Patent ID: 6076575
Filing Date: 2000-06-20
Classification: B27F

Abstract:
A jig for making a joint in a workpiece, comprising:a first support structure to support the workpiece and a template in proper position relative to each other, the first support structure having a lateral axis parallel to the direction a template will be repositioned between cuts parallel to the end of a workpiece, and parallel to an elongated toothed rack;a template incorporating at least one guiding surface to guide a router in the cutting of joints, the template being repositionable a number of times along the lateral axis to make a plurality of cuts defining a row of joint elements across the end of the workpiece;a keeping member to keep said template from moving relative to the workpiece; repositioning members to reposition said template from one cutting position to another in a direction parallel to the row of joint elements;an elongated toothed rack coaxial with and fixed to said first support structure, the toothed rack having a plurality of equally spaced teeth having a pitch and being indexing points to establish the proper lateral position of said template relative to the workpiece;an indexing member having two ends, one end being attached to the template and the other end being seated relative to a tooth of said rack to accurately index the lateral position of said template relative to the workpiece in one of a plurality of acceptable cutting positions, the acceptable cutting positions being separated by distances that are exact integral multiples of the tooth pitch; andan adjusting member to adjust the transverse position of guiding surfaces of said template relative to the workpiece in order to slightly alter the joint, whereby tightness of the joint is optimized.