Abstract: A corner connector connects two sections to one another, which sections are at right angles to one another and have C-shaped attaching portions. The sections have two section legs and two webs projecting inwards two at a time from the section legs. The corner connector consists of two angle plates, two wedge rails, four screws and associated parallelogram nuts. The plates each have two grooves, which accommodate the webs in a form-fitting manner, and wedge surfaces on the opposite sides. The nuts grip behind the webs. The plates are spread by the wedge rails clamped against the nuts by the screws. High bending and tensile strength of the joint is achieved by this design.

Abstract: A two piece fastener made up of a hex-on-hex nut and a diamond shaped steel plate with a countersink portion having a hex shaped hole to receive the reduced across flats portion of the hex-on-hex nut. The bottom of the nut sits above the thin metal bearing surface against which the steel plate is being clamped.

Abstract: A structural fastener for blind fixing to a member with an elongate slot comprising a stud within an elongate head which allows the head to be inserted through the slot, the stud then being rotated to move the head out of register with the slot preventing withdrawal of the stud. The shank of the stud has a threaded portion in which a nut is mounted, and further includes a region between the head and the threaded portion which is non-circular and permits limited rotation of the stud after the head has been inserted through the slot, and thereafter engages the sides of the slot to prevent further rotation of the stud in the same direction, thus allowing tightening of the nut to clamp one or more items between the head and the nut.

Abstract: A T-nut is disclosed for accurately affixing work beds to the base of a machine. The preferred nut comprises a generally flat head; a shank that is integral with and extends upwardly from the head; and a pair of furrows --one on each side of the shank, at its juncture with the head. The furrows are designed to straddle the burrs sometimes found in the T-slots of a machine base, so that the nut will sit flush within the slot, rather than be canted.

Abstract: An easily movable display mounting system including a mounting cup (12) secured to a slot wall by a T-shaped fastener 26.

Abstract: A fitting, for fastening with interengaged inner and outer threaded members to a channel-shaped framing member, comprises a tab projecting into the channel to abut the inner threaded member to assure properly rotated assembly of that threaded member and to prevent improper rotation if the threaded members are loosened.

Abstract: A thermally insulated framing system for storefronts and the like includes inner and outer framing elements connected by a combination twist-in/snap-on insulating clip. The base of the clip is twist-lockable into a locking channel on one frame member, and compressible ridges on the lower face of the base wedge the base securely within the locking channel. A pair of legs at the other end of the clip are snap-fittable onto a locking flange formed on the other frame member. By providing a plurality of pairs of retaining grooves on the locking flange, the clip can be locked into any one of a plurality of locking positions relative to the locking flange, enabling the framing system to accommodate glazing panels of different thicknesses.

Abstract: An assembly is disclosed having a simple, standard fastener secured to sheet material such as sheet metal. A support strap is integrally formed in an offset relationship with the sheet material, and opposite sides of the fastener are deformed to interlockingly engage the remainder of the sheet material. A method and apparatus are also disclosed for securing the fastener to the sheet material in substantially one operation, including alternate manual and automatic means for feeding fasteners to such apparatus.

Abstract: An elongated strut which has a pair of inwardly depending flanges formed to receive and secure fittings inserted into the continuous slot of the strut anywhere along the length of the slot. The flanges define an interior cavity to receive and hold strut fittings and accessories.

Abstract: A file cabinet including a pair of opposed side panels, a back panel, front railing and top panel. The side panels are formed at their front and rear extremities with inwardly turned borders which are then turned back on themselves to form joint flanges co-extensive with, but spaced from, the bodies of the respective panels. The back panel is formed on its laterally opposite sides with forwardly turned facing flanges. The top panel is formed on its opposite sides and back side with down turned borders which then turn inwardly to form facing flanges with overlie corresponding joint flanges formed by horizontally inturned portions of the side and back panel. The joint flanges are formed with longitudinally extending raised ribs which nest within recessed grooves formed in the facing flanges to thus provide indexing between the joint and facing flanges.

Abstract: A file cover has paper-penetrating prongs which are secured in the assembly by engagement with a mounting channel and at least one of which is slidable along the channel whereby the spacing between them is infinitesimally adjustable. A retainer for each prong is preferably an apertured block borne by a parallel channel member, at least one of the blocks being slidably movable in the parallel channel member.

Abstract: A nut retainer for use with a structural member having a nut entrance channel defined between a pair of opposed shoulders or flanges of some predetermined thickness and a nut receiving channel disposed beneath the shoulders. The nut retainer has a generally frusto-conical body constructed from a resiliently deformable polymeric material with the body smaller diameter end fixedly secured to a rectangular nut upper face in a surrounding relationship with a threaded fastener receiving opening. The body larger diameter end is spaced from the nut upper face by some predetermined distance and has a diameter greater than the width of the structural member entrance channel. The retainer body is conformed such that the body exterior side wall will engage the structural member shoulders at areas therealong which are spaced from the nut upper face by a distance which is less than the thickness of the shoulders when the nut is inserted width-wise into the entrance channel.

Abstract: A tamper proof pop rivet assembly comprises a base plate having base plate holes of a greater diameter than that of the barrel of a pop rivet and of a greater diameter than that of the flange of the pop rivet and further comprises a top plate having top plate holes of a greater diameter than that of the traction pin of the pop rivet and of a lesser diameter than that of the barrel of the pop rivet. The top plate is spot welded to the base plate to sandwich the flange of a pop rivet therebetween. The assembly can be used as a replacement for a conventional pop rivet assembly and shows visible signs of any attempt at drilling-out or replacing the pop rivet.

Abstract: A chain-type lock suitable for a door having a locking chain with a locking bar connected to one end thereof and a chain holding member with the other end of the chain fastened thereto. A receiver for securing the locking bar in a locked position is also provided together with threaded fasteners for mounting the receiver and the holding member. Preferably an anchor device is provided for each of the receiver and the holding member in order to hold securely the threaded fasteners in the door, door jamb or the like. Each anchor is adapted for insertion to an opening formed in the door, door jamb or the like.

Abstract: A vehicle body panel structure includes a plastic panel mounted upon an underlying metal substructure. A fastener fixedly attaches one end portion of the plastic panel on the metal structure. A mounting block is slidably mounted on the metal substructure longitudinally spaced from the fastener to define a path of longitudinal movement of the mounting block toward and away from the fixed end portion of the plastic panel. A spring urges the mounting block to a certain longitudinal position and is yieldable to permit movement of the mounting block away from the certain longitudinal position. A fastener attaches the plastic panel to the mounting block so that the plastic panel is effectively supported in a manner enabling longitudinal movement relative to the fixed one end portion to accommodate thermal or hygroscopic growth of the plastic panel.

Abstract: A nut retainer for use with a structural member having a nut entrance channel defined between a pair of opposed shoulders or flanges of some predetermined thickness and a nut receiving channel disposed beneath the shoulders. The nut retainer has a generally frusto-conical body constructed from a resiliently deformable polymeric material with the body smaller diameter end fixedly secured to a rectangular nut upper face in a surrounding relationship with a threaded fastener receiving opening. The body larger diameter end is spaced from the nut upper face by some predetermined distance and has a diameter greater than the width of the structural member entrance channel. The retainer body is conformed such that the body exterior side wall will engage the structural member shoulders at areas therealong which are spaced from the nut upper face by a distance which is less than the thickness of the shoulders when the nut is inserted width-wise into the entrance channel.

Abstract: An easily movable display mounting system including a mounting cup (12) secured to a slot wall by a T-shaped fastener 26.