Laser plumb device

Details Laser plumb device Laser plumb device

1995-10-16

1997-07-08

Will, Thomas B.

Geometrical instruments

Straight-line light ray type

Vertical angle

33286, 33299, 33DIG21, G01C 1500

Patent

active

056448503

ABSTRACT:
A laser plumb device (10) comprising a facility (12) for emitting two narrow light beams (A) and (B) in which the light beams (A) and (B) are opposite and aligned to each other. A structure (14) is for supporting the light emitting facility (12) in a vertical position. When the supporting structure (14) is placed over a layout mark (16) upon a floor (18) under a ceiling (20) in a building (22), the light emitting facility (12) will cast the first narrow light beam (A) onto the layout mark (16) upon the floor (18) and will simultaneously cast the second narrow light beam (B) onto the ceiling (20) to transfer the layout mark (16) from the floor (18) to the ceiling (20).

REFERENCES:
patent: 3471234 (1969-10-01), Studebaker
patent: 3635565 (1972-01-01), Colsom
patent: 3911588 (1975-10-01), Ohneda
patent: 4106207 (1978-08-01), Boyett et al.
patent: 4878296 (1989-11-01), Londino, Jr.
patent: 5012585 (1991-05-01), DiMaggio
patent: 5163229 (1992-11-01), Cantone
patent: 5218770 (1993-06-01), Toga
patent: 5367779 (1994-11-01), Leo
patent: 5501018 (1996-03-01), Porter

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