Abstract: The disclosure defined by this invention describes a structure which allows free movement of a cable of an electric tool. The structure is installed at the end of the handle of the electric tool and generally includes a seat cover, a cable clamping tube, and a cable tail stop. The seat cover includes a connecting chamber connected to the cable clamping tube. The cable is passed through the cable tail stop which passes through the inner and outer spaces of the handle. Hence, the cable may turn relative to the electric tool at any bending angle and the relative position between the cable and the electric tool may be easily arranged. Furthermore, the cable will not be easily damaged.

Abstract: A tool for enlarging the size of an existing bore to a selected enlarged size. The tool has a drill sized to define the enlarged bore, and a guide having a cylindrical body sized so that the guide can be rotated in the existing bore. The guide and drill including cooperating structures for releasably interconnecting the guide and the drill with the guide and drill coaxially aligned whereby, with the guide releasable secured to the drill, the guide can be located within the original hole to guide the cutting action of the drill as it enlarges the original hole.

Abstract: A cylindrical tool bit holder has a rotatably operable cylindrical cover for access to clip mounted tool chuck and tool bits disposed on the inside of the cover, and an integral clip affixed to the holder body for tool belt mounting of the holder, whereby the user with the holder belt mounted, rotatably removes the cover and inspects the array of tool bits and then in turn with the other hand removes the chuck for assembly to the hand tool or then removes a tool bit for assembly to the chuck. After removal of the chuck and tool bit, the cover is rotatably replaced on the cylindrical body of the holder and rotated no more than 120.degree. for locking engagement of the cover on the body. The cover is formed with equally spaced flexible tabs each having respective buttons for slidably engaging into holes on the body, for locking and unlocking the cover to the body. The cover is removed and replaced with the user using only one hand.

Abstract: A machine for use underwater and therefor subject to ambient hydrostatic pressure for tapping a pressurized pipeline has an elongated tubular tapping machine body with a boring bar therein that receives a cutter at its lower end. A passageway in a lower end portion of the tapping machine body senses the internal pressure of a pipeline after the pipeline is penetrated by the cutter, the passageway being connected to a pressure equalizer having communication with the interior of the tapping machine body to thereby balance hydraulic forces applied to the boring bar during a tapping operation.

Abstract: A control arm system, whose first support bar is passed through by a vertical post, enabling the first support bar to swivel round horizontally by any angle, the far end of the first support bar carrying a vertical rod, which in turn passes through a first link support to enable the first link support to swivel around the far end of the first support bar horizontally; while the first link support is further provided with two bolts that are mounted vertically above each other, pointing in a horizontal direction, and which serve to hold a second support bar, made of two parallel link bars of equal length, in a way that it is movable up and down with the two bolts as cardinal points, the far end of the second support bar in turn being connected to a second link support, which holds a rotary tool, being held by two bolts mounted vertically above each other, pointing in a horizontal direction, where the distance between the two bolts of the second link support and the two bolts of the first link support is equal;

Abstract: An alignment pin has a first cylindrical portion having a first diameter equal to the outer diameter of a work piece, and axially aligned therewith is a second cylindrical portion having a second diameter equal to the inner diameter of a work piece. The pin is inserted into a tube squaring machine to align the cutting tool of the machine for squaring a work piece having outer and inner diameters equal to the first and second diameters of the pin.

Abstract: A integral lighting assembly on an electric power drill. The lighting assembly is powered by the same electrical power source which drives the drill. The lighting assembly provides improved illumination of working or drilling surfaces. The lighting assembly is mounted on a housing that is movable between open and closed positions to turn a light on and off, respectively.

Abstract: A device for removing debris from a cup of a hole saw having a resilient wire bent so as to have an arc-like configuration with a gripping area formed thereon. The resilient wire has a first end extending inwardly and upwardly toward the gripping area. The resilient wire has a second end extending inwardly and upwardly toward the gripping area. The second end is at an opposite end of the resilient wire from the first end. The first end is angled outwardly from a side of a plane of the resilient wire. The second end is angled outwardly from an opposite side of the plane of the resilient wire. Each of the first and second ends has a rounded end point. The first and second ends extend upwardly from a bottom of the resilient wire at an angle of less than 90 degrees.

