Abstract: A cap having an antitheft lock for a fastening member and comprising a cap body (1) covering a polygonal engaging portion of the fastening member (A) and having a cavity (2) formed in the front end face of a side portion thereof, a bore (3) extending from the cavity (2) rearward therethrough and an inward slanting guide face (4) formed in the inner periphery of the cap body (1) and extending from the bore (3) toward the rear end of the cap body, a pressure contact piece (7) having an outward slanting face (6) positioned inwardly of and opposed to the inward slanting face (4) for preventing the cap from slipping off, and a screw (5) inserted through the cavity (2) into the bore (3) and having a rear end screwed into the contact piece (7) and a head (5a) bearing on the bore edge portion.

Abstract: A fastener assembly including a bolt having an enlarged head at one end and a nose at the other end. The bolt is threaded for threaded engagement to the stud of a receptacle assembly. The head of the bolt has a countersunk opening configured to a tool for rotating the same. This opening includes a spring biased releasable plug which is moved downwardly upon insertion of the tool to permit rotation thereof, then returns to a position flush with the exterior of the head of the bolt surrounding the opening. An adjusting screw is threaded into a mating threaded hole in the plug for adjusting the same so that the upper surface of the plug is flush with the upper surface of the bolt head.

Abstract: A choke valve safety device to prevent unthreading of the choke bonnet nut until internal pressure has been vented, comprising a U-shaped bracket that fits over a tool-engaging portion of the nut, and a bracket support securable to the choke body only in the correct position.

Abstract: Tamper proof service bolts for sealing boxcars, automobile hoods, gates and other enclosures, as well as gas and electric meters, railroad switches and the like. In a first preferred embodiment the tamper proof service bolts are characterized by special head service bolts, each having a base member and a collar secured to the base member by means of a connecting bolt having a specialized head recess for receiving a corresponding tool which is required for removing the connecting bolt and the collar from the base member. In another preferred embodiment of the invention retainer clip service bolts are provided, wherein a retainer clip is adapted to mount on each base member and in the collar when the collar is fitted over the base member, to secure the collar on the base member.

Abstract: Improvements are disclosed to conventional brake slack adjuster mechanisms of the type which are employed upon heavy equipment such as dump trucks and the like which mechanisms are anchored to the axle of the truck and utilize a worm drive and spline arrangement within an adjuster housing to drive a spline shaft interconnected to the brake assembly to adjust the brakes. The worm drive is driven by a worm drive adjusting bolt which has an adjusting bolt head which interreacts with a spring loaded adjusting bolt head socket lock which may be forced out of disenagagement with the adjusting bolt head to permit adjusting of the brakes by the worm-spline drive arrangement and which adjusting bolt head socket lock upon release engages the adjusting bolt head to lock the adjusting bolt head against misadjustment.

Abstract: An apparatus for first aligning by trial and error, and then mounting or fastening a subsystem of an electrostatographic copier or printer such that the subsystem thereafter can be removed, serviced, and then remounted or reinstalled in precise alignment without further need of such initial trial and error aligning thereof. The apparatus include an aligning device for initially aligning by marking an aligned position through a first alignment and screw mounting aperture in the mounting portion of the subsystem, and for forming a laterally sealed cavity with such mounting portion. The device has front and back sides, a screw or bolt mounting apertures therethrough, a backside recess, and adhesive introduction perforations therein.

Abstract: This invention is directed to a coupling or a connector for securing a load-bearing support to a head of a bolt, particularly in a mining operation in which roof bolts have been used for shoring the roof of the mine. The coupling or connector is secured to a bolt head by which machinery may be lifted and or moved. A bolt may be secured in a wall to which the coupling or connector could be secured to the head for moving machinery from one place to another.

Abstract: In order to be able to use an anti-skid device, particularly for vehicle wheels with pneumatic tires when driven on ice and snow, having a fixing disk, which can be attached to the wheel rim and which remains thereon even when the anti-skid device is not in use, and a supporting disk attachable to the fixing disk by a retaining ring and having a plurality of anti-skid arms engaging over the tire tread without great technical expenditure on a large number of vehicles, whose rims have different hole circles and pitches for the rim screws, the fixing disk with a shaped-on hub carries on its side remote from the supporting disk an adaptor disk, which is connected to the fixing disk by screw connections and which has a plurality of radially directed elongated holes in identical and/or several spacings or pitches.

