Abstract: An apparatus for precisely aligning bolt holes in first and second adjacent drive shaft couplings, including a cam pin for being positioned in the generally aligned bolt holes in the shaft couplings and rotated to bring the bolt holes in to more precise alignment. The cam pin includes a first, relatively large diameter segment having a cylindrical wall defining a first longitudinal axis for being positioned in a precisely fitting condition in the bolt hole of the first coupling, and a second, relatively small diameter segment having a cylindrical wall defining a second longitudinal axis offset from and eccentric to the longitudinal axis of the first segment for being relatively loosely positioned in the generally aligned bolt hole of the second coupling. A cam sleeve is provided for being positioned in axial and rotational sliding relation over the small diameter segment of the cam pin and within the bolt hole of the second coupling.

Abstract: An anchor for a mine roof bolt incorporates a single large rib at the top of a segmented shell. This single large rib is forced into the wall of the bore hole by the downward movement of an associated threaded camming nut during the first few revolutions of the roof bolt. The remainder of the outer surface is generally smooth or unserrated and provides a large bearing surface which is urged against the bore hole wall upon further rotation of the bolt. The camming nut has a specific shape flaring substantially near its upper end such that a relative large area of the bore hole wall below the rib is forced into compression. When fully engaged, the camming nut compresses a tightening washer of a metal alloy softer that the camming nut or the shell. The washer is forced into the threads of the nut thereby preventing loosening of the bolt.

Abstract: A rotatable plate has a wide groove to receive a boot binding and the two fit rotatably over a protruding circular guide post on a base plate secured to a snowboard. A cap plate extends through binding and rotatable plate openings to contact the guide post with screws or bolts passing through mating holes to the snowboard. An elevated rim around the cap plate fits within a circular groove of the boot binding to allow the binding and rotatable plate to rotate relative to the cap plate. A square locking shaft with a T-shaped handle fits within a slidable sleeve having four binding tabs mating with the sides of the locking shaft. Screwing the sleeve into a lock base with tapered walls binds the binding tabs against the lock shaft to secure the locking shaft. The locking shaft may be locked with the shaft inserted in any of the lock holes in a lock ring around the perimeter of the base plate to secure the boot binding at a desired angle to the snowboard.

Abstract: A measuring device is provided, having a cylindrical connection piece (1), having a collar (2) which engages around at least one section of the connection piece (1) and is to be fastened at a measuring location, having a restraining means, by which the connection piece (1) is fastened in the collar (2), having an annular seal (3), which is arranged in the collar (2) and bears in a sealing manner against the connection piece (1), and having a thrust ring (4) which is releasably fastened in the collar (2), and, in an end position, puts the seal (3) under pressure in the axial direction, with which device mounting and demounting at the measuring location take place in one operation and with which device, during mounting, the fastening of the connection piece (1) takes place before or at the same time as the restraining of the seal (3), and with which device, during demounting, first of all the seal (3) is released and then the fastening.

Abstract: A clamp having a U-shaped clamp body which engages a profile such as a rectangular pipe on three sides, while a fourth side of the profile is engaged by a bolt which is secured by a nut and extends through conical holes in the free legs of the clamp body. Conical washers on the bolt engage the conical holes on the far side from the pipe, meaning that the bolt is located eccentrically in the holes. Tightening the bolt the nut makes the clamp body squeeze the top side and the bottom side of the pipe. The conical washers in the conical holes make the bolt squeeze the pipe in the direction of the back side of the pipe. The pipe is thus squeezed from all sides.

Abstract: A rotatable steering shaft (12) has a surface (93) that defines a tapered locking opening (92). A mounting member (14) receivable on the shaft (12) has a first locking pin passage (70). A locking pin (16) for securing the mounting member (14) to the shaft (12) has a first portion (100) receivable in the first locking pin passage (70) in the mounting member (14). The locking pin (16) also has a tapered end portion (104) receivable in the tapered locking opening (92) in the shaft to secure the mounting member to the shaft for rotation with the shaft.

