Automatic optical plumbing instrument

Details Automatic optical plumbing instrument Automatic optical plumbing instrument

1998-03-18

2000-08-29

Gutierrez, Diego

Geometrical instruments

Straight-line light ray type

Level

33227, 33291, G01C 500

Patent

active

061089192

ABSTRACT:
An automatic optical plumbing instrument includes: an objective telescopically mounted at a front portion of a telescopic housing adjacent to an object to be observed, an ocular telescopically mounted at a rear portion of the housing adjacent to an observer's eye, and a transparent plumbing protractor defining a plumbing line thereon and mounted in the housing between the objective and the ocular, whereby upon entrance of a vertical line (or plane) of the object into the instrument to form an image therein, a verticality of the vertical line (or plane) of the object can be checked whether the vertical line is aligned with the plumbing line marked on the protractor, thereby providing a plumbing instrument for calibrating a verticality of the object.

REFERENCES:
patent: 2601643 (1952-06-01), Sulger
patent: 2839834 (1958-06-01), Hardy
patent: 4082466 (1978-04-01), Underberg
patent: 4656752 (1987-04-01), Wu
patent: 4907882 (1990-03-01), Waibel et al.

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