Abstract: The device is equipped with a taper shank (23), a stationary member axially tapered shape (33), and a connecting member (49). The taper shank (23) is fitted in a deep portion of a shank receiving portion with a taper bore (5) formed at the tip portion of a spindle in such a manner that installation and removal are possible, and is fixedly connected to the spindle (3). The stationary member (33) is rotatably connected to the taper shank (23), and is located in the taper bore (5) with a clearance (35) and has a spray nozzle (37) for spraying cleaning fluid into the taper bore (5) and an inside passage (39). The connecting member (49) is connected, at one end thereof, to the stationary member (33) and is connected, at the other end thereof, to a supply block (13) located at the tip portion of a spindle head (1), and has a connecting passage (53) for continuously connecting a supply hole (15) and the spray nozzle (37).

Abstract: A bowl cutter for enlarging cylinder head valve bowls and the like that includes at least one cutting blade with first and second cutting edges. The bowl cutter further includes a body with at least one cutter mount including a clamp that securely holds the cutting blade at a preselected angular position. The cutting blade is pivotably connected to the body for angular adjustment of the cutting blade, and the clamp securely holds the cutting blade at a selected angular position wherein the first cutting edge is positioned to remove material from the base portion of an associated valve bowl, and the second cutting edge is positioned to remove material from a sidewall portion of an associated valve bowl.

Abstract: The spindle position orientation apparatus of a boring machine includes a main spindle attached to a casing and around which a cylindrical cam is fixed, a slider disposed on a guide rod to be movable right and left thereby rotating the cylindrical cam, and a limit switch which is opened and closed by a dog attached to a piston. The piston is disposed in a hydraulic cylinder fixed to the casing, one end of the piston is fixed to the slider and the dog is formed on the other end.

Abstract: A detachable handle is provided on hand-held power tools, such as spiral cutting tools, in which cuts are made by positioning the axis of the cutting tool motor housing perpendicular to a workpiece surface, and moving a cutting tool bit through the workpiece in a direction perpendicular to the axis of the bit to remove material from the workpiece. A gripping surface of the detachable handle is aligned substantially parallel with the axis of the cutting tool housing. The detachable handle allows a cutting tool to be grasped firmly and comfortably with two hands, with one hand grasping the detachable handle and the other hand grasping the housing of the cutting tool to improve cutting accuracy and reduce user fatigue. The cutting tool housing is preferably provided with lugs extending therefrom, whereby the detachable handle may be detachably attached to the cutting tool.

Abstract: A tool holding assembly for placement around a handle portion and/or a body portion of a portable hand drill. The assembly includes a first elastic sleeve and a second elastic sleeve which are adapted for placement over the handle portion of the drill. The second sleeve partially overlaps the first sleeve, thereby providing additional tension to retain drill bits and other tools against the handle portion of the drill. The assembly may also include a third elastic sleeve which is adapted for placement over the body portion of the drill, and which is particularly disposed for retaining an elongate shank of a drill bit or the like. Together the various sleeves allow drill accessories such as drill bits, drill gimlets, and related tools to be retained upon the drill by tension of the elastic sleeves against the drill. The elastic sleeves are formed of any resilient material, however, rubber is preferred.

Abstract: A handle retainer includes a generally cylindrical, hollow body with first and second ends. The first end is C-shaped and defines a central opening. The second end is closed. The retainer is useful for mounting over a handle and receiver assembly in which the receiver is mounted on a shaft and the handle and receiver include mutually facing projections and recesses which are interlocked in the coupled condition. The C-shaped first end of the retainer is received behind the handle receiver with the shaft being positioned within the central opening, while the closed second end is received against a head of the handle. The retainer preferably includes a recess for receiving the handle head in a snap fit fashion.

Abstract: The present invention uses a collar that fits over a nose and a locking cylinder of a chuck of the drilling machine. The collar has a cutout section to accommodate the chuck key including the key gear when it is engaged with the beveled gear of the locking cylinder. The collar has a first bore of a first diameter with is slightly larger than the outer diameter of the nose to provide a tight fit between the collar and the nose of the chuck. A fastener is used to attach the collar to the nose of the chuck. A second bore has a second diameter to fit over at least the beveled gear of the locking cylinder. The second diameter is large enough to provide a clearance so that the locking cylinder is free to rotate within the collar. Turning the chuck key about a key axis opens or closes the jaws of the chuck to grip or release a bit placed along a drill axis of the drilling machine.