Abstract: A locking apparatus includes an inner ring having a tapered outer shape and permitting a bolt of a fastener, with which construction elements are fastened, to pass therethrough, an outer plate formed with a tapered bore which receives the inner ring, a coil spring which urges the inner ring toward the outer plate, and a nut threadedly engaged with the bolt on the side close to an outer end of the coil spring. When an external force is applied to a construction so that the outer plate is displaced toward the nut, together with the construction element associated therewith, the outer plate applies a force, exerting in the direction axially of the bolt, to the inner ring. When receiving the force which has a component directed radially inwardly of the bolt, the inner ring is reduced in diameter to tighten the bolt, thereby preventing a further displacement of the outer plate and the construction element.

Abstract: A device having a fixture with a working surface and at least one hole, at least one stop rising above the working surface, a fastener, a gripping member having a first block portion and a second block portion where the first block portion is joined to the second block portion for relative movement. Each block portion has an inner wall and a gripper wall adapted to engage a workpiece, the inner walls of the first and second block portions form a through bore for receiving the fastener when the first and second block portions are joined and each inner wall has a lower radial surface and an upper conical surface.

Abstract: The present invention is a novel cleat system for efficient and reliable attachment, disengagement and reattachment to a shoe. The cleat system includes a shank and a nut. The shank includes a head on one end with a leading end on the shank opposite the head. The nut has a wall which generally defines a bore having opposed edges which define a slot at least partially extending through the wall. Displacement structure is provided on at least one of the shank and the nut which provide a mechanical advantage in translating rotary and axial forces into generally circumferential and radial forces. Threads are provided on at least one of the shank and the nut for promoting axial displacement to engage and disengage the displacement structure. Threaded engagement and disengagement of the displacement structure deform or release the wall of the nut resulting in expanding and relaxing of the nut.

Abstract: A quick latch system for attaching a toolbox to the side panels of a pickup truck. A shaft is attached to a clamp arm, forming a pivot. The shaft is inserted through a hole in the base of the toolbox, and a fastener is attached to the end of the shaft. The shaft is dropped into the box in the side panel of the pickup truck, and the clamp arm is rotated, thereby moving the fastener upwards towards the base of the toolbox. When the clamp arm is snug with the base of the toolbox, the clamp arm is pivoted to a horizontal position, clamping the toolbox to the side panel.

Abstract: An interchangeable fan blade system for a ceiling fan, made up of a set of adapters having a plurality of elongated attachment apertures that allow the adapter to be threadably fitted to virtually any type of fan support arm, and a complimentary set of interchangeable fan blades. The adapters include one of a variety of connectors for attaching one end of the fan blades to the support arm. The one end of the fan blade is configured and adapted, or otherwise provided with mating connector elements adapted to engage the connectors of the adapters, thereby allowing the fan blades to be removably attached to the adapters. A second embodiment of the interchangeable fan blade system is a set of interchangeable fan blades having a plurality of elongated attachment apertures which allow the fan blades to be secured to virtually any type of fan arm, by threading a plurality of shoulder cap screws and a plurality of male-female connectors though the plurality of attachment apertures.

Abstract: A locking fastener (14) includes a threaded bolt (16) and a nut assembly (26) comprising a torque nut (28) and a lock nut (30). The lock nut (30) is threadably received on the bolt (16) and is shiftable to a locked condition in which the lock nut thread axis (76) is misaligned relative to the bolt thread axis (24) so as to restrict rotation of the lock nut (30) relative to the bolt (16). Such misalignment is achieved by cam surfaces (48,72) defined on the torque nut (28) and the lock nut (30), wherein the cam surfaces (48,72) cooperatively shift the lock nut (30) to the locked condition when the nuts (28,30) are moved relative to one another.

Abstract: An anchor for a mine roof bolt incorporates a single large rib at the top of a segmented shell. This single large rib is forced into the wall of the bore hole by the downward movement of an associated threaded camming nut during the first few revolutions of the roof bolt. The remainder of the outer surface is generally smooth or unserrated and provides a large bearing surface which is urged against the bore hole wall upon further rotation of the bolt. The camming nut has a specific shape flaring substantially near its upper end such that a relative large area of the bore hole wall below the rib is forced into compression.

