Geometrical instruments – Straight-line light ray type
Patent
1991-05-17
1992-09-01
Haroian, Harry N.
Geometrical instruments
Straight-line light ray type
33DIG1, 33 2701, 353 50, G01B 1126, G02B 714, G03B 2128
Patent
active
051427885
ABSTRACT:
A laser compass projects a laser beam along an axis. A mirror is rotated within a rotation plane perpendicular to the axis. The mirror is pivotally adjusted relative to the axis of the laser beam to reflect the laser beam at an angle ".alpha.". As the mirror rotates, the reflected laser beam is swept through an inverted cone having an apex at the point of intersection of the laser beam with the mirror, and having a base on whatever projection surface happens to be located above the laser compass (typically, a ceiling). The base of the cone defines a perfect circle on the projection surface. The radius "r" of the circle is governed by the distance "d" between the projection surface and the intersection of the laser beam with the mirror; and, by the angle .alpha.. The mirror pivot angle .alpha. required to yield a circle of desired radius "r" is given by the formula:
REFERENCES:
patent: 3767299 (1973-10-01), Fisher
patent: 3951527 (1976-04-01), Blanz
patent: 4196461 (1980-04-01), Geary
patent: 4693567 (1987-09-01), Ozaki
patent: 4799103 (1989-01-01), Muckerheide
patent: 4814800 (1989-03-01), Lavinsky et al.
patent: 4852265 (1989-08-01), Rando et al.
patent: 4861189 (1989-08-01), Fukukawa et al.
patent: 4912851 (1990-04-01), Rando et al.
LandOfFree
Laser compass does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser compass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser compass will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-759467