Abstract: The disclosed fixture has a main clamping piece defining several differently sized smooth bores, the locations and sizes of which are selected to receive and hold different central mounting mechanisms of incompatible cutting tools, with the intended cutting edge on each cutting tool then spaced beyond and clear of the clamping piece. A stop is provided in accurate vertical registry with each bore, allowing the fixture to be secured to a grinder bed and located accurately relative to the grinding wheel, before the cutting tool is mounted thereon and any sharpening begins. Before being tightened down, the cutting tool can be rotated selectively in the fixture to accurately set where the grinding wheel will sharpen the cutting edge, and a second clamping piece then secures the cutting tool rigidly in the fixture. Special mounting pins cooperate respectively with the different cutting tool central mounting mechanisms to hold the different cutting tools relative to its proper fixture bore.

Abstract: The disclosed multi-use clamp consists of a unitary body having an elongated pointed shank and a hook cantilevered off of the shank opposite the pointed end. The hook has first and second concavely curved portions located outwardly adjacent the shank. These curved portions having curvatures corresponding to the outside surface of two differently sized conventional conduits, and the centers of these respective curvatures are spaced from the shank a distance corresponding to the curvature itself. A commercial version of the clamp would have the curvature of the inner curved portion correspond to a 1/2" size conduit, and would have the curvature of the outer curved portion correspond to a 3/4" size conduit. The clamp can thus be used with either size conduit, being driven into and be rigidly secured to a support structure, with the hook overlying the conduit for holding it relative to the support structure.

Abstract: A heavy duty staple especially suitable for heavy duty outdoor uses such as in securing ground wires to wooden utility poles, and made from material of generally square cross section having along corners of the staple prongs longitudinal series of coined V-shaped interlock notches defined by substantially triangularly arrow-shaped surfaces with their apecis at the prong corners. Resistance to withdrawal of the staple from a wooden member into which driven is increased by lateral bulging projection of material coined from the notches.

Abstract: A heavy duty fastener is provided especially suitable for outdoor uses such as in heavy timber including utility poles. For example, it may be in the form of a staple for securing a telephone ground wire cover to a pole. It has along each leg or prong a series of longitudinally spaced interlock notches for engagement therein of the severed bent-in edges of growth rings of the timber member in which the fastener is secured, the notches having shoulders facing generally toward and interlocked with the severed edges which thoroughly resist withdrawal of the fastener from the wood member.Tearing of the fiber structure of the wood during driving in of the fastener is minimized by having all laterally projecting surfaces along the prongs smoothly rounded, including shoulder lips and lateral side shoulder projections generally aligned with the notches.Manufacture of the fastener by coining of the interlock notches is facilitated.