Sight glass assembly

A packing for a sight a glass assembly including a first housing section having an opening therethrough, mountable on a vessel wall, a second housing section having an opening therethrough registrable with said first housing section opening when said first housing section is disposed in assembled condition relative to said second housing section, at least one of said housing section openings having an enlarged section providing a lens seating surface and a packing bearing surface, at least two lenses disposed in at least one of said housing section openings, said lenses having beveled adjoining surfaces, being seated on at least one of said lens seating surfaces and having annular end walls disposed in opposed relation to at least one of said packing seating surfaces, and clamp means for urging said housing sections together, comprising:

• an annular member of compressible material disposable between said annular side walls of said lenses and at least one of said packing bearing surfaces, said member having an inner annular wall engageable with the annular end walls of said lenses, said inner annular wall of said member having a recess registrable with the adjacent beveled surfaces of said lenses when said member is disposed in an assembled position between said lenses and at least one of said packing bearing surfaces, said member occupying a portion of said recess when urged by said clamp means, whereby upon said housing sections being urged together, said member is caused to expand laterally to place said lenses in lateral compression and provide a fluid-tight seal between at least one of said housing sections and at least one of said lenses and said material is prevented from being forced between said lenses to wedge said lenses apart.

A sight glass assembly comprising:

• a first housing section having an opening therethrough, mountable on a vessel wall having an opening therein communicating with a fluid contained therein so that said first housing section opening registers with said vessel wall opening;
• a second housing section having an opening therethrough registrable with said first housing section opening when said first housing section is disposed in an assembled condition relative to said second housing section;
• at least one of said housing section openings having an enlarged section providing a lens seating surface and a packing bearing surface;
• at least two lenses disposed in at least one of said housing section openings, said lenses having beveled adjoining surfaces, being seated on at least one of said lens seating surfaces and having annular end walls disposed in opposed relation to at least one of said packing bearing surfaces;
• a packing disposed between said annular side walls of said lenses and at least one of said packing bearing surfaces, said packing having an inner annular wall engaging the annular side walls of said lenses, said inner annular wall of said packing having a recess registrable with the adjacent beveled surfaces of said lenses when said packing is disposed in an assembled condition between said lenses and at least one of said packing bearing surfaces;
• a compression ring disposed in one of said housing section openings;
• and
• clamp means for urging said compression ring into engagement with said packing, said packing occupying a portion of said recess when urged by said clamp means, whereby said packing is caused to be compressed and expanded laterally to place said lenses in radial compression and provide a fluid tight seal between at least one of said housing sections and at least one of said lenses, and said packing material is prevented from being forced between said lenses to wedge said lenses apart.

A sight glass assembly comprising:

• a housing having an opening therethrough mountable on a vessel wall having an opening therein communicating with a fluid contained therein so that said housing opening registers with said vessel wall opening;
• said housing opening having an enlarged section providing a packing bearing surface;
• a retainer ring disposed in said housing opening;
• at least two lenses disposed between said housing and said retainer ring, said lenses having beveled adjoining surfaces, being seated on said retainer ring and having annular end walls disposed in opposed relation to said packing bearing surface;
• a packing disposed between said annular side walls of said lenses and said packing bearing surface, said packing having an inner annular wall engaging the annular side walls of said lenses, said inner annular wall of said packing having a recess registrable with the adjacent beveled surfaces of said lenses when said packing is disposed in assembled condition between said lenses and said packing bearing surface;
• a compression ring disposed in said enlarged housing opening section;
• and
• clamp means for urging said compression ring into engagement with said packing, said packing occupying a portion of said recess when urged by said clamp means, whereby said packing is caused to be compressed and expanded laterally to place said lenses in radial compression and provide a fluid tight seal between said housing and at least one of said lenses, and said packing material is prevented from being forced between said lenses to wedge said lenses apart.

A sight glass assembly comprising:

• a housing having an opening therethrough, mountable on a vessel wall having an opening therein communicating with a fluid contained therein so that said housing opening registers with said vessel wall opening;
• said housing opening having an enlarged section;
• an insert disposed in said enlarged housing opening section providing a packing bearing surface and having a radially inwardly projecting portion providing a lens seating surface;
• at least two lenses disposed in said housing opening, said lenses having beveled adjoining surfaces, being seated on said lens seating surface and having annular end walls disposed in opposed relation to said insert;
• a packing disposed between said annular side walls of said lenses and said insert, said packing having an inner annular wall engaging the annular side walls of said lenses, said inner annular wall of said packing having a recess registrable with the adjacent beveled surfaces of said lenses when said packing is disposed in assembled condition between said lenses and said insert;
• a compression ring disposed in said enlarged housing opening section;
• and
• clamp means for urging said compression ring into engagement with said packing, said packing occupying a portion of said recess when urged by said clamp means, whereby said packing is caused to be compressed and expanded laterally to place said lenses in radial compression and provide a fluid tight seal between said insert and at least one of said lenses, and said packing material is prevented from being forced between said lenses to wedge said lenses apart.

A sight glass assembly comprising:

• a housing section having an opening therethrough, mountable on a vessel wall having an opening therein communicating with a fluid contained therein so that said housing opening registers with said vessel wall opening;
• said housing opening having an enlarged section providing a packing bearing surface;
• an annular plate mounted on said housing;
• at least two lenses disposed in said housing opening, said lenses having beveled adjoining surfaces, disposed between said annular plate and said housing and having annular end walls disposed in opposed relation to a packing bearing surface of said enlarged housing opening section;
• a packing disposed between said annular side walls of said lenses and said packing bearing surface, said packing having an inner annular wall engaging the annular side walls of said lenses, said inner annular wall of said packing having a recess registrable with the adjacent beveled surfaces of said lenses when said packing is disposed in assembled condition between said lenses and said packing bearing surface;
• and
• clamp means for urging said annular plate member into engagement with said packing, said packing occupying a portion of said recess when urged by said clamping means, whereby said packing is caused to compressed and expanded laterally to place said lenses in radial compression and provide a fluid tight seal between said housing and a least one of said lenses, and said packing material is prevented from being forced between said lenses to wedge said lenses apart.

A sight glass assembly comprising:

• a housing having an opening therethrough, mountable on a vessel wall having an opening therein communicating with a fluid contained therein so that said housing opening registers with said vessel wall opening;
• said housing opening having an enlarged section providing a packing bearing surface;
• an annular plate member mounted on said housing;
• at least two lenses disposed in said enlarged housing opening section, said lenses having beveled adjoining surfaces, being disposed between said plate member and said housing and having annular end walls disposed in opposed relation to said packing bearing surface;
• a packing disposed between said annular side walls of said lenses and said packing bearing surface, said packing having an inner annular wall engaging the annular side walls of said lenses, said inner annular wall of said packing having a recess registrable with the adjacent beveled surfaces of said lenses when said packing is disposed in an assembled condition between said lenses and said packing bearing surface;
• a compression ring disposed in said enlarged housing opening section;
• and
• clamp means for urging said compression ring into engagement with said packing, said packing occupying a portion of said recess when urged by said clamp means, whereby said packing is caused to be compressed and expanded radially to place said lenses in radial compression and provide a fluid tight seal between said housing and at least one of said lenses, and said packing material is prevented from being forced between said lenses to wedge said lenses apart.