Sight glass assembly

Claim 2

A sight glass assembly comprising housing means having an outer side, an inner side mountable on a vessel wall having an opening therein and an opening therethrough registrable with the opening in said wall when said housing means is mounted on said wall, a lens having outer and inner sides mounted in said opening of said housing means, said opening in said housing means having a peripheral wall inclined away from and in opPosed relation to the periphery of said lens, packing means consisting of a resilient material interposed between the periphery of said lens and the inclined wall of the opening in said housing means, a faceplate disposed about the inner periphery of said lens engaging said packing means and means for securing said faceplate to the inner side of said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 3

A sight glass assembly according to claim 1, wherein the lens is circular, the inclined wall is frustoconical and the faceplate is annular.

Claim 4

A sight glass assembly comprising housing means having an opening therethrough, a lens mounted in said opening, said opening having a peripheral wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material interposed between the periphery of said lens of the inclined wall of the opening in said housing means, a faceplate disposed about a periphery of said lens engaging said packing means, said packing means being adhesively secured to said lens and said faceplate, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 5

A sight glass assembly comprising housing means having an opening therethrough, a lens mounted in said opening, said opening having a peripheral wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material interposed between the periphery of said lens of the inclined wall of the opening in said housing means, a faceplate disposed about a periphery of said lens engaging said packing means, said packing means being adhesively secured to said lens and said faceplate, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 6

A sight glass assembly according to claim 3 wherein the lens is circular, the inclined wall is frustoconical and the faceplate is annular.

Claim 7

A sight glass assembly comprising housing means having an opening therethrough, a circular lens mounted in said opening, said opening having a peripheral, frustoconical wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material interposed between the periphery of said lens and the inclined wall of the opening in said housing means, an annular faceplate disposed about the periphery of said lens engaging said packing means, said packing means having an annular flange portion interposed between said faceplate and said housing means, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 8

A sight glass assembly comprising housing means having an opening therethrough, a circular lens mounted in said opening, said opening having a peripheral, frustoconical wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material interposed between the periphery of said lens and the inclined wall of the opening in said housing means, an annular faceplate disposed about the periphery of said lens engaging said packing means, said packing means having an annular flange portion interposed between said faceplate and said housing means, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 9

A sight glass assembly according to claim 5 wherein said packing means is adhesively secured to said lens and said faceplate.

Claim 10

A sight glass assembly comprising housing means having an opening therethrough, a circular lens mounted in said opening, said opening having a peripheral frustoconical wall inclined away from and in an opposed relation to the periphery of said lens, packing means consisting of resilient materials interposed between the periphery of said lens and the inclined wall of the opening in said housing means, an annular faceplate disposed about the periphery of said lens engaging said packing means, annular cushioned gaskets interposed between the lens and the housing means and the lens and the faceplate, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 11

A sight glass assembly comprising housing means having an opening therethrough, a circular lens mounted in said opening, said opening having a peripheral frustoconical wall inclined away from and in an opposed relation to the periphery of said lens, packing means consisting of resilient materials interposed between the periphery of said lens and the inclined wall of the opening in said housing means, an annular faceplate disposed about the periphery of said lens engaging said packing means, annular cushioned gaskets interposed between the lens and the housing means and the lens and the faceplate, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 12

A sight glass assembly according to claim 7 wherein said packing means is adhesively secured to said lens and said faceplate.

Claim 13

A sight glass assembly comprising housing means having an opening therethrough, a circular lens mounted in said opening, said opening having a peripheral, frustoconical wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material interposed between the periphery of said lens and the inclined wall of the opening in said housing means, an annular faceplate diSposed about the lower periphery of said lens engaging said packing means, said housing structure having an annular beveled surface opposed to said faceplate, said packing means including an annular flange portion interposed between said faceplate and the annular beveled portion of said housing means, annular cushioning gaskets interposed between said lens and said housing means, and said lens and said annular faceplate, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 14

A sight glass assembly comprising housing means having an opening therethrough, a circular lens mounted in said opening, said opening having a peripheral, frustoconical wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material interposed between the periphery of said lens and the inclined wall of the opening in said housing means, an annular faceplate diSposed about the lower periphery of said lens engaging said packing means, said housing structure having an annular beveled surface opposed to said faceplate, said packing means including an annular flange portion interposed between said faceplate and the annular beveled portion of said housing means, annular cushioning gaskets interposed between said lens and said housing means, and said lens and said annular faceplate, and means for securing said faceplate to said housing means to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward said lens to provide a compressive force about the periphery thereof.

