Portable laser vertical collimator and plumb line indicator

Details Portable laser vertical collimator and plumb line indicator Portable laser vertical collimator and plumb line indicator

1981-12-07

1984-05-15

McGraw, Vincent P.

Optics: measuring and testing

Fiducial instruments

Artificial reference

356149, G01C 914

Patent

active

044485280

ABSTRACT:
Apparatus for transferring a floor marking to a location on an overhead in direct true vertical relationship to the floor marking comprising a laser device generating a pair of beams directionally separated 180 degrees, gimbal mounted to swing free within a wind shielding housing, the housing having collapsible tripod legs with caging arms on each leg extending into the housing to engage and hold said laser in a centralized position when said legs are collapsed for transport of said apparatus.

REFERENCES:
patent: 3771876 (1973-11-01), Ljungdahl et al.
patent: 3858984 (1975-01-01), Denton et al.
patent: 4183667 (1980-01-01), Denton

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