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US 4,244,253 AGranted
Cutting guide attachment for power tools
AssigneeHoudaille Industries, Inc.
InventorRichard J. Flanigan
Life of this patent
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AssigneeHoudaille Industries, Inc.
InventorRichard J. Flanigan
Estimating the term…
An attachment for cutting machine tools, such as band saws, spindle-shapers, sanders and the like, controlling the feed path of the workpiece to the cutting tool to form desired workpiece contours, such as circles, arcs and the like, has a grooved track bar easily locked on and removed from the machine bed or table carrying a slide in the groove which has a workpiece centering pivot pin projecting therefrom. A workpiece is either directly pivoted on the pin or secured to a templet pivoted on the pin and is rotated about its pivot support against the cutting tool. The slide may be locked in the groove at a selected distance from the tool, may be pushed against a stop at a selected position in the groove or may be shifted by a cam to control the feed path of the workpiece for forming desired contours. Circles of selected diameters, elipses of selected minor and major radii, heart shapes, four leaf clover shapes and the like are easily developed.
A cutting guide attachment for work table equipped cutting machine tools controlling the feed path of the workpiece to the cutting tool to form desired workpiece contours which comprises, an elongated track bar, bolts for demountably securing one end of the track bar on top of the machine tool work table positioning the bar adjacent one side of the cutting tool to extend laterally from the cutting edge of the tool, a slide carried by said track bar, a workpiece centering means on said slide adapted to guide the workpiece against the cutting tool along an arcuate path with a radius controlled by the distance of said centering means from the cutting tool, means controlling the position of said slide in said track bar to maintain the desired feed path, and a workpiece supporting block mounted on top of said work table adjacent the opposite side of the cutting tool presenting a work support surface at the same level as the workpiece centered on the centering means.
A circle cutting guide for band saws having a work table with a band saw blade having a driving run through said table which comprises, an elongated track bar having a dovetail groove along the length thereof, workpiece support faces on said bar on opposite sides of said groove, a workpiece support member having a top support face to cooperate with the faces of said track bar, means securing said work support member on a band saw table adjacent the inner side face of the upright cutting run of the saw blade, means securing the track bar on the band saw table on the opposite side of the band saw blade, means on the table aligning the track bar to extend normal to and spaced from the outer face of the band saw blade, a dovetail slide block riding in said dovetail groove of the track bar, a centering pin projecting from said slide block above the support faces of the track bar, a set screw threaded through said slide block having an end for engaging the bottom of the dovetail groove of said track bar to wedge lock the sides of the slide block against the side walls of the dovetail groove, said top faces of said track bar and said support member lying in the same horizontal plane to carry a workpiece flatwise above the table, and said centering pin providing an axis of rotation for the workpiece to control the feed path of the workpiece to the saw blade thereby controlling the contour of the saw cut.
Dependencies are inferred from the claim text.