Waterproof and fog resistant gauge

Details Waterproof and fog resistant gauge Waterproof and fog resistant gauge

1995-06-07

1996-06-25

Raevis, Robert

Measuring and testing

Instrument casing

G01D 1124

Patent

active

055289347

ABSTRACT:
A waterproof and fog resistant gauge (10) includes a housing (12) forming a chamber (14) with a base (18) and opposing open end (16). The open-end (16) is enclosed by a bezel (60) compressing a pair of lenses (50, 52) spaced by a gasket (46) against and to the housing (12). The spaced lenses (50, 52) provides a "dead air" space between the lenses (50, 52) preventing air from entering or exiting. The housing (12) also includes an aperture (70) covered by an anaerobic filter (72) which allows the chamber (14) to breath while preventing water and other contaminants from entering the gauge (10).

REFERENCES:
patent: 1925999 (1933-09-01), De Giers
patent: 2476909 (1949-07-01), Ratz
patent: 2701969 (1955-02-01), Meredith
patent: 3530723 (1970-09-01), Hogue et al.
patent: 4628731 (1986-12-01), Copeland

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