Abstract: The invention relates to a tool holder with a base part, which has a base plate and a tool-receiving chamber enclosed by side walls, and with a cover. At least one tool-receiving box for elongate tools, in particular drill bits, is arranged in the tool-receiving chamber. The tool-receiving box is arranged for swing action in the tool-receiving chamber such that tools which are located in the tool-receiving box can be pivoted, when the cover is open, from an at least approximately horizontal position into an at least approximately vertical position. At least one curved handle is fastened in an articulated manner on the tool-receiving box for the purpose of executing the swing action of the latter, and a securing device for fixing the tool-receiving box in an at least approximately vertical position is provided on a side wall of the base part.

Abstract: A magnetic positioning system is provided for assisting in positioning a fastening element at a desired concealed internal location such as in a preformed opening in an interlocking nail in a long bone of a limb of a patient who has suffered a bone fracture. The arrangement includes: a first permanent ("target") magnet positioned at the internal location and a positioning device for a second permanent ("targeting") magnet. The positioning device comprises a hand-held drill and a magnetic aiming device mounted on the drill. The aiming device including a pivot member including the second magnet is disposed at one end thereof and having an axial bore. A mount for the pivot member permits three degrees of movement of the pivot member so as to enable the second magnet to align with the first magnet. The positioning device also includes a guide pin which is insertable into the axial bore and which is engaged by the drill chuck of the drill when the magnets are aligned.

Abstract: A method and apparatus for drilling a curved bore are disclosed, wherein the apparatus includes a handle (20) and a removable cartridge (174) in which cutting bits (240) are disposed to produce the bore. The handle includes a trigger (66), (66'), or (66"), which the user squeezes toward a grip (24) of the handle to both energize a pneumatic motor (42) and to advance the opposed cutting bits in curved arcs at different rates. As the trigger is squeezed, a curved guide arm (234) conveying one of the cutting bits is advanced more rapidly than the other curved guide arm, passing a median point in the bore and then being withdrawn as the other curved guide arm and cutting bit are advanced past the median point. Thus, interference between the two cutting bits is avoided and a clean bore hole is produced. In addition, the removable cartridge minimizes breakage of a flexible drive cable (238) used to transmit rotational force to the cutting bits from rotating left and right extended drive shafts (190) and 192).

Abstract: A handle structure of a power tool comprises a handle portion continuously formed with the main body of the power tool and a gutter-like soft grip for covering the handle portion, the soft grip having two first engaging projections on its inner surface and two second engaging pieces provided on each edge of the soft grip, the handle portion having two first receiving recesses provided on an arched receiving surface for receiving the soft grip to detachably engage the two first engaging projections and the second receiving grooves provided between the receiving surface and an outer front side surface of the handle portion for detachably receiving the second engaging pieces, the first engaging recesses and the second engaging grooves being completely separated from a space provided in the front portion of the handle portion for accommodating wires and the like.

Abstract: A drill press having an assembly for preventing a drawer from being completely removed from a drill press. The drill press has a base in which the drawer is received, the base having an opening formed between two side portions of a bottom member of the base. Each of the side portions has a plate fixedly engaged thereto with a part of the plate extending into the opening and having an aperture formed therein. A positioning element is fixedly engaged to each plate and has an extension extending through the aperture. The extension of each positioning element has a first and a second inclined surface formed on a top end thereof. The drawer has a first stop and a second stop laterally extending from each of the two sides thereof, wherein the first stop is shorter than that of the second stop and the drawer is stopped by the second stop being blocked by the extension of the positioning element.

Abstract: A speed reducer assembly for use with a power hand drill comprising a speed reducer connected to the rotating hub of the drill and having a gear arrangement including a first rotating member and a second rotating member, the second rotating at a speed slower than the first rotating member, and comprising a clamp removably positionable around the speed reducer and including a handle such that when the handle is held stationary, the speed reducer is prevented from rotating when the drill is energized.

