High pressure compass housing

Details High pressure compass housing High pressure compass housing

1975-01-16

1977-01-25

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Magnetic field responsive

73431, G01C 1706

Patent

active

040043487

ABSTRACT:
A compass housing capable of withstanding high external pressure such as encountered in deep submergence applications. The housing includes a pair of hemispherical portions interconnected to form a sealed enclosure and at least one portion being formed of a resilient material capable of expansion and contraction in the presence of varying differential pressure conditions. The housing is completely filled with a damping liquid under pressure to provide an internal pressure higher than atmospheric pressure such that in the presence of higher external pressures, the inner and outer pressures tend to equalize, thereby minimizing the differential pressure on the housing itself.

REFERENCES:
patent: 2350402 (1944-06-01), Krasnow et al.
patent: 2428346 (1947-09-01), White
patent: 3949483 (1976-04-01), White

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