Attitude indicator for divers

Details Attitude indicator for divers Attitude indicator for divers

1978-03-17

1979-10-30

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33333, G01C 906

Patent

active

041723279

ABSTRACT:
A device for enabling a diver to determine his relationship to the true horizon in deep and murky waters or when physiological sensations are of little value is described. An attitude sensor, incorporating a series of mercury switches, usually at the back of the diver's helmet or head, is coupled to a series of light emitting diodes equally spaced around the periphery of the face plate of the diving mask or helmet so as to simulate the natural observation that the half space above the horizon is illuminated while the half space below the horizon is not.

REFERENCES:
patent: 1375278 (1921-04-01), Clayton
patent: 1409808 (1922-03-01), Wood
patent: 1907402 (1933-05-01), Fedor
patent: 2910782 (1959-11-01), Krantz
patent: 3210859 (1965-10-01), Fisk et al.
patent: 3475957 (1969-11-01), Hiszpanski

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