Abstract: A tool with changeable working tips has a tool shaft with an attachment end adapted to receive the attachment end of a working tip in freely removable engagement therewith. A sleeve is moved over the engagement of the shaft and working tip to securely hold the shaft and working tip together in engaged position so that any rotation or other movement of the shaft is transferred to the working tip. The sleeve is removable from around the engagement ends of the shaft and working tip, such as by removal from the tool or retraction into the tool, to allow the working tip to be removed from engagement with the shaft and a different working tip to be engaged with the shaft. The sleeve is replaced over the engagement of the engagement ends to hold the different working tip in place.

Abstract: A cavity wall which is usually made with a hollow concrete block as the inner wythe and brick as the outer wythe is disclosed. A special purpose insertion tool is fitted to a standard hammer tool. A center pin is provided in the insertion tool made with an indent to match the pointed end of the tie. The pin is then pressed into the SDS fitting which is the connection into the drill. The tie end is supported by a short sleeve which, when it contacts the face of the wall, retracts against a spring until the tie driving is completed. A modified embodiment of the adapter recognizes that the tie when activated by the hammer invariably rotates clockwise. Accordingly, if the spring is wound clockwise, the bottom tail end will dig into its seat. On the other hand, if it is wound counterclockwise, it rotates in a "tail skid" relationship to the seat.

Abstract: An electric hand drill set includes a case constituted by a casing closeable by a cover to define therein a first interior space and a second interior space. A hand drill is received and removably held within the first interior space. A power converting and supplying device, such as an adaptor, is received and removably held within the second interior space. The power converting and supplying device has an extension cord adapted to connect to an external power source. The hand drill has and is powered by a rechargeable battery set which is electrically connectable to and thus chargeable by the power converting and supplying device. The charging of the battery set is indicated by a charging indicator. The cover has a window formed thereon, opposing the charging indicator to allow user to monitor the charging of the battery set.

Abstract: A magnetic positioning system is provided for assisting in positioning a fastening element at a desired concealed internal location such as in a preformed opening in an interlocking nail in a long bone of a limb of a patient who has suffered a bone fracture. The arrangement includes: a first permanent ("target") magnet positioned at the internal location and a positioning device for a second permanent ("targeting") magnet. The positioning device comprises a hand-held drill and a magnetic aiming device mounted on the drill. The aiming device including a pivot member including the second magnet is disposed at one end thereof and having an axial bore. A mount for the pivot member permits three degrees of movement of the pivot member so as to enable the second magnet to align with the first magnet. The positioning device also includes a guide pin which is insertable into the axial bore and which is engaged by the drill chuck of the drill when the magnets are aligned.

Abstract: A method and apparatus for drilling a curved bore are disclosed, wherein the apparatus includes a handle (20) and a removable cartridge (174) in which cutting bits (240) are disposed to produce the bore. The handle includes a trigger (66), (66'), or (66"), which the user squeezes toward a grip (24) of the handle to both energize a pneumatic motor (42) and to advance the opposed cutting bits in curved arcs at different rates. As the trigger is squeezed, a curved guide arm (234) conveying one of the cutting bits is advanced more rapidly than the other curved guide arm, passing a median point in the bore and then being withdrawn as the other curved guide arm and cutting bit are advanced past the median point. Thus, interference between the two cutting bits is avoided and a clean bore hole is produced. In addition, the removable cartridge minimizes breakage of a flexible drive cable (238) used to transmit rotational force to the cutting bits from rotating left and right extended drive shafts (190 and 192).

Abstract: A hand power tool has a tool holder, and a blocking device for the tool holder, the blocking device being connectable with the tool holder and provided with a key unlockable blocking body which secured the blocking device from undesired withdrawal. When the blocking body is connected with the tool holder it blocks the tool holder from insertion of a tool.

Abstract: An improved collet lock arrangement for a hand-held power tool having a housing is provided. The collet lock arrangement includes a powered rotatable shaft including a base portion and distal end portion defining a collet for adaptably connecting a driver tool attachment thereto and a locking structure for securely locking the shaft to the housing to selectively prevent the shaft from rotating when in a locked position while allowing the shaft to freely rotate in an unlocked position. The locking structure has a locking sleeve coaxially coupled around the shaft for axial movement relative thereto between the locked and unlocked positions, a clamp nut fixedly connected to the housing, and a sleeve guide non-rotatably coupling the locking sleeve to the clamp nut. The clamp nut and sleeve guide are coaxially arranged for coaxially receiving therethrough the shaft and the locking sleeve.

