US Patent 7690126 Adjustable carpenter's measuring tool

A measuring tool for use particularly in carpentry combines the features of a square, a level and a bevel tool into a single device. The measuring tool includes a handle which supports a slide rule at one end and a pitch slide which can be adjustably positioned within the handle through the advancement and retraction of a thumb bolt into the handle. The thumb bolt may be advanced by either turning the thumb bolt and/or advancing the thumb bolt against a spring biased ratcheting mechanism. The thumb bolt may be retracted either by turning and/or by disengagement of the spring biased ratcheting mechanism.