Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Patent
1981-08-13
1984-01-17
Haroian, Harry N.
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
33363K, G01C 1726
Patent
active
044257163
ABSTRACT:
A remote-reading compass in which a compass assembly is buoyantly supported within a housing to accommodate a large range of tilt. Buoyancy is provided by a float surrounding the compass assembly and a liquid within the housing chamber. A pivot pin extends from either side of the float along a first normally horizontal axis to permit rotation of the float and compass assembly about the axis. The ends of the pivot pin ride in a circumferentially extending track which is disposed on the interior of the housing. The track permits rotation of the compass assembly and float about a second normally horizontal axis orthogonal to the first axis of the pivot pin. In this manner, the compass assembly is permitted to remain in a normally horizontal orientation during movement of the compass housing without need of gimbals, and rotation about a normally vertical axis is prevented. In addition, the track and the pivot pin together maintain a desired spacing between the float and the interior of the housing. The compass assembly typically includes either a flux gate or a coded compass disc and magnet rotatable about a normally vertical axis, and a light source and light sensors for providing a coded output signal representing compass heading.
REFERENCES:
patent: 1294710 (1919-02-01), Roland
patent: 1957897 (1934-05-01), Micek
patent: 2506353 (1950-05-01), Finneran et al.
patent: 3888016 (1975-06-01), Fowler
patent: 4027398 (1977-06-01), Fowler et al.
Haroian Harry N.
The Laitram Corporation
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