Abstract: A method and apparatus for providing temporary secure electric cable access to a terminal of a transformer mounted on a pad; the apparatus includes: 1) at least one riser for supporting an end of the transformer a distance above the pad thereby creating a gap between the pad and the transformer, the distance being sufficient to allow axial passage of the cable through the gap; 2) a barrier shaped for abutting engagement with the transformer and sized to cover the gap; 3) a cable access portal disposed through the barrier; the cable access portal being sized to permit axial passage of the cable; and 4) a barrier lock removably mounted to the barrier for removably securing the barrier to the transformer.

Abstract: A laminated nut includes a conical spring, top disc and a conical spring, bottom disc stacked upon each other defining a laminated stack having a common central bore and an outer wrench engaging surface. A generally cylindrical tension sleeve is located in the central bore. The tension sleeve has an outer wall shaped to substantially conform with the shape of the central bore and an inner wall which is threaded. The tension sleeve has a first end and a second end, the first end of the tension sleeve includes an outwardly extending upper flange and the second end includes an outwardly extending bottom flange, the upper flange and the bottom flange are shaped and dimensioned to retain the top disc and the bottom disc in a stacked relation with the tension sleeve fixedly secured to the laminated stack, such that the conical spring discs and tension sleeve rotate together as a unit.

Abstract: A laminated nut having a plurality of conical spring discs for use with a bolt assembly. Each of the discs is formed with a hex shaped outer periphery and a non-round central bore. The discs are assembled on top of each other forming a laminated stack. A threaded tension sleeve is located in the central bore and has a non-round outer periphery shape corresponding to the shape of the central bore of the discs. The tension sleeve has a threaded inner peripheral wall with the threads sized to fit the bolt assembly. The tension sleeve includes an upper flange to engage and hold the upper portion of the laminated stack and a lower flange to support the laminated stack. Application of a torqueing force to the outer, hex shaped periphery of the discs forces them to deflect and contact the threaded tension sleeve applying force along the length of the bolt assembly in a uniform manner to reduce clearance between the bolt threads and the threads on the nut tension sleeve.

Abstract: A laminated nut includes a conical spring, top disc and a conical spring, bottom disc stacked upon each other defining a laminated stack having a common central bore and an outer wrench engaging surface. A generally cylindrical tension sleeve is located in the central bore. The tension sleeve has an outer wall shaped to substantially conform with the shape of the central bore and an inner wall which is threaded. The tension sleeve has a first end and a second end, the first end of the tension sleeve includes an outwardly extending upper flange and the second end includes an outwardly extending bottom flange, the upper flange and the bottom flange are shaped and dimensioned to retain the top disc and the bottom disc in a stacked relation with the tension sleeve fixedly secured to the laminated stack, such that the conical spring discs and tension sleeve rotate together as a unit.

Abstract: A sheet metal nut made having a scalloped construction including a tubular barrel portion having a plurality of alternate radially inwardly and radially outwardly and axially extending lobes with a thread formed on the inner lobes which thread form is circumferentially interrupted by virtue of the radial displacement between inner and outer lobes and in one form of the invention the barrel portion having a ring with a continuous thread formed at its outer end to facilitate sealing.

Abstract: A laminated nut structure and method of making same with the nut structure having a plurality of coned disc washers having a common threaded bore with the disc washers being held in a cage having fingers gripping the disc washers with at least one of the disc washers being of a deformable material and the others being of a hard material with the threads in the portion of the bore defined by the one disc washer being deformed to provide a prevailing torque characteristic with the thread of an associated bolt portion and with at least one of the cage fingers having an opening in line with the one of the disc washers whereby it can be engaged by a tool to deform the thread at that location.

Abstract: A laminated nut comprising a plurality of conical spring disc washers and a cage for receiving and holding the disc washers in a stacked, aligned relationship to define a central opening threaded to be matably received upon an associated threaded bolt, including protrusion means extending radially, outwardly from the cage to inhibit gripping of the nut by a wrenching tool at one axial end whereby the nut will only be threaded onto the bolt by the wrenching tool beginning with the opposite end of said nut.

