Abstract: The apparatus for anchoring a traction member comprises an anchoring body which is a molded piece with a transverse cross section small compared to its longitudinal cross section and an insertable guiding rod couplable detachably with the anchoring body and alignable longitudinally with the anchoring body. An attaching piece for the traction member is mounted laterally on the anchoring body with spacing from both ends of it. To provide an easier removal of an anchoring apparatus erroneously inserted in the ground the anchoring body is provided with a cutter like tapered front end and simultaneously on a rear end a sectioning for nonrotatable engagement with the insertable guiding rod. The attaching piece for the traction member is mounted between the center of gravity of the anchoring body and the cutter like tapered front end and comprises a shackle, a ring loop or a chain link engaged pivotally in a passage through the anchoring body.

Abstract: An apparatus for anchoring a traction member comprising an anchoring element which is a molded piece with a transverse cross section small compared to the longitudinal cross section thereof and an insertable guiding rod couplable detachably with the anchoring element and alignable longitudinally with it. An attaching piece for the traction member is mounted laterally on the anchoring element with spacing from both ends of it. An anchoring body of the anchoring element is provided with a cutter like tapered front end and on a rear end has a sectioning for nonrotatable engagement with the insertable guiding rod. The attaching piece for the traction member is mounted between the center of gravity of the anchoring body and the front end of the anchoring body. At and/or near the attaching piece for the traction member an arm is mounted so as to be limitedly pivotable the rear end of which is associated with the rear end of the anchoring body.

Abstract: A plasterboard, boat, flooring underlayment or like ridged nail is provided with a taper of its sawtooth profile toward the point of the nail. The crests of the ridges can lie along one imaginary cone converging toward the point while the roots of the ridges lie along another imaginary cone equidistant from the first or converging toward the crest cone in the direction of the point. Steep-pitch helical flutes can be provided along the sawtooth portion especially when the nail is to be driven in hard materials.

Abstract: The clamping device for an elongate, continuous traction member, particularly for a rope, cable, cord, belt, strand or the like, comprises an oblong body composed of an at least nearly rigid material and at least two clamping pieces, advantageously hook-, eye- or eyelet bolts, guided transversely in the oblong body and spaced from each other which are movable by a wing nut and which each contain a receiving portion, advantageously a hook, eye or eyelet, for engaging and holding the traction member which is positionable against abutting surfaces of the oblong body. The oblong body is a massive block provided at least on opposing ends thereof with rounded surfaces and in which guiding surfaces, abutting surfaces for the clamping pieces and supporting and/or bearing surfaces for the wing nuts engaged with the clamping pieces are formed.

Abstract: Disclosed is a wood screw with a head separated from a threaded extremity by an unthreaded shank whose diameter is less than the outer diameter and only slightly larger than the root diameter of the thread. A cylindrical or tapering neck inserted between the head and the shank has a diameter, at least in the immediate vicinity of the head, equaling the outer thread diameter. The threaded extremity terminates in a pyramidal tip with three or four sides, at least one edge of the pyramid being notched by an extension of the thread groove to act as a spur in cutting a bore ahead of the advancing screw thread. The turns of the thread, in one embodiment, have leading flanks merging into or overhung by rounded ridges enabling the screw to be hammered into a substrate of natural wood or particle-board composition.