Claim 15

A sight glass assembly according to claim 9 wherein said packing means is adhesively secured to said lens.

Claim 16

A sight glass assembly comprising housing means having an opening therethrough, a lens mounted in said opening, said opening having a peripheral wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material disposed in said opening between the periphery of said lens and the inclined wall of the opening in said housing means, liner means consisting of a corrosive resistant material interposed between the lens and said packing means including an outwardly projecting flange portion, a faceplate disposed about the lower periphery of said lens engaging said flange portion of said liner means, means for securing said faceplate to said housing means to apply a force through said flange portion of said liner means directed against said inclined wall of said opening whereby the packing means is forced toward the lens to provide a compressive force about the periphery of the lens and packing means disposed between the periphery of said lens and said faceplate.

Claim 17

A sight glass assembly comprising housing means having an opening therethrough, a lens mounted in said opening, said opening having a peripheral wall inclined away from and in opposed relation to the periphery of said lens, packing means consisting of a resilient material disposed in said opening between the periphery of said lens and the inclined wall of the opening in said housing means, liner means consisting of a corrosive resistant material interposed between the lens and said packing means including an outwardly projecting flange portion, a faceplate disposed about the lower periphery of said lens engaging said flange portion of said liner means, means for securing said faceplate to said housing means to apply a force through said flange portion of said liner means directed against said inclined wall of said opening whereby the packing means is forced toward the lens to provide a compressive force about the periphery of the lens and packing means disposed between the periphery of said lens and said faceplate.

Claim 18

A sight glass assembly according to claim 11, wherein the lens is circular, the inclined wall is frustoconical, the liner means is cylindrical having an annular flange portion and the faceplate is annular.

Claim 19

A sight glass assembly according to claim 12, wherein the packing means is provided with an annular flange portion interposed between said flange portion of the liner means and said housing means.

Claim 20

A sight glass assembly according to claim 12, wherein annular cushioning gaskets are interposed between the lens and the housing means and the lens and the faceplate.

Claim 21

A sight glass assembly accordingly to claim 11, wherein the lens is circular, the opening wall is frustoconical, the liner means is cylindrical having an annular flange portion, the faceplate is annular, the housing structure is provided with an annular beveled surface opposed to the annular flange portion of the liner means, the packing means includes an annular flange portion interposed between the annular portion of the liner means and the annular beveled surface of the housing means and annular cushioning gaskets are provided between the lens and the housing means and the lens and the annular faceplate.

Claim 22

A lens unit adapted to be mounted in a sight glass assembly including housing means having an opening therethrough, the opening having an inclined wall, comprising a lens mountable in said opening so that the periphery thereof will oppose said inclined wall of said opening, a packing means consisting of a resilient material adhesively secured to the periphery of said lens whereby the packing means is interposed between the periphery of the lens and the inclined wall of said opening when said lens is mounted within said opening, a faceplate disposed about the lower periphery of said lens adhesively secured to said packing means and means for securing said faceplate to said housing means when said lens is mounted in said opening to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward the lens to provide a compressive radial force about the periphery of said lens.

Claim 23

A lens unit adapted to be mounted in a sight glass assembly including housing means having an opening therethrough, the opening having an inclined wall, comprising a lens mountable in said opening so that the periphery thereof will oppose said inclined wall of said opening, a packing means consisting of a resilient material adhesively secured to the periphery of said lens whereby the packing means is interposed between the periphery of the lens and the inclined wall of