1982-03-02
1984-08-28
Henry, Jon W.
73334, G02B 500, G01F 2302
Patent
active
044680953
ABSTRACT:
A sight glass assembly comprising a first housing section having an opening therethrough, mountable on a vessel wall having an opening therethrough so that the first housing section opening registers with the vessel wall opening, the opening of the first housing section having an enlarged section, a second housing section cooperable with the first housing section, having an opening therethrough registered with the opening in the first housing section, the opening in the second housing section having an enlarged section disposed in opposed relation to the enlarged section of the opening in the first housing section, a lens disposed across the openings having the periphery thereof disposed between the housing sections and received within the enlarged sections of the openings in the housing sections, a sealing ring assembly disposed in the enlarged sections of the housing section openings, included a rigid compression ring and a resilient packing member, the compression ring being engageable with one of the housing sections, the packing member having an L-shaped cross-sectional configuration including an annular wall portion mounted on an inner side of the compression ring and engaging the periphery of the lens and a flange portion mounted on an end of the compression ring and engaging the other of the housing sections, and means for urging the housing sections together so that the compression ring will be forced against the packing member, causing it to expand laterally, thereby effecting a seal between the periphery of the lens and the housing sections and placing the lens in radial compression.
REFERENCES:
patent: 3941460 (1976-03-01), Meginnis
patent: 3942881 (1976-03-01), Meginnis
patent: 4182179 (1980-01-01), Meginnis
patent: 4372652 (1983-02-01), Pontefract
Henry Jon W.
Pressure Products Company, Inc.
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