Abstract: A portable straight edge cutting guide for use with a router, circular saw, sabre saw and similar tools, including a hardwood straight edge and metal angle iron track assembly with adjustable clamps for mounting on a work surface, a removable bearing block assembly having three cam follower bearings which engage with and travel along said angle iron track, and interchangeable adapter plates secured to the bearing block assembly, conforming to the particular tool, which fasten to and travel with the bearing block assembly. A router or other tool is mounted on the appropriate adapter plate; its position relative to the workpiece is aligned by means of adjusting screws on the bearing block assembly, and is then guided along the length of the work piece by the manual movement of the bearing block along the track.

Abstract: This invention relates to a combination of three light compact metallic members adapted for temporary attachment to a sawbuck supported auxiliary length of timber, illustratively a two-by-four, for guiding a carpenter, who is equipped with a hand circular saw, in cutting lumber pieces of uniform cross-section into pieces of precisely controlled length. The three metallic pieces comprise a T-square, which serves as a saw guide, an end stop, and a carrier for supporting work-pieces from the sawbuck supported timber after the work-piece has been reduced to a length which, when in cutting position, is inadequate to derive simultaneous support from both sawbucks. The three metallic pieces are adapted to be united into a compact unit for transportation and/or storage, by a single bolt.

Abstract: An abutment piece adapted to be inserted into a T slot of a machine table and which bears against a lateral surface of the leg section of the T slot by means of an abutment surface and projects beyond the clamping surface of the machine tool table. The abutment piece has a head portion which projects beyond the clamping surface and the width thereof is greater than the slot width of the leg section. The abutment piece has a neck portion received in the T slot and the width of the neck portion is smaller than the slot width. The head portion has on its side facing away from the abutment surface a bearing surface inclined at 45.degree. with respect to the abutment surface and extends toward the neck portion. The bearing surface engages the chamfered outer edge of the lateral surface of the leg section. A wedge element is provided on the neck portion of the abutment piece and is movable parallel to the abutment surface and perpendicularly to the head portion.

Abstract: A positioning arrangement for an element, such as an abutment of an industrial cutting machine, which is mounted on an elongated rail for movement longitudinally thereof, includes a toothed portion rigid with and extending longitudinally of the elongated rail, and an arresting member having serrations which are adapted to matingly engage with the toothed portion in a plurality of positions. The arresting member is mounted on the element for displacement toward and away from the toothed portion, and also for limited movement relative to the element longitudinally of the elongated rail. The arresting member has two opposite lateral surfaces which diverge toward the toothed portion, and a pair of wedge members is provided, each of the wedge members having a wedge surface adapted to contact the lateral surface of the arresting member, the wedge members being mounted on the element for independent displacement toward and away from the toothed portion.

Abstract: A work stop for use with work holding means of the type defining a corridor therealong includes a bar fixed at one end to a work-holding means and a stop arm rotatably fixed to the other end of the bar, such that the stop arm extends into the corridor and bears against a work piece held by the work-holding means.

Abstract: An adjustable self-aligning locator for supporting a plurality of parts in their proper relative position for assembly and/or clamping to a machine bed and the like. The locator includes a support member having a base leg with a cam locking device for engagement with a T-slot on the machine bed and an upright leg with a side extension portion having an arcuate groove therein. An angle member having a matching arcuate shaped protuberance at one end in engagement with the arcuate groove in the upright leg extension provides an adjustable angle working face for contact with the workpiece.

Abstract: A work positioner for radial arm saws adapted to be mounted on the fence of a radial arm saw, and the like, which may be quickly and easily positioned and having a longitudinally movable block mounted therein which may be quickly and easily adjusted to the exact measurement desired, and having novel means for releasably anchoring said device to a fence and releasably anchoring said movable block in position in the device.