Geometrical instruments – Straight-line light ray type – Level
Patent
1997-07-17
1999-10-05
Bennett, G. Bradley
Geometrical instruments
Straight-line light ray type
Level
G01C 500
Patent
active
059605510
ABSTRACT:
A rotary laser irradiating system, comprising a laser projector for performing rotary irradiation of a laser beam, a collimating telescope having a collimation axis in a projecting direction of the laser beam, and a rotation base where the collimating telescope can be rotated around an axial line running perpendicularly to the collimation axis and can be fixed at a predetermined position, whereby the collimating telescope is used for the setting of a tilting direction, and the collimating telescope is rotated when necessary, and collimation can be performed at least in two directions.
REFERENCES:
patent: 786093 (1905-03-01), Bostrom
patent: 1552318 (1925-09-01), Lane
patent: 4691444 (1987-09-01), Capps
patent: 5485266 (1996-01-01), Hirano et al.
Hirano Satoshi
Nishi Masayuki
Bennett G. Bradley
Kabushiki Kaisha Topcon
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