Patent ID: 7347233

Claim:
A jig for cutting box joints on a table saw, comprising: a table saw, having cutting blades, a pair of guide grooves defined in the upper surface of the table saw and disposed on either side of the cutting blades, and a pair of guide bars each slidably disposed within one of the guide grooves; guide bar clamps each with a guide bar segment contiguously formed with a spacer segment, each guide bar segment joined to one of the guide bars; a spacer having a front surface connected to both of the guide bar clamps, the front surface defining a notch, a top surface defining a groove, a back surface defining a sink disposed about the notch, a bottom surface, a right end and a left end; a blade guard having ears and defining a channel, the channel extending coaxially with the notch, the ears being fastened to the spacer; a spacer strip defining fastener apertures and spacer apertures, fasteners extending through the fastener apertures joining the spacer strip to the spacer, the spacer apertures having a gap therebetween, the gaps being equidistant in length; a zero tolerance insert having fasteners and a blade slot, the zero tolerance insert being receive within the sink and joined to the spacer, the blade slot being size and adapted to receive the blades therethrough; a board clamp having a front portion, a back portion and clamp fasteners, the front portion having a spacer segment contiguously connected to a board segment, an engagement pin being joined to the spacer segment, the engagement pin engaging one of the spacer apertures of the spacer strip, the board segment defining apertures, the back portion having a board segment defining apertures, the fasteners extending through the apertures of the board segments of the front and back portions; at least one pair of boards disposed within the board clamp, the board having grooves and projections defined in at least one end thereof; and means for offsetting pairs of boards such that the grooves and projections on a pair of boards is cuttable offset from a corresponding pair.