. to each other and 45.degree. to the axis of the bush. In use a frame moulding is clamped against one edge of the guiding member with the guide and slide members appropriately positioned and the end face of the moulding is drilled through the bush. The other moulding to be joined is clamped against the other edge of guiding member and similarly drilled.

Abstract: A device adapted for use with electrical discharge machining apparatus generates tapped holes in a workpiece using a threaded, hollow carbon tool. The tool is releasably connected to a reversible hydraulic motor by a coupling which feeds dielectric fluid through the interior of the tool into the space between the machining tip of the tool and the workpiece. The motor is mounted on a vertically reciprocable slide arrangement carried by a support which is mounted on the head of the conventional electrical discharge machine. The tool extends downwardly through a threaded guide which is held in spaced relationship to the workpiece by the support, thereby allowing fluid emanating from the tip of the tool to carry machined fragments upwardly out of the tapped hole. The slide includes a slide plate mounted on a pair of upright guide posts carried by the support.

Abstract: This is an attachment for electric drills by which accurate alignment for drilling may be achieved without the necessity of complicated preliminary steps. The invention comprises an elongated extension rod mounted in a particularly constructed handle which is slideable with relation to the rod and which handle has an extension through which the drill can be observed, which extension has a particular end configuration making it suitable to drill straight and accurate holes into virtually any configuration of surface and at a distance from the drill without the necessity of complicated measuring, marking and preliminary steps.

Abstract: A door lock drill assembly includes a housing with an apertured side wall and end wall, securable upon the upright edge of a door for drilling a first aperture through the door on a first axis and successively drilling a second aperture into the door edge on second axis coplanar to and at right angles to the first axis. Guides are mounted upon the side wall and end wall and extend at right angles thereto. A hole saw is reciprocally mounted upon one guide coincident with the first axis, and includes a projecting coaxial drill shaft. A drill bit is reciprocally mounted upon the other guide coincident with the second axis, and includes a projecting coaxial drill shaft. The drill shafts are adapted to be selectively and alternately power driven and fed into the door by the application thereto of a power driven tool.

Abstract: A door boring jig system for aligning a cross bore and edge hole in a door, including a pair of spaced clamping jaws; a bore hole in one clamping jaw locating the position of the cross bore; adjustment means for moving the clamping jaws toward and away from each other to adjust to the width of a door to be bored; a bushing mounting hole in the other clamping jaw aligned with the first bore hole; a split bushing having a flange at one end and a hinge at each end, each hinge including a pair of pins mounted in separate parts of the split bushing and a link pivotably mounted to both pins; each link being loosely fitted to at least one of the pins to enable the bushing parts to slide or translate as well as pivot or rotate relative to each other; guide means mounted between the clamping jaws remote from the first hole and bushing mounting hole and having an edge hole guide for defining the position of the edge hole; and edge bevel accommodator means including first and second mounting means carried by the guide m

Abstract: A work hold-down for use with a drill press and like machine tools including a sleeve loosely slidable along a column and contractible for clamping to the column, an arm extending from the sleeve over a work table, and a presser depending from the arm remote from the sleeve for downward pressing engagement for a work piece on the table when the sleeve is contracted.

Abstract: A repair tool for performing quick, inexpensive and almost invisible repairs on fabrics which have been subjected to local damage. The tool comprises a base plate having core pins and ring pins projecting upwardly therefrom. An annular holding ring overfits the base plate and sandwiches the fabric to be repaired therebetween. A rotary knob including a circular razor turns within the holding ring central opening to cut a perfect circular hole in the fabric to remove the damaged area. The tool is utilized to cut a similar circular patch from an undamaged portion of the fabric. The patch is then applied to the circular hole in the damaged fabric and is secured thereto by rearwardly positioned adhesive faced material to provide an almost invisible repair.

Abstract: A boring tool guide device is disclosed in which there is included a standardized power source connector suitable for coupling with a moving power source, a boring tool, surfaces to mate with jigs and fixtures, a pre-set depth control spacer, and yieldable means for automatic retraction of the boring tool from the work piece.

Abstract: A work hold-down including a sleeve engaged about a column for free slidability and tiltability relative to the column, the sleeve being contractible for urgence from a tilted position toward a longitudinal position on the column, and an arm extending from the sleeve for movement therewith, the arm being downwardly engageable with a resting workpiece with the arm swung at least partially upwardly to releasably clamp the workpiece in position.

Abstract: A clamping and drill guide apparatus which is utilized by an operator to aid in manually drilling holes in work pieces which have an arcuate contour. The apparatus includes a first clamping member which has a multiplicity of openings axially passing through the first clamping member in a vertical direction. A second clamping member located in alignment with the first clamping member and below such includes a multiplicity of threaded through openings which axially pass in the vertical direction and are alignable with each of the through openings in the first clamping member. A pair of screw and nut members provide for clamping the first member to the second member when a work piece is inserted therebetween. Further, the apparatus provides a mechanism for axially aligning the work piece between the first member and the second member.