Three-dimensional laser levelling and angle-calibrating instrume

Details Three-dimensional laser levelling and angle-calibrating instrume Three-dimensional laser levelling and angle-calibrating instrume

1997-08-26

1999-11-16

Fulton, Christopher W.

Geometrical instruments

Straight-line light ray type

33286, 33DIG1, 33DIG21, G01C 1512, G01B 1126

Patent

active

059835109

ABSTRACT:
A three-dimensional laser levelling and angle-calibrating instrument includes: a stand; a magnetically-attractive laser level having a horizontal bottom attractable on the stand, a vertical wall perpendicular to the horizontal bottom and a first laser illuminator mounted on the laser level for projecting a horizontal laser ray for levelling purpose; and a magnetically-attractive laser angle calibrator having a second laser illuminator and attracted on the vertical wall of the laser level for projecting a vertical laser light line for checking a verticality.

REFERENCES:
patent: 4138826 (1979-02-01), Inge
patent: 4593475 (1986-06-01), Mayes
patent: 4656752 (1987-04-01), Wu
patent: 5394616 (1995-03-01), Claxton
patent: 5505000 (1996-04-01), Cooke
patent: 5531031 (1996-07-01), Green
patent: 5575073 (1996-11-01), Von Wedemayer
patent: 5864956 (1999-02-01), Dong

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