Precision optical square instrument

Details Precision optical square instrument Precision optical square instrument

1988-06-30

1990-03-20

Shoap, Allan N.

Geometrical instruments

Straight-line light ray type

Multisight line

33276, 33286, 33 19, 356399, 356146, G01C 1512

Patent

active

049089480

ABSTRACT:
A precision optical square instrument for accurately determining lines and planes respectively perpendicular to reference lines and planes comprising, a substantially hollow housing containing first and second reflectors arranged at different vertical positions for viewing first and second marker positions outside the housing which are substantially at right angles to each other. The images of the two marker positions are projected onto a third reflector which is viewed by a user, such that the user can determine when the two marker positions are located perpendicularly, by the alignment of the images viewed in the third reflector.

REFERENCES:
patent: 974007 (1910-10-01), Wolcott
patent: 1019668 (1912-03-01), Lewis
patent: 1025911 (1912-05-01), Gasser
patent: 1696508 (1928-12-01), Thorburn
patent: 3167864 (1965-02-01), Lange
patent: 3355979 (1967-12-01), Wirtanen
patent: 3446560 (1969-05-01), Brasier
patent: 3521364 (1970-07-01), Metcalfe
patent: 3528747 (1970-09-01), Walsh
patent: 4281928 (1981-08-01), Brunson
patent: 4378638 (1983-04-01), Harder

Affiliated with

Also associated with

Rating

Precision optical square instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Precision optical square instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precision optical square instrument will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-783491