Abstract: A unitary, permanently-locked, strain-relief bushing and a tool for applying same in an aperture in a support panel. The bushing comprises two generally concave, complementary portions interconnected by a flexible web. Each complementary portion comprises a shank segment having an especially configured shouldered end and a grip segment frangibly secured thereto axially extending from the shouldered end.The tool for applying the bushing into the aperture comprises an open-sided barrel, a plunger within the barrel and an especially configured mounting recess at the front end of the barrel. The mounting recess firmly receives the shank shouldered ends when the complementary portions are folded, concave portion to concave portion permitting an electric conductor or the like to be received in the bore thus defined by the complementary portions.

Abstract: An electrical toggle switch assembly adapted for mounting from the rear of a bulkhead or support panel includes a bushing which pivotally supports an actuating lever and is inserted into a mounting hole in the panel. Secured on the outer peripheral surface of the bushing is a retainer made from an oriented fiber material including a plurality of short, relatively stiff, normally straight fibers which slant downwardly at an acute angle, preferably less than 45.degree., and normally extend outwardly from the bushing beyond the inner periphery of the panel mounting hole. As the bushing is pressed through the mounting hole, the fibers are deflected inwardly and a portion thereafter spring back to their normally extended position and grip the front of the panel in the area surrounding the mounting hole to hold the switch assembly on the panel.

Abstract: A grommet is disclosed, which grommet comprises a female member of a U-shaped end face containing a U groove for accommodating a stretched cord and provided at one extremity of said U groove with an elevated wall rising from the bottom of said groove and at the other extremity with a projecting wall extending inwardly from one side wall and a male member adapted to fit the U groove of the female member for fast engagement therewith, whereby the engagement of the male and female members gives rise to a laterally elongate opening on the side incorporating said elevated wall and a longitudinally elongate opening on the side incorporating the projecting wall. When the male and female members are brought into mutual engagement with a cord interposed therebetween, the cord is fastened in position in its twisted state within the grommet.

Abstract: Disclosed is a grommet made of a synthetic resin, which comprises two members adapted to be coupled into embracing engagement, said members each provided at the opposed end portions thereof with a pair of inclined protrusions of which the directions of inclined edges, when observed in front elevation, cross each other. When said two members of the grommet are coupled with each other, therefore, said inclined protrusions closely approach each other at both said end portions so as to firmly grip a cord passed between the two members and said close mutual approach of the inclined protrusions causes the cord to twist itself between one end portion and the other end portion of the coupled members because of said crossed relationship of the directions of the inclined edges of said protrusions. This twist in the cord serves the purpose of preventing the cord from freely moving in the direction of its length.

Abstract: A one-piece strain relief bushing includes independent means for grasping the wall surrounding an aperture and open and closeable means for grasping a cord or cable so as to relieve strain while being able to release the cord or cable without having to detach the strain relief bushing from its position in the aperture.

Abstract: An electric resistance heating element for use in appliances such as dishwashers includes a mounting grommet having a resilient body portion sized to be forcibly urged through an aperture formed in a bulkhead of the appliance. A neck portion formed integral with the resilient body portion has an axial extent substantially equal to the thickness of the bulkhead receiving the grommet and a width to substantially fill the aperture. A head portion formed integral with the neck portion overlies the aperture on the side opposite that of the resilient body portion. A passage is formed axially through the body portion, neck portion and head portion to receive the end of a heating element therethrough. A flared tubular ferrule or conical tubular ferrule is provided at the end of the body portion to receive sealing cement for permanently securing the mounting grommet to the heating element inserted therethrough.

Abstract: A closure or bushing member for openings in electrical boxes, conduit ends and the like is formed as an integral unit of a thermoplastic synthetic organic polymeric resin and includes a disc or annular shaped head and a coaxial hollow cylindrical shank of lesser diameter. Extending from opposite sides of the distal end of the shank are a pair of opposite radially projecting arms, which terminate in wing members of greater width than the radial arms and which have conically surfaced outer faces flaring rearwardly outwardly. A peripheral recess is formed in the rear outer face of each wing to provide a rearwardly facing shoulder for resiliently engaging the inside border of the opening to which the closure member is applied to retain the closure member therein.

Abstract: A one-piece molded grommet for routing a cable inserted therethrough and to protect the cable from bending, cutting and foot traffic. A cavernous tab or foot in the form of a split sleeve portion disposed in a first plane is attached to a vertically oriented barrel portion through which an inserted cable is elevated from the cavity of the tab to a second plane generally parallel to the first. A flange member or pad is attached to the barrel portion at the second plane and includes a bore at an angle to the cable's introduction to the cavernous tab. A vertically oriented slit is provided in the barrel and the flange member to facilitate installation and removal of the cable to the grommet. The slit is off-center relative to the bore in order to provide a saddle of protective material for the cable therein should pressure be applied to the top of the grommet.

Abstract: End caps for the primary winding of an instrument transformer have a radius to relieve the electrical stress at the sharp edges of the primary. The end caps are provided with recesses to receive the primary leads and also have other recesses for locating the primary in a mold for encapsulating the instrument transformer. Lugs or tongues are provided at the inner edge of the end caps to support the winding during molding. Prior to molding, a conducting tape is attached to one primary lead and wound around the end caps.

Abstract: Disclosed is a plastic device for clampingly holding a length of electric cord which device comprises two "L"-shaped halves hinge-connected to each other, each having an L-shaped groove. In use, a length of electric cord is curved in the form of an L, and is fitted in the groove of one half, and then the other half is rotated around the hinge-connection to overlie said half in which the cord has been fitted. The two grooves constitute a complete round hole in which the electric cord is contained in a clamped condition.With this arrangement the clamp holder according to this invention assures a positive grip of the electric cord against any "pull-out" force applied to the electric cord.

Abstract: The invention relates to a strain relief bushing for electrical cables or the like, which comprises integrally and flexibly interconnected male and female body portions which, when assembled around a cable, and the assembly is pressed into a mounting aperture in a panel, releasably snap lock in an operative position in the aperture to insulate and anchor the cable with respect to the panel. The female body portion is provided with a substantially rigid rearward extension provided with secondary releasable snap-lock means which retain the bushing positively locked to the panel, when the bushing is not in its operative position, and a cable is being assembled to or dissassembled from the bushing.