Electronic compass

Details Electronic compass Electronic compass

1979-08-20

1981-02-17

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

33355R, 33361, G01C 1704

Patent

active

042506263

ABSTRACT:
Set out herein is an electronic compass suitable for public use having a conventional pin supported magnetic needle which is placed over a set of magneto diodes or Hall devices arranged in quadrature. The magneto diodes or Hall devices are thus exposed to the highly enhanced magnetic field around the needle and will thus provide a direct readout, in electrical form, of the deviation from magnetic North. In this manner a relatively conventional arrangement of a magnetic needle may be utilized to provide the necessary signal source for electronic pick-off with the same accuracy obtained by a conventionally suspended arrangement practiced in the past.

REFERENCES:
patent: 2286406 (1942-06-01), Green et al.
patent: 2662208 (1953-12-01), Wells
patent: 2755562 (1956-07-01), Hurlburt
patent: 3959889 (1976-06-01), Thomas

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