Abstract: An electrically energized hand drill (10) that incorporates a hand, wrist and forearm support (50). The drill (10) is ergonomically designed, in combination with the support (50), to reduce incidents of repetitive-use injuries and cumulative-effect traumas. The drill design includes a housing (12) having on its rear side (12B) an upper and lower handle support (30, 32) that support a substantially vertical handle (34). The handle has a trigger switch (35) that when depressed by the middle finger, a battery power-pack housing (38), located above the upper handle support, supplies power to an internal electrical circuit (14) that distributes the power to operate the drill (10). Located on the housing's lower section rear side (12B) is the hand, wrist and forearm support (50).

Abstract: A method and apparatus for aligning punch and die blocks or retainers in order to bore dowel-receiving and screw-receiving holes in shoes of die sets.

Abstract: A method and a device for preventing a drilling chip from winding around a drill bit and for removing the drilling chip deposited in flutes of the drill bit comprising a drill bit acting as a driving member and a driven gear having at least one tooth engageable with flutes of the drill bit. As the drill bit is turned to drill a hole, the driven gear is actuated to turn such that the tooth of the driven gear engages the flute of the drill bit so as to scrape off any drilling chip deposited in the flute of the drill bit and to prevent the drilling chip from winding around the drill bit in action. The driven gear is rotatably and movably fastened to a support rod which is in turn fastened to a drill press.

Abstract: A method and apparatus for forming cleanly defined holes through reinforced metal matrix material includes a drill bit with a shank portion and flutes on said shank portion, the drill bit capable of withstanding a chip load of at least about 0.008 inch/rev/flute, and preferably in the range of from about 0.008 inch/rev/flute to about 0.012 inch/rev/flute, achieved through turning the bit at a speed within the range of about 18 surface feet per minute ("sfpm") to about 20 sfpm, and advancing the bit at an aggressive rate through the metal matrix material at a rate of from about 3 inches per minute to about 6 inches per minute.

Abstract: A drill includes: a drill housing having a chuck collar of the drill made as a polygonal prism or a cylindrical collar having at least a secant flat surface formed thereon, a central drilling tool axially mounted in the drill housing, and a sleeve member having a hollow bore portion centrally formed through the sleeve member, having a coupling adapter formed on a proximal end of the sleeve member concentrically detachably secured to the chuck collar of the drill housing and having a screw driver member detachably mounted on a distal end of the sleeve member, whereby upon coupling of the sleeve member secured with the screw driver member onto the chuck collar of the drill, the hollow sleeve member on the drill will encase the central drilling tool previously axially mounted in the drill housing without first dismantling the central drilling tool for convenient replaceable uses of the drill.

Abstract: An elongate pair of spaced support flanges is arranged in a parallel coextensive relationship pivotally mounting an elongate housing at a first end of the flanges, with the second end of the flanges having a support yoke oriented at an acute angle relative to the support flanges, such that a drill member mounted onto the yoke between the support flanges is in operative communication with the elongate housing, with the elongate housing mounting a circular saw at an obtuse angular orientation relative to the drill to provide for angled cutting and clearance during an angle cut.

Abstract: A method and apparatus for arresting structural termite infestation while eliminating the risk of poison exposure to occupants of the structure includes a power tool for drilling holes in wood members of a structure, implanting pellets of termite poison within the drilled holes, and sealing the holes. The tool includes a tubular body portion joined to a storage portion that stores a plurality of packages of pellets of termite poison. A platen assembly is secured to the storage portion and adapted to impinge on a wood member of a structure. The tubular body encloses a reversible drive motor connected through a gear train to rotate and translate the drill assembly reciprocally in a guideway. Cellulose balls impregnated with poison or insecticide or flagellacidal agents are grouped in loads, each load packaged and disposed in the tool parallel to the guideway, with a plug cork is disposed at the proximal end of each load.

