| US 7,497,019 B2 | ||
| Laser reference device | ||
| Derek J. Nash, Huntersville, N.C. (US); and John Smith, Denver, N.C. (US) | ||
| Assigned to Irwin Industrial Tool Company, Huntersville, N.C. (US) | ||
| Filed on Aug. 02, 2006, as Appl. No. 11/497,991. | ||
| Claims priority of provisional application 60/705660, filed on Aug. 04, 2005. | ||
| Prior Publication US 2007/0028470 A1, Feb. 08, 2007 | ||
| Int. Cl. G01C 15/00 (2006.01); G01C 15/12 (2006.01) | ||
| U.S. Cl. 33—286 [33/283; 33/291; 33/DIG. 21] | 19 Claims |
| 1. A laser reference device comprising:
a housing including a reference surface adapted to be mounted against a vertical surface;
means for mounting the housing to said vertical surface;
a chassis mounted for rotation relative to the housing;
a collimated light source on the chassis;
an inclination sensor that senses the angular orientation of the chassis; and
a leveling mechanism including a motor for rotating the chassis from a first position to one of a plurality of second positions
in response to the angular orientation sensed by the inclination sensor.
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