Abstract: A locking device includes a main housing with one or more plunger sets therein for gripping a cable. The plunger sets each have two or more pieces, for example plunger pieces, that are partially within a bore in the main housing. The plunger halves or pieces have teeth on inner surfaces, for gripping a cable that runs through the bore, between the plunger halves or pieces. A spring within the bore biases the plunger set to one side of the bore, a location in which the plunger halves or pieces are pressed together, causing the inner surface teeth to bite into the cable to secure the cable. A nut is threadedly connected to a threaded outer surface of the plunger halves, outside of the bore, to allow the plunger set to be moved within the bore, to allow disengagement of the cable from the teeth.

Abstract: A clamp includes first and second parts, each of the parts having a circular central section and a pair of straight extensions extending away from the circular central section in opposite directions. In the first part the holes are closed holes, while in the second part the holes are open holes, connected by slots to an upper edge of the part. Bolts may be pre-located through the closed holes, with nuts threaded onto the bolts, but not tightened. The pre-placed bolts may be received through the slots and into the open holes of the second part. The nuts may then be tightened against the second part to clamp the circular central sections on opposite sides of a circular object, such as a vertical pipe run, between the parts. According to a variant, the bolts are permanently secured to the first part so as to prevent rotation of the bolts.

Abstract: A cable support includes a metal bracket having a bottom, and a stem and a tip extending from opposite sides of the bottom. The bracket may have in general a U shape (or a squared-off J shape), with a cable-receiving area between the stem and the tip. The support has one or more rollers between the bottom and the cable-receiving area, extending from the stem to the tip. The cable-receiving area has open sides at opposite ends, allowing the cable to be pulled through the cable-receiving area while resting on the one or more rollers. The support may be connected to other cable supports through a variety of mechanical mechanisms.

Abstract: A J-hook cable support includes a semicircular saddle, a stem at one side of the saddle, and a tip at the other side of the saddle. The stem includes protruding tabs able to engage snap-on brackets in order to engage structural parts, or to couple multiple cable supports together. The stem may have two pairs of tabs at different heights along the stem away from the saddle. The tabs may be bent pieces of the metal of the stem, bent toward the back of the stem, away from the cable-receiving area defined by the saddle. The snap-on brackets may include one or more pairs of notches for engaging the tabs of one or more of the cable supports. A wire retainer may be used to close off the cable-receiving area, with the wire coupled to both the tip and the stem.

Abstract: A ground conductor clamp has a sheet metal clamp body with overlapped portions. The clamp body may be stamped from sheet metal. The overlapped portions have aligned circular holes in them for receiving a threaded insert nut inserted into them. The insert nut is spin riveted to attach it to the overlapped portions of the clamp body. A flange of the insert nut has a flat face that engages the clamp body to prevent rotation of the insert nut. The overlapped portion includes an inner bent tab that strengthens the sheet metal clamp body. The clamp also includes a threaded fastener, such as a bolt, that is threaded into the insert nut to engage a conductive lead and a ground conductor, such as a ground rod or ground electrode.

Abstract: A bolt has a pointed end with cutting edges. The cutting edges may have knurls (grooves) or ridges, and may have a spiral arrangement. The bolt may have a convex end, such as a cone end or a curved end. A plurality of bolts may be used as part of a reinforcing bar splice that also includes a sleeve. The bolts engage threaded holes of the sleeves. As the bolts are tightened, they bore into the receiving bar ends, securing the bar ends within the sleeve. Cutting edges on the bolts aid in boring the ends of the bolts into the reinforcing bar ends. Using cutting edges on the bolt ends allows deeper penetration of the bolts into the reinforcing bar ends, without increasing the amount of torque used.

Abstract: A cable support has a saddle, and a hinged part that can be engaged with a slot in the cable support to close an opening for placing cables into the saddle. The saddle has a curved inner surface, bulging at middle of the surface and curving away toward the longitudinal edges. The hinged part has a resilient finger tab that releasably fits into slot in the support to close the opening. An insert may be placed in a cable-receiving area of the support to divide the area into plural cable-receiving pockets. The insert may include hooks that engage an insert guide rail of the cable support.