Abstract: The method of manufacture and product by process of a laminated nut comprising a plurality of conical spring discs or spring washers and a cage for receiving and holding the spring discs in a stacked, aligned relationship to define a central opening threaded to be matably received upon an associated threaded bolt, with the cage comprising a plurality of fingers nested within slots defined in the flats of the spring discs and including protrusion means at one axial end of the nut cage to preclude gripping of the nut by a wrenching tool at the one axial end.

Abstract: A laminated nut comprising a plurality of conical spring discs or spring washers and a cage for receiving and holding the spring discs in a stacked, aligned relationship to define a central opening threaded to the matably received upon an associated threaded bolt, with the cage comprising a plurality of fingers nested within slots defined in the flats of the spring discs and including protrusion means at one axial end of the nut cage to preclude gripping of the nut by a wrenching tool at the one axial end and including a method of manufacturing the laminated nut.

Abstract: A nut and stud assembly for securing workpieces via threaded engagement of the stud with one of the workpieces and engagement of the nut with another of the workpieces and with the nut preassembled on the stud with the stud having a stop preventing the nut from advancing further on the stud until the stud has reached a preselected position in the one workpiece whereby the nut and stud assembly will function similarly to a headed bolt until the preselected position is attained and thereafter the stop will permit movement of the nut on the stud through such stop and be free running to function similarly to a separate nut and stud combination to a final clamp up of the workpieces.

Abstract: A nut and washer assembly comprising a nut structure and a washer member with the nut structure including a nut member and a cage gripping the nut member and having resilient tabs permitting insertion of the tabs into a washer bore with the tabs having protrusions for engaging a surface on the washer bore whereby the nut structure and washer member are held together as an assembly with the nut member being free spinning relative to the washer member.

Abstract: A laminated nut composed of laminations of tapped conical spring washer segments in which at least one of the segments has a different load-deflection ratio than another segment, thereby to provide for more uniform loading of the threads on the laminated segments, and to provide for self locking of the nut on the bolt by thread interference. A lock mechanism is also provided that automatically and positively locks the nut to the associated bolt, as is required for safety purposes and to avoid legal charges of product liability.

Abstract: A method of manufacturing a threaded fastener of the self-tapping type where the fastener thread is impregnated with a harder substance than the metal from which the fastener is made by utilizing a thread-rolling machine with an impregnating electrode. A method of making the fastener pilot tip end impregnated is also described.

Abstract: Disclosed herein is a fastening element which is susceptible of forming a fastener assembly by engagement with a self-tapping screw. An oblique rib is formed within a bore within a blank, or other structural element, close to the end of the bore. The rib is thus oriented at an angle with respect to the axis of the bore. The result is a rib of substantially eliptical configuration protruding radially inwardly into the bore exclusively from locations along a substantially elliptical closed-loop line upon the cyindrical surface of the bore, the closed-loop line having two turning points of reversal in axial direction component by virtue of the closed-loop line returning into itself. Also disclosed is a void in the rib, and dimensions of the fastener relative to standard externally threaded fasteners which are preferred for high strength and easy driving.

Abstract: The invention described herein relates to a method of making a threaded nut fastener which joins with a threaded male or screw fastener wherein the threads of the nut are partially formed so as to provide for up to 80% thread-to-thread engagement of the screw threads with the nut threads.

Abstract: A method of manufacturing a threaded fastener of the self-tapping type is described, where the fastener has the conventional head, shank, and pilot end. The shank includes a helically wound thread member impregnated with a carbide or other, harder substance than the metal from which the fastener is made. A method of making a thread-cutting fastener having its pilot tip end impregnated, is also described. A method utilizing a thread-rolling machine with a unique impregnating electrode is disclosed. The electrode is shown to engage the fastener selectively during the thread-rolling operation itself.

Abstract: A threaded fastener of the self-tapping type is described having the conventional head, shank, and pilot end. The shank includes a helically wound thread member impregnated with a carbide or other, harder substance than the metal from which the fastener is made. A thread-cutting fastener, having its pilot tip end impregnated is also described. A thread-rolling machine with a unique impregnating electrode is disclosed. The electrode is shown to engage the fastener selectively during the thread-rolling operation itself.