Automatic plumb laser beam generator

Details Automatic plumb laser beam generator Automatic plumb laser beam generator

1998-06-23

1999-06-29

Font, Frank G.

Optics: measuring and testing

Angle measuring or angular axial alignment

Apex of angle at observing or detecting station

356250, G01C 110, G01C 912

Patent

active

059175877

ABSTRACT:
A plumb laser beam generator includes an internal self-leveling feature to assure the projection of a substantially plumb beam despite tilt of the instrument's housing. Tilt compensation is achieved in preferred embodiments using the angular deflection of a spring due to gravity along with the compensating angular magnification of a telescope which moves pendulously by support on the spring. A laser diode of the instrument is mounted fixedly in the housing, and the telescope resides above the diode and collimating optics, the telescope either hanging by a spring or supported at its base by a spring. The pendulous telescope preferably is motion-damped and includes motion limiting and shock absorbing devices to prevent damage due to sudden acceleration or dropping.

REFERENCES:
patent: 3936197 (1976-02-01), Aidrink et al.
patent: 4221483 (1980-09-01), Rando
patent: 4912851 (1990-04-01), Rando
patent: 5459932 (1995-10-01), Rando
patent: 5524352 (1996-06-01), Rando
patent: 5541727 (1996-07-01), Rando
patent: 5619802 (1997-04-01), Rando
patent: 5825555 (1998-10-01), Oono et al.

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