Abstract: A cutting mat comprises: a baseboard defined with an assembling hole and at least one notch on a side of the assembling hole, a positioning member detachably disposed in the assembling hole, and a cutting board. The positioning member includes a circular body and at least one positioning protrusion formed on a side of the circular body and located in a corresponding position to the notch of the baseboard. The cutting board is formed at the bottom thereof with a circular recess for engaging the circular body of the positioning member, so that the cutting board is rotatably superposed on the baseboard.

Abstract: An expandable mechanical stop is provided for positioning a workpiece during woodworking or other operations. The mechanical stop includes a positioning body which is adjustably attached to a track, the track having a vertical face that abuts an edge of the workpiece during operation. A stop arm is connected to the positioning body and includes a rear face that is substantially adjacent to the vertical face of the track. Anti-biasing means are provided to prevent the workpiece from dislodging the stop arm by sliding between the stop arm and the track. In one configuration, tabs are provided on the rear face and are received by grooves on the vertical face to serve as the anti-biasing means. In another configuration, grooves are provided on the rear face and receive tabs disposed on the vertical face.

Abstract: Miter apparatus for use with a cutting tool having a table top containing an alignment groove. The miter apparatus includes a guide bar adapted to slidably fit in the alignment groove, a head assembly pivotally secured to the guide bar, and a telescopic fence assembly secured to the head assembly. The fence assembly is adjustable in length and includes an inner rail telescopically received within an outer rail, each rail being provided with a retractable workpiece stop which is pivotally mounted on its rail so as to be movable from an operative to a retracted position. A clamping mechanism may be provided for securing a workpiece in position against the guide bar.

Abstract: An adjustable carpenter square for use in determining the relative angles between two predetermined points defined by a pair of longitudinal extensions pivotally attached together at one end.

Abstract: An improved miter gauge having means for establishing the angle of a workpiece relative to a tool such as a table saw, with increased resolution and accuracy. The miter gauge includes a guide bar adapted to slidingly engage a groove in the tool. A reference frame having a flat surface against which the workpiece is held, is pivotally mounted on the guide bar. A rotatably mounted angle index dial, graduated to show the miter angle at which the gauge is set, is turned by two intermeshed gears as the reference frame is pivoted about its mount on the guide bar. The intermeshed gears are operative to rotate the angle index dial through a greater angle than the miter angle by a six-to-one ratio to increase the resolution with which the miter angle is set. For example, a 15.degree. change in the miter angle results in a 90.degree. rotation of the angle index dial. Two embodiments show alternative ways to attach one of the gears and angle index dial to the guide bar and reference frame.

Abstract: In an arrangement in angle rulers for improving the fixture of an angularly adjustable blade (10) of said rulers to the stock (11) thereof in selected angular positions relative thereto, the stock (11) comprises a rectangular hollow section having a lateral opening (17), the blade (10) being arranged to be partly surrounded by the hollow profile of the stock. A spring-loaded (20), displaceable peg (19) is arranged to extend through at least one (12) of the mutually opposing walls (12,13) of the stock, and through the blade (10). One surface of the blade exhibits grooves or promontories (27) arranged to co-act with corresponding grooves or promontories (26) in the inwardly facing surface of the wall (12), whereat both grooves (27) and promontories (26) concentrically encircle the peg (19), around which peg the blade (10) is arranged to pivot.