Laser plumbing device

Details Laser plumbing device Laser plumbing device

1994-06-27

1996-04-23

Fulton, Christopher W.

Geometrical instruments

Straight-line light ray type

Vertical angle

33227, 33286, 33378, 33396, G01C 1502

Patent

active

055092098

ABSTRACT:
In a projected light plumb device which is buoyantly supported within a fluid-filled container on a float platform which is horizontally supported by the fluid, an improvement wherein the float platform is inclined upwardly from its outer diameter to its inner diameter on its lower surface which rests in the fluid to allow any developed air bubbles on the lower surface of the float platform to escape. Improvements also include a locator plate to align the container. The locator plant has apertures to view and align a locator mark on the surface on which the device is placed with indicia on the locator plate.

REFERENCES:
patent: 3505739 (1970-04-01), Abrams
patent: 3874088 (1975-04-01), Shaffer, Jr.
patent: 4949467 (1990-08-01), Oman et al.
patent: 5184406 (1993-02-01), Swierski

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