Direction-finding devices

Details Direction-finding devices Direction-finding devices

1985-08-26

1987-05-26

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

33327, 33355R, G01C 1708

Patent

active

046674144

ABSTRACT:
A housing defines a chamber having a spherical inside surface, and a spherical float is supported within the chamber by a liquid so that the outside surface of the float is equidistantly spaced from the top and bottom of the inside surface of the chamber. The float incorporates a permanent magnet defining diametrically-opposed opposite poles which serve to orient the float with respect to the earth's magnetic field. The liquid is magnetizable, and the float is laterally centered within the chamber by magnetic interaction between the magnet poles and the magnetizable liquid. A differential fluxgate sensing head serves to sense the relative orientation of the housing and the float in a horizontal plane and to supply an electrical output signal indicative of that orientation. A highly accurate direction-finding device is thereby produced at modest cost.

REFERENCES:
patent: 2437132 (1948-03-01), Sinks
patent: 2755562 (1956-07-01), Hurlburt
patent: 3084443 (1963-04-01), Kaatz et al.
patent: 3262080 (1966-07-01), Hubbard
patent: 3286358 (1966-11-01), Smokowski
patent: 4441375 (1984-04-01), Minohara et al.

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