Abstract: An ergonomically adjustable handle for attachment to the body of a tool has a handle member with first and second ends with an axis between. Provision for attaching the first end of the handle to the tool body allows rotation of the handle about the axis through the attachment point. A pivot point is located on the axis of the handle member near the first end and permits deflection of the second end of the handle with respect to the first end. In addition, an outer layer portion of the handle member near the second end may be rotated about its axis to provide a comfortable position for the ellipsoidal cross section of the handle. Finally, clamping provisions at the articulation point and the two rotation mechanisms secure the handle in the desired position.

Abstract: A biscuit joiner 11 has a pair of selectively usable retractable antiskid pin subassemblies 13, 15 for increasing the frictional resistance of the shoe assembly 23 with a workpiece when making a cut in the workpiece. Pins 19, 21 are biased forwardly to an extended position by a spring 45. To permit selective use of the pins 19, 21, a retractor 47 retains pins 19, 21 in a retracted position. Retractor 47 preferably comprises a cam 59 and a cam follower 61 and is actuated and deactuated by rotation of pins 19, 21 within chambers 43. Each pin tip 55 has a plurality of peripheral points 73-76 which are particularly effective for reducing skidding on a workpiece.

Abstract: The infinitely positionable coupling system of the present invention includes a hollow outer race, a hollow inner race, and a locking assembly which permits locking of the hollow inner race to the hollow outer race in an infinite number of positions. The hollow outer race engages a nose piece and the hollow inner race threadably engages the drill housing. Accordingly, the nose piece is infinitely positionable with respect to the drill housing by positioning the hollow inner race with respect to the hollow outer race and allowing the locking assembly to hold them in position one with respect to the other.

Abstract: A retractable tool bit assembly for a tool such as an allen key. The assembly includes one or more spring loaded nestable or telescoping tubular sections together with a catch mechanism for capturing and holding the tool in its retracted position. The catch mechanism consists of a latch mechanism located in a base section and which engages a conically shaped tool head located at the inner end of the tool. The tool head adjoins an eccentric oval type neck portion which extends to a rear lip of the tool head. The latch mechanism releases when the ovular neck portion rotates about the catch members upon actuation of a rotary tool drive motor. When released, all the telescoping sections and the tool extends fully outward to a use position.

Abstract: A retractable tool bit assembly utilized in conenction with a robotic gripper type and end-effector. The apparatus includes one or more spring loaded nestable or telescoping tubular sections together with a catch mechanism for capturing and holding the tool, such as an allen key, in its retracted position. The innermost tubular section includes a threshold cap and engages and holds the tool. The catch mechanism consists of a slider type mechanism located adjacent a relatively larger outer base sction and includes means for engaging a conically or mushroom shaped rear end portion of the tool when the telescoping sections are moved to a retracted or parked position. The catch mechanism is released upon actuation of a rotary tool drive motor coupled to a circular mount and which holds the base section. When released all the telescoping sections including the tool extends fully outward to a use position.

Abstract: An adaptor is disclosed which is designed to be attached to an existing screwgun having a bit with a polygonally shaped end. The adaptor has a recess designed to drivingly receive the hexagonally shaped end of the bit and may be fixedly attached to the existing screwgun. The adaptor has gearing designed to allow rotation of a tool receiving adaptor at a much greater speed than the input speed. A saw blade may be attached to the tool receiving adaptor so that the inventive screwgun saw adaptor may be employed to convert a screwgun into a sawing device. In one embodiment of the present invention, an electrical circuit is incorporated into the adaptor which allows determination of the location of an electrical box behind a wall, which device includes a sensor and an indicator.

Abstract: A fastening apparatus for installing a ribet which includes a hollow rivet body and a mandrel, the apparatus including, a means for imparting rotational movement to a drill bit; a housing borne by the rotation means and which includes an internal operating cavity, the housing operable to support the rivet; a driving assembly borne by the housing and disposed in force receiving relation relative to the drill bit; a locking assembly borne by the housing and operable to move along a predetermined path of travel from a first unlocked position to a second locked position; and a riveting assembly positioned in the internal cavity and disposed in force receiving relation relative to the locking assembly.

Abstract: An improved cordless motor-driven electric hand tool that has an elongated body portion with a tool bit-receiving chamber at one end and a housing at the other end having a battery-receiving chamber therein. An elongated tool bit storage chamber is formed in the housing above and/or below the battery-receiving chamber and has a cover that is pivotally mounted for open and closed positions. The housing is oval shaped to create a space above and/or below the battery-receiving chamber in which the tool bit storage chamber is formed.