Abstract: A gripping device including a fixture having a working surface and at least one hole. A stop rises above the working surface of the fixture. A threaded fastener is provided to screw into the at least one hole in the working surface of the fixture. A gripping member is provided such that a work piece can be held in a stationary fashion between the gripping member and another element such as a stop. The gripping member includes a conical bore and an elongated bore. The elongated bore is a through bore in that it extends through the entire thickness of the gripping member. The conical bore extends through only a portion of the thickness of the gripping member. The fastener extends through both the conical and elongated bores. The elongated bore is offset towards the gripping face of the gripping element thereby enabling the gripping member to travel to an from the work piece a greater distance than gripping members employing a centrally located circular through bore.

Abstract: A quick release mechanism is provided having a drawbar with a camming lock positioned at one end and an end cap positioned at the opposing end. The camming lock includes an axle having a plurality of primary locking slots formed therein. The camming lock also includes a cam having a receiving chamber formed therein and a tongue radially projecting therefrom. A plurality of primary locking slots extend from the tongue to the receiving chamber. The receiving chamber is configured to receive the axle so that the cam can freely rotate relative to the axle and the primary locking slots can be aligned with the secondary locking slots. Selectively positioned within secondary locking slots are a series of pins and springs. When secondary locking slots and the primary locking slots are aligned, select pins extend therebetween, thereby preventing annular rotation of the cam relative to the axle.

Abstract: A male coupling with movable threaded segments, consisting of a shaft, a sleeve mounted to move along the shaft, a plurality of threaded segments surrounding the shaft and mounted to move inwardly and outwardly relative to the shaft to effectively vary the outer diameter of the assembled threaded segments, the sleeve and threaded segments including surfaces adjoining each other such that movement of the sleeve in one direction causes the threaded segments to move inwardly toward the shaft, and a spring resiliently urging the threaded segments outward.

Abstract: An improved end-link for a suspension system for a motor vehicle, such as an automobile or a light truck, is used to accommodate adjustment between first and second elements, such as a stabilizer bar and a control element, in the suspension system. The end-link includes a connecting member which has an unthreaded portion of a predetermined diameter and a threaded end portion; a first washer; first and second grommet members for engaging top and bottom surfaces, respectively, of the first element; an end cap for engagement with the second grommet; a sleeve for engagement with the end cap and for engagement with a third grommet that grips the top surface of the control element; a fourth grommet for engaging the bottom surface of the control element and a second washer.

Abstract: A novel quick release fastener system for efficient and reliable attachment, disengagement and reattachment of one or more work pieces secured by the fastener system. The fastener system includes a bolt and a nut. The bolt includes a shank with a head on one end with a leading end on the shank opposite the head. The nut has a wall which generally defines a bore having opposed edges which define a slot at least partially extending through the wall. Displacement structures are provided on the nut which provide a mechanical advantage in translating rotary and axial forces into circumferential and radial forces. Threads are provided on at least the nut for promoting axial displacement for engaging and disengaging the displacement structures. Threaded engagement and disengagement of the displacement structures deform or release the wall of the nut resulting in displacement of the opposed edges of the wall. In one embodiment the nut includes a constricting gripper which is threadedly engaged with a driving body.

Abstract: A clamping device for clamping a punch block to a jaw of a punch press assembly where the action of clamping does not disturb the alignment between the punch block and the die. The device includes a pair of cams residing in a stacked relationship with each of the cams having a tapered aperture therethrough. A bolt passes through the tapered apertures of both cams and through a bore in the jaw to engage a threaded orifice in the punch block. Each of the cams has a generally cylindrical cam surface with a flat formed therein. Once the punch block is properly aligned with the die, the bolt is lightly tightened with the flats of the two cams in planar abutment with one another such that the cylindrical axes of the cams are separated by a first distance. The cams are then rotated with the lower one of the cams rolling on the surface of the jaw.

Abstract: A device for holding a workpiece or part in a desired position. The device has a platen with a stop, a threaded shank actuator and a sliding clamping member. The actuator has a tapered head which engages an inner bearing surface of the sliding clamping member to simultaneously apply clamping forces against a workpiece and securing forces to anchor the sliding clamp member to the platen. A spring element joined to the clamping member retracts the clamping member away from the workpiece.

