Automatic plumb and level tool

Details Automatic plumb and level tool Automatic plumb and level tool

G - Physics

01

B

G01B 11/26 (2006.01) G01B 3/00 (2006.01) G01C 15/00 (2006.01)

Patent

CA 2071968

2071968 9207290 PCTABS00012 An automatic plumb, level and pointing tool uses a visible laser diode (42) to project a beam in any of three different modes through a beam exit window (30). The tool, approximately the size and shape of a tape measure, can be placed on one edge (14) to project a tilt-compensated vertical beam. Placed on another edge (16) 90· rotated, the tool projects through the same exit window a tilt-compensated horizontal beam. When laid on either of its larger flat sides (24), the tilt compensation becomes inoperative and the tool projects a beam which is fixed relative to the housing. In a preferred embodiment, separate pendulous or cantilevered mirrors (52) and (60) are used for vertical and horizontal tilt correction and are selected by the influence of gravity as the tool is laid on one edge or the other. In further described embodiments, two separate laser diodes (124a, 124b) may be used, or the laser tool may be integrated with other tools such as a tape measure or a squaring tool. A preferred cantilever beam tilt compensator achieves a wide range of accurate compensation through substantial tilt of the device in the horizontal mode.

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