Abstract: The housing of the drill press is provided with a bit storage compartment. A removable cover plate for the compartment has tabs on its inner surface for detachably holding a drill bit case of the type having two shell sections hingedly connected together with each of the shell sections provided with a rack containing arcuate recesses of progressively increasing size for detachably receiving drill bits of varying diameters. The tabs on the inside of the cover plate are adopted to hold the casing shell sections in their open position thereby to make all of the drill bits accessible upon opening of the cover plate or upon removal of the same from the housing of the drill press. A secondary drill bit holder is detachably and pivotally mounted in the storage compartment for swinging movement back and forth between an access position and a storage position.

Abstract: A printed circuit board boring machine bores printed circuit boards stacked on a table, by a drill while pressing the printed circuit boards with a pressure foot. A piece having a hole through which the drill may pass is detachably mounted on a tip end portion of the pressure foot with a center of the hole being aligned with an axis of the drill. The piece may be attached to the pressure foot before the boring work so that the boards and the piece may be simultaneously bored by the drill while the hole in the piece may be used as a guide for the boring work of the boards.

Abstract: A chuck key clip 11 has a pair of spaced parallel sidewalls 17, 19 connected by a web 21. A cord receiving channel 23 and a key handle receiving channel 61 are formed by the sidewalls 17, 19 and web 21. The key channel may have an inwardly converging handle clamp 67 and an inwardly converging key shank clamp 71 to securely and detachably retain the key 13 in the clip. For comfort and ease of use, thumb depressions 107, 109 may be formed in the outer surface of sidewalls 17, 19. Web 21 may contain openings 99, 101 opposite to a cord clamping means 27 formed in the cord channel 23. Openings 99, 101 result from the method for molding the clip in a mold movable only in a single direction (i.e. without side movement). The formation of inwardly converging clamps 27, 67 in the parallel cord and key channels 23, 61 in a mold 131 without side movement simplifies the manufacturing process and contributes to the low cost of clip 11.

Abstract: A drill chuck key bearing includes an elongated support member having a pair of legs pivotally connected to the opposing ends thereof. The support member has an aperture therethrough, through which the shank of a drill chuck key is rotatably and slidably mounted. The legs have their free ends bent towards one another so as to engage a pair of opposing apertures in the drill chuck when the key is engaged with the drill chuck.

Abstract: An auxiliary handle for a drill includes a unitary member with an elongated handle portion and a collar portion. The collar portion has a circular opening sized to accomodate therein a cylindrical shoulder at the forward end of the drill. The unitary member is formed with an open slot extending from the circular opening of the collar portion into the handle portion, the open slot providing a separation in the collar portion. A clamping arrangement extends across the slot for selectively narrowing the slot to reduce the circumference of the circular opening so as to clamp the handle on the drill shoulder accommodated therein.

Abstract: For drilling a hole and machining at least its opening end without changing tools, a through-hole is drilled using a special tool, and then the same tool is moved sideways by means of a special chuck which guides the tool during machining of the drilled hole. The chuck has a locking means which when engaged holds it in a drilling position and which when disengaged allows sideways motion of a tool mounted in the chuck. The longitudinal section of the tool used, to be located within the hole during the machining operation, is situated within a curved surface having a radius just as great as that of the drill and having its center of curvature on the line about which the tool rotates during drilling.

Abstract: The present invention provides for an improved drill bit storage rack having a housing with openings of differing diameters formed therein to accommodate drill bits of differing sizes. An outer cylindrical tube member adapted for insert into a housing opening is provided and is inserted into the housing opening in contiguous contact with the drill bit storage rack. A central interior cylindrical tube member is located within the outer cylindrical tube member and is rotatably displaceable with respect thereto. The central interior cylindrical tube member includes a through opening defining an interior wall having a pair of pin members extending inwardly with respect to the interior wall. A pair of opposing cylindrical tube members are secured within and to the outer cylindrical tube member on opposing sides of the central interior cylindrical tube member for rotatably capturing the central interior cylindrical tube member therebetween.