Abstract: Electrical devices of outdoor electrical receptacles are protected from weather conditions. A protective cover and a waterproofing gasket are pivotally mounted on a plate for movement along a circular path between a fully closed position, in which the gasket prevents water from reaching the device, and a fully open position, in which access to the electrical device is permitted. A leaf spring having a planar movable portion constantly and affirmatively urges the cover to the closed position. In order to ensure a reliable and automatic return of the cover to the closed position, an anti-over-the-center stop prevents a leading end of the cover, which engages the planar spring portion at a contact zone, from moving the latter beyond an imaginary line which extends from the center of curvature of the circular path in a radial direction towards, and at a right angle to, the plane of the spring portion. The cover is easily mounted by snap-type action to the plate under spring tension.

Abstract: An end fitting for a flexible metallic conduit comprises a tubular body having an external thread to enable the body to be screwed into an end of a conduit, a tubular sleeve having an external thread to enable the end fitting to be threadedly mounted on a support, and a rotary tubular collar threadedly mounted on a stationary projection of one-piece with the body. The collar has an inner circumferential tapered surface which bounds a wedge-shaped annular space with the externally threaded end of the body. The conduit is received in wedged, moisture-resistant engagement in the space. A stressed O-ring seal between the sleeve and the stationary projection provides another moisture-resistant seal.

Abstract: An elongated rectilinear tool for formation of a threaded hole in ductile metal by the coining or flowing of the metal. The tool typically is employed to form through threaded holes in a piece of ductile metal, and features a working end having a boring tip or drill point and a spade section having a flat shank with grooves in its lateral edges. The spade section holds the drill point and extends back a short distance from the working end. The diameter of the tool then enlarges slightly at a small inclined section which is followed by a longer coining tap section. The coining (flowing) of metal forms a thread on the previously smooth wall of the drilled hole, with peaks or crests, and roots. The lateral grooving of the spade section tracks, i.e. fits, into the fully formed threading as the present tool is screwed out.