1982-03-02
1984-03-13
Henry, Jon W.
350589, 73334, G02B 500, G02B 700, G01F 2302
Patent
active
044363753
ABSTRACT:
A sight glass assembly comprising a housing structure having a circular opening therethrough, the opening having an enlarged section, a lens disposed across the opening and having a peripheral portion received within the enlarged section of the housing structure opening, a sealed ring assembly disposed in the enlarged section of the housing structure opening, the sealing ring assembly comprising a rigid compression ring and a resilient packing member mounted on the compression ring, the packing member having an L-shaped cross-sectional configuration including a wall portion mounted on an inner side of the compression ring and engaging the periphery of the lens and a flange portion mounted on the compression ring and engaging the housing structure, and means mounted on the housing structure and engageable with the compression ring for urging the compression ring against the packing member, causing the packing member to expand radially, thereby effecting a seal between the housing structure and the periphery of the lens and placing the lens in radial compression.
REFERENCES:
patent: 3345872 (1967-10-01), Meginnis
patent: 3746431 (1973-07-01), Meginnis
patent: 3951301 (1976-04-01), Meginnis
Henry Jon W.
Pressure Products Company
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