Abstract: A quick-connect bolt that can be inserted into a threaded receptacle without rotation and tightened with a minimum number of rotations.

Abstract: A knob closure device for operating and locking two surfaces which are axially movable with respect to the knob, which comprises: a pin that can be coupled to the first surface and is affected by two annular end grooves; a hollow body that can be coupled to the second surface and supports, so that they can move axially and rotate, the actuation knob on one side and a disengagement cylinder on the other side, the knob and the cylinder being mutually coupled; a central bushing, which is rigidly coupled to the hollow body and in which two oppositely arranged inclined slots are formed that converge toward each other and toward the free end of the bushing; two transverse shafts that are slidingly mounted in the slots and are pushed by a compression spring in tangential engagement in the annular grooves to couple the pin to the bushing; a cam profile that is rigidly coupled to the inlet of the main body, against which a diametrical stem of the knob engages that is adapted to cause the axial sliding of the end of th

Abstract: A gripping device for holding a workpiece includes a fixture with a working surface and least one hole, a stop rising above the working surface, a fastener and a gripping member. The gripping member has a through bore for receiving the fastener and a gripper wall adapted to engage the workpiece whereby the gripper member slides toward the stop and the gripper wall applies a downward inward holding force on the workpiece when the fastener is secured to the hole of the fixture.

Abstract: A fastening device for a fitting part, such as a hinge part, is provided with a fastening borehole. A bushing or a ring-shaped insertion part can be inserted in the previously drilled borehole and includes a continuous hole in an axial direction. A pin, provided with a head and penetrating the fastening borehole, is pivoted in the continuous hole. The continuous hole is positioned eccentrically in the bushing or in the ring-shaped insertion part. The pin is provided with an eccentric shaft part which protrudes over the hole and on which a clamping part is fastened.

Abstract: A method and apparatus for separably connecting a first surface to a second surface. The apparatus includes a connecting member provided with a threaded end. A rotatable body threadably engagable with the threaded end is rotatably supported against the first surface for rotation about the threaded end to separably connect the connecting member. The rotatably supported body and the connecting member are restrained from rotation. The connecting member and rotatably supported body further have a selected matching thread geometry such that a tensile load applied to the member when connected with the rotatably supported body is resolved as a torque applied to the rotatably supported body sufficient to urge the body to rotate. When the rotatably supported body is released and allowed to rotate, the threaded member translates and threadably disengages the rotatably supported body to separate the connection.

Abstract: A locking device (10) is for locking a first member (12) to a second member (14). The first and second members are mounted on a pivot pin (16) of the locking device. A lever (26) has two cams (25) adjacent the pivot pin (16) between cam followers (22a,22b) and which retain each cam (25) in position. The lever (26) is movable between a locking position, in which each cam (25) urges the second member (14) towards the first member (12) to prevent relative rotation therebetween, and a release position (FIG. 2) in which the second member (14) is free to rotate about the pivot pin (16) relative to the first member (12). Such a locking device (10) is particularly suitable for use in releasably holding a bevel block (14) against a mounting block (12) of a chop saw or the like.

Abstract: A connector for detachably connecting a first body and a second body together. The connector includes an insert which is attached to the first body. The insert has a first edge which features an outwardly inclining portion and further features an opposing edge which includes a protrusion. The connector further includes a base member attached to the second body. The base member includes a rotatable shaft which is adjacent the first edge of the insert when the insert is seated in the base member. The base member further includes an overhang which is adjacent to the opposing edge of the insert when the insert is seated in the base member and is directed toward the shaft. The shaft of the base member is shaped so as to alternately secure the insert by confining the inclined edge and the protrusion of the opposing edge of the insert member and release the insert, depending on the rotational position of the shaft.

Abstract: A cam bolt system comprising a bolt with a threaded shaft and a head on one end thereof, wherein a cross section of the shaft is trilobal in shape and wherein the trilobal shaped shaft is threaded from one end opposite the head substantially the length of the shaft to the end with the head thereon, first and second cams, each identical to the other and each having a generally circular perimeter and a triangularly shaped opening of substantially similar shape to the trilobal shape of the shaft and sized large enough so as to freely slide on the shaft, wherein the shaft extends through the openings of the first and second cams and wherein neither the first nor the second cam can substantially rotate with respect to the shaft and wherein the two cams are identically aligned with respect to the shaft, and a nut threadably engaging the shaft maintaining the first and second cams in position on the shaft.

