Picture frame making tool

Abstract

A picture frame making tool or jig comprises two frame rail clamps interconnected by a scale bar in adjustably spaced relationship. The frame rail clamps have jaws with shoulders adapted to be received in the picture receiving groove of the frame rail, whereby the rail is clamped between its outer edge and at the inside edge of its picture receiving groove. The scale is graduated to read in units of length related to the distance between the corners of the picture receiving groove, whereby the user can saw miter cuts at the ends of the rail, and the cut rail will be of the correct length to receive the picture in its picture receiving groove. The clamps further comprise corner clamps for clamping two miter cut frame rails together in angular relationship for assembly. One of the jaws of each corner clamp is offset inwardly from the centerline of the saw cut by a distance compensating for the saw kerf, thus enabling the mitered ends of both angularly related frame rails to be butted against one another and fastened together without further rail adjustment to accommodate for the kerf. The frame rail clamps are releasably connected to a table by table clamps having pivotal connections therebetween, whereby the frame rail clamps may be swung to nailing position.