Abstract: A device for preventing loosening of a prismatic member, such as a fixing nut, screw head or bolt, and particularly a lock nut of a wheel of an automobile vehicle, includes a cap adapted to cover the head of the prismatic member. The cap includes a transverse bottom and a cylindrical skirt in one piece with the bottom and a mechanism means for locking the prismatic member received in the cap. The locking mechanism for the prismatic member in the cap are constituted, in combination, by a ramp inclined with respect to the longitudinal axis of the cap, placed inside the skirt, a shim placed between the ramp and the lateral face of the prismatic member sliding both on the ramp and on the lateral face of the prismatic member, and an arrangement for longitudinally displacing the shim in contact with the ramp and the lateral face in order to exert a transverse effort for locking the prismatic member.

Abstract: A decorative and protective cap for mounting on a threaded stud to conceal and protect a locknut threadably mounted therein, the cap including a shell having a cylindrical portion for providing a close fit with the outer surface of the locknut, a hexagonal wrench-receiving portion on the shell, and a plastic insert retained within the shell. The plastic insert has a portion with depressions therein for receiving internal lugs of the shell to thereby permanently mount the insert within the shell. An annular longitudinally slotted portion of the insert has an internal thread for mating engagement with the thread of the stud.

Abstract: A weld stud having a cylindrical section permitting engagement by a stud welding gun, joined by a shoulder on to a threaded shank covered up to the shoulder by a cap nut made of plastics, wherein the cylinder section changes through a chamfer into a shoulder and the cap nut is provided with a resilient lip, which stretches to cover the chamfer when the cap nut is brought into contact with the shoulder. The threaded shank may have a ridge close to the shoulder which engages in a corresponding annular recess inside the cap nut. The cap nut may have a coaxial, preferably conical, projection at its end opposite the lip.

Abstract: An improved nuclear reactor wherein the bolted connections between the baffle plates and baffle former and the baffle former and the core barrel are provided with a noval locking device that prevents loosening of the bolted connections. The locking device to prevent loosening of bolted connections where a threaded bolt is used to secure two components together uses a threaded lock nut over the bolt head, cooperative with a threaded wall in a recess in a component. The lock nut and wall of the recess have threads opposite the threads of the bolt. Deformable sections are formed in the base of the lock nut to engage an unsymmetrical cavity in the head of the bolt. Turning of the bolt in a direction that would tend to loosen the connection causes tightening of the lock nut. The wall of the lock nut may be threadedly engaged with the wall of the recess or the lock nut wall may have slits formed thereon which enable deformation of wall portions to engage the threaded wall of the recess.

Abstract: A locknut having a body portion with an outer surface and first and second ends, a thread extending inwardly into the body portion from the first end, a depression in the second end, an inwardly tapered lobed curvilinear surface defining the periphery of the depression for receiving a mating key, and an external thread extending from the second end onto the outer surface for receiving the internally threaded surface of a sleeve mounted on a key for attaching the key to the locknut. The locknut as described above including a rotatable sleeve mounted thereon with a shroud located radially outwardly of the external thread. A locknut as described above wherein the outer surface extending from the first end is frustoconical and terminates at an annular shoulder which is located radially outwardly of the external thread.

Abstract: A trim cover clip comprising a hollow tube made of a plastic substance, containing in the wall of the hollow tube at least one slit having the shape of three sides of a rectangle and thereby enclosing therein an engaging piece possessing a free end, and having the inner wall of the engaging piece corrugated to form teeth capable of engaging with the thread on the bolt being passed through the inner hole of the hollow tube is improved by having the engaging piece formed aslant inwardly enough for the free end thereof to thrust deeply into the inner wall of the hollow tube.

Abstract: An attachment clip for attachment of splash guards on automotive vehicles is provided for use in conjunction with a sheet-form element of a vehicle wheel well. This attachment clip comprises a metal clip having a Z-shaped configuration, formed with two outer legs cooperating with a center interconnecting bar to form a clamping element with respect to one outer leg and the interconnecting bar to securely engage with a sheet-form support element. The other outer leg has a T-shaped slot with a channel through which a fastener element passes to secure the clip to an article such as an automobile splash guard. The fastener element includes a bolt having a head and a shank and securing means. The interconnecting bar has punched from it a spring tongue which projects towards the channel of the T-shaped slot to retain the fastener element in a relatively fixed position against the one leg of the clip and to enter into a screwdriver slot in the bolt head to prevent rotation.

Abstract: A water dam in the form of a cup is secured around the head of a fastener to confine water that leaks pass the fastener to a localized area.