Abstract: A device for joining two members together such as concrete segments for a tunnel lining ring includes a first sleeve for fitting in one of the members to open at a surface thereof and a second sleeve for fitting in the other member. A connecting pin with external ribbing fits in both sleeves, which have internal ribbing, the ribbing of the connecting pin and/or the ribbing of at least one of said sleeves being of resilient material and extending in a substantially parallel direction at an inclined angle to a longitudinal axis of the connecting pin when it is, in use, inserted in the sleeves. The bore of one sleeve is of greater cross-sectional area in one dimension than the bore in the other sleeve, in which other bore the connecting pin can engage as a tight fit, while being able to engage in the firstmentioned bore and traverse it in said one dimension.

Abstract: A head light structure of a car, including a protective housing consisting of a front and a rear housing, and a tail section consisting of a hollow tail end rearward extending from the rear housing and an elliptic cover. A leaf spring is disposed in the elliptic cover. A waterproof washer is disposed on a bottom of the elliptic cover for preventing external water from flowing to the wires or bulb in the elliptic cover. The elliptic cover is associated with the tail end of the rear housing by means of pressing the elliptic cover toward the tail end to be latched therewith with the leaf spring biased against a seat of a bulb to fix the same. The front housing is disposed with two inner pad ears each having a thread hole.

Abstract: A holding down device including a headed screw rod, which is inserted through the device to be held down and then a nut is screwed thereon. A lever is pivoted to the head of the headed screw rod. The lever has a headed lock bar controlled by a combination lock arranged in the lever to prevent the lever from turning about the pivot when the numbers in the lock are incorrect.

Abstract: A breakable bolt assembly comprising a pin member, a collet member and a thumb knob member. The assembly is designed to mount without the use of hand or power tools, and features a pin member which breaks apart when the shear force on it exceeds a predetermined magnitude. The pin member comprises an elongated pin body and a pin head. A proximal length portion of the pin body has a plurality of flutes transverse to the length of the pin body and spaced from each other by ribs. The diameter of the pin body at the flute most proximate the pin head is smaller than at the more distal flutes. Thus, shear force is transferred to the most proximal flute, and when the force exceeds a predetermined magnitude, the pin member breaks apart at the juncture of the pin body and pin head. The collet member has an internal passage for receiving the distal end of the pin member, and is compressible around the pin member.

Abstract: A mechanism for enabling an aircraft to carry and release a store featuring hanger. The hanger has a hollow portion which is formed with a circumferential inner recess. A circular spring ring with a diameter which is smaller than the diameter of the inner recess, is dimensioned to fit within the inner recess of the hanger and to fit completely within the inner recess when a sufficient outward radial force is exerted upon it. The mechanism further includes a cylinder which fits within the hollow portion of the hanger. When the portion of the spring ring engages the outer recess of the cylinder, the hanger and the cylinder, and, therefore, the store and the carrier, are securely connected to each other. A slidable plunger having wings near one of its ends is used for pushing the spring ring into the inner recess of the hanger.

Abstract: The present invention entails a self-locking mechanism (10) for locking a rotatable member such as a screw, bolt, lock rod, etc. In the case of a lock rod (50) that secures a tool holder (126) within a tool block (122), the self-locking mechanism (10) of the present invention includes at least one cam surface (52) connected between the lock rod (50) and a rotating carrier (14) having at least one wedge surface (26). The rotating carrier (14), wedge surface (26), and cam surface (52) are shaped and disposed such that they can be rotated by a driver (16) in unison as the lock rod (50) is rotated between locked and unlocked positions. However, the rotating carrier (14), wedge surface (26) and cam surface (52) are disposed and shaped such that the cam surface (52) and wedge surface (26) will ,under the influence of the lock rod, move to a wedged self-locking position after the lock rod (50) has assumed a locked position.

Abstract: An arm locking system for a vertical banner supporting column having horizontally disposed arms. The tubular column internally receives a nut having resilient fingers permitting unilateral installation of the nut adjacent an arm extending through holes formed in the column. A screw within the nut bears upon the arm forcing the arm against the edges of the associated column holes frictionally positioning the arm and column. A single nut and screw may be used to position a plurality of arms upon the arms being so related that the screw causes engagement of the arms portion's within the column to engage in a frictional relationship forcing the arms into contact with their associated hole edges.

Abstract: The invention relates to devices for anchoring one part (P) relative to another (M) comprising a nut (4) and a conical ring (5), the base (1) of the part to be anchored (P) made up of first part (2) around which said nut (4) passes and a second truncated cone shaped part (3) receiving the conical ring (5), a hole (6) in the anchoring part (M) receiving the base (1) and its conical ring (5), the bottom of said hole (6) being provided with spring washers (9).

Abstract: A uni-directional slack adjuster is incorporated into a hold-down tension rod or strap, such as a hold-down anchor bolt for bolting a shear wall on one floor to a shear wall or foundation wall below, when a wood floor joist assembly is in between. The slack adjuster eliminates bolt slack so that in the event of an earthquake or hurricane, the sill plate is positively anchored with no vertical bolt play, eliminating much of the cosmetic damage that is often done to the wallboard and other finished surfaces due to distortion of the wallboard framing as the sill rises abruptly until it reaches the end of travel on the hold-down bolts. The slack adjuster comprises a link in the tensioner and non-reversibly either expands or contracts axially depending on the particular embodiment.

Abstract: This key comprises a pair of elongated blocks each having a tapered recess; a tapered pin adapted to be inserted in a tubular tapered portion which is formed by bringing the pair of blocks together in such a manner that the tapered recesses confront, and mutually displaceable in the axial direction; and a clamping member adapted to be screwed into a threaded portion provided on one end of the tapered pin or the tubular tapered portion. The key obtained by assembling these parts can be fitted into a key groove provided between a driving member and a driven member. The clamping member is rotated to mutually displace the tapered pin with respect to the tubular tapered portion in the axial direction, thereby separating the blocks from each other, thus pressing the outer walls of the blocks against the inner wall of the key groove. As a result, the key is firmly fitted into the key groove, and the drive member and the driven member can be securely coupled together with a higher reliability.

Abstract: A device for holding a workpiece or part in a desired position. The device has a platen with a stop, a threaded shank actuator and a sliding clamping member. The actuator has a tapered head which engages a conical bore of the sliding clamping member simultaneously to apply clamping forces against a workpiece and securing forces to anchor the sliding clamp member to the platen.

Abstract: A universal joint (10) for a steering gear input shaft (11) includes a yoke (12), a bolt (14) movable into an installed position in the yoke, and a spring clip (22) for locking the bolt in its installed position in the yoke. The spring clip (22) moves with the bolt (14) when the bolt is moved into its installed position in the yoke (12), and has first and second portions (202, 212). The first and second portions (202, 212) of the spring clip (22) have locking positions in which the first portion (202) engages the bolt (14) and the second portion (212) interlocks with the yoke (12) to block movement of the bolt out of the yoke. The second portion (212) of the spring clip (22) moves resiliently into its locking position to interlock with the yoke (12) upon movement of the bolt (14) into its installed position in the yoke (12).

Abstract: The rockbolt anchoring head comprises a first wedge member with a wedge surface and a passage to receive the rockbolt, and a second wedge member with a complemental wedge surface. The second wedge member is connected to the rockbolt. The wedge surfaces of the first and second wedge members are arranged in slideways relationship with one another, and a spring acts between the members to cause relative slideways movement between the wedge surfaces. In combination, the wedge members form a body which is rectangular in a cross-section taken transversely to the axis of the rockbolt.

Abstract: The present invention relates to a device for the assembly and disassembly of a first pair (12) and of a second part (10), the first part (12) being securely attached to a first member (14) co-operating with a second member (22) retaining the second part (10) on the first (12). According to the invention, the first member (14) is a stud formed of a shank (16) and of a head (18) and the second member (22) is composed of a sleeve (24) in which slides a piston (26).

Abstract: Variable compressor vanes are locked into a selected position after testing. The usual sync ring and vane arms are removed. A vane lock joins adjacent vanes locking them into the selected position.

Abstract: A fastener, to be inserted into a receiving hole in a panel, has a cylindrical body with a longitudinal axis and a straight bore through the body with an axis that is inclined relative to the axis of the body. In another type of fastener, the fastener has a body formed of cylinders that are joined end-to-end and have axes that are inclined relative to each other. One cylinder is a right cylinder. A straight bore passes through both cylinders such that the bore axis is aligned with the right cylinder. Generally, the axis of the straight bore is perpendicular to the panel surfaces and the axis of the inclined cylinder is inclined at between 5.degree. and 60.degree. relative to the bore axis. The axis of the receiving hole is aligned with the axis of the inclined cylinder. When the fastener is inserted into the panel, the inclination of the receiving hole cooperates with the fastener body to prevent rotation and provide an axial holding force when a fastener bolt is threaded into the fastener.

Abstract: A locking bolt apparatus includes a bolt having a fastening end with a circumferential channel around the fastening end, a bolt lock assembly including a cylindrical sleeve for receiving the fastening end of the bolt, the cylindrical sleeve having a pin slot angled with respect to the cylindrical sleeve longitudinal axis, a locking pin in the slot oriented perpendicular to the longitudinal axis of the cylindrical sleeve and having two ends extending beyond the slot, the pin positioned to laterally enter the circumferential channel, and an annular release member, slidably encircling the cylindrical sleeve, for engaging the two ends of the pin and pushing the pin out of the slot and out of the channel to release the bolt.

Abstract: An E-shaped retainer ring comprising an inner circumference that engages with a retainer ring accommodating groove formed around the circumference of a shaft; an opening through which a shaft passes when the retainer ring is mounted on and removed from the shaft; and protruding front end portions formed on each side of the opening at the outer circumference of the ring; whereby the E-shaped retainer ring is removed from the shaft by passing a tool against the protruding end portions of the ring, and the distance between the outer sides of the front end portions is set almost equal to the outer diameter of the retainer ring. A tool for fitting and removing the above E-shaped retainer ring is also provided.

Abstract: A snap-action fastening device comprises an operative unit to be fastened to a switchboard and a flange unit having seats receiving fins of a member containing control and signalling units and adapted to be snapped on and fastened to an elongated stem of the operative unit. The flange unit has a rotatable lever having a central bore provided on a surface thereof with inwardly protruding teeth engageable in elongated slots formed in an end portion of the stem and retained in recesses extending transversely of the slots.

Abstract: Means for preventing the common rotation of one of a bolt and a nut in the case where the other of said bolt and said nut is rotated by means of a tool, such as spanner, to screw up a plurality of members by the use of the bolt and the nut is provided.

Abstract: A cam action clamp for use against a fixed clamping surface comprising a threaded shaft extending outwardly from the fixed clamping surface and a movable clamping member having a channel therethrough to allow the clamping member to be mounted on the threaded shaft for slidable movement along the shaft. A thrust plate is affixed to the movable clamping member adjacent the channel. A mounting block is threadably mounted on the threaded shaft and a clamping handle is pivotally mounted to the mounting block. The handle is formed as a cam member that abuts the thrust plate. Pivoting the handle causes the cam member to engage the thrust plate to slidably advance the movable clamping member along the threaded shaft toward the fixed clamping surface in order to clamp an article between the surfaces. The mounting block can be rotated along the threaded shaft to vary the distance between the clamping surfaces.

Abstract: A securing device is provided which comprises a fastening element and a tightening member, the device being suitable for fastening furniture panels together. Features are incorporated in the fastening element which improve the quality of the joint which can be achieved between two panels. These include forming helically extending ribs on the leading end of the fastening element which enable it to be pushed into a bore in a member to be fastened, while turning it through a small angle to provide some resistance to axial forces tending to pull the fastening element out. Other features are fins which act to stop the insertion of the fastening element at a predetermined depth and which engage with the second panel to inhibit rotation of the fastening element, the fins being arranged in such a way that they disappear into the second panel allowing the two panels to come into full contact with one another when the joint is secured.