Hand bearing compass

Details Hand bearing compass Hand bearing compass

1988-02-26

1990-01-23

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

With magnetic compass

33361, G01C 1712, G01C 1730

Patent

active

048949221

ABSTRACT:
A hand bearing compass comprises an electronic direction finding sensor fixed in a flat rectangular compass body. An actuating button causes the sensor to measure a magnetic bearing in dependence on the orientation of the compass body in a horizontal plane; measured bearings are stored in microprocessor memories for subsequent sequential recall to a display. To align the sensor horizontally in use the compass has longitudinal sights for visual alignment with a mark and a flat upper surface of the compass body for alignment with the horizon to facilitate levelling. Actuator and longitudinal sights are laterally spaced to avoid obscuring the latter, and arranged symmetrically about a median plane of the body so that use is possible in either hand.

REFERENCES:
patent: 2955357 (1960-10-01), Vegelhardt
patent: 3248793 (1966-05-01), Anderson
patent: 4656750 (1987-04-01), Pitt
patent: 4668100 (1987-05-01), Murakami

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