Weakly magnetic compass

Details Weakly magnetic compass Weakly magnetic compass

1987-05-11

1988-10-04

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

G01C 1730

Patent

active

047747668

ABSTRACT:
A compass, by which under-water divers can find their direction, comprise two crossed flux-gate type magnetometers, the measurements of which are processed by logic signals to light up a set of light-emitting diodes which indicate the right direction and, if necessary, the direction and approximate value of the offset of the compass. By using non-magnetic materials and low-consumption electronics, the disturbance of the local field is considerably reduced as compared with a conventional compass. This enables divers to avoid triggering magnetically fired mines.

REFERENCES:
patent: 3355705 (1967-11-01), Koerner
patent: 3802088 (1974-04-01), Barrett et al.
patent: 3853089 (1974-12-01), Howard
patent: 3888201 (1975-06-01), Zuvela
patent: 4037328 (1977-07-01), Kuehn et al.
patent: 4104803 (1978-08-01), Hoeppel
patent: 4255866 (1981-03-01), Sears
patent: 4503621 (1985-03-01), Fowler

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