Abstract: A cutting guide for use during cutting of work pieces, and especially flexible materials such as foam rubber and the like to insure precise, accurate arcs or curved paths in the work pieces. The guide includes a rotatable plate having an adjustable pivot assembly providing an axis or center of rotation with respect to a base or other support and upstanding, adjustably spaced, support walls which position the work piece for cutting. The base may be a portable plate or the table of a cutting apparatus such as a band saw or the like such that, in either case, the work piece may be supported adjacent a cutting tool such as a band saw blade or the like. The rotatable plate is rotated to move the work piece toward the cutting tool in a precise, controlled arc while the plate and support walls prevent the work piece from moving out of position. Apparatus for remote positioning of the pivot axis may be included.

Abstract: Apparatus for positioning the center points of circular arcs for accurately and precisely cutting such arcs in work pieces with band saws and the like. The device includes a base secured to the work support table of the saw and extending away from the saw blade. An arm is mounted at the end of the base, remote from the blade, and is spaced above the base. Also included are means with the arm for movably mounting a trammel point which engages and holds the center of the arc to be cut either on the work piece itself or on a holder therefor to determine the radius of the arc, as well as manual and power means for rotating the work piece about the trammel point.

Abstract: Apparatus for positioning the center points of circular arcs for accurately and precisely cutting such arcs in work pieces with band saws and the like. The device includes a base secured to the work support table of the saw and extending away from the saw blade. An arm is mounted at the end of the base, remote from the blade, and is spaced above the base. Also included are means with the arm for movably mounting a trammel point which engages and holds the center of the arc to be cut either on the work piece itself or on a holder therefor to determine the radius of the arc, as well as manual and power means for rotating the work piece about the trammel point.