Patent ID: 7676950

Claim:
An adjustable carpenters square, the carpenters square comprised of a tape holder and a commercial off-the-shelf (COTS) tape cassette, the COTS tape cassette possessing a flexible metal tape, the tape holder possessing an upper side and an under side, the tape holder an elongated rectangular piece of material, the tape holder upper side possessing a tape cassette holder to which the COTS tape cassette is attached removably, the tape holder upper side also possessing a break angle in its length such that the COTS tape cassette is held at an angle to the remainder of the tape holder upper side, the tape holder upper side also possessing a press-down tape stop at the end of the tape holder away from the tape cassette holder, the press down tape stop a device that when pressed by the thumb intercepts the flexible metal tape and stops it from moving, the tape holder under side possessing a straight edge, the tape holder under side possessing two adjustable arms, each arm attached at the end of the tape holder underside away from the tape cassette holder, each adjustable arm attached rotatably to the tape holder underside by means of a cylindrical pivot point, the two cylindrical pivot points placed on either side of the straight edge, the cylindrical pivot holes each possessing a plurality of ratchet angles punched through their material, the positioning of the ratchet angles at regular angular displacements around the cylindrical pivot hole, each cylindrical pivot hole containing removable within it a cylindrical pivot ratchet, the cylindrical pivot ratchets possessing a plurality of flexible bearings and flexible bearing guide holes, each flexible bearing placed within the cylindrical pivot ratchet such that the flexible bearing will push through a flexible bearing guide holes when the adjustable arm is positioned at a one of the preselected ratchet angles within the cylindrical pivot hole, the flexible bearing filling each ratchet angle in turn as the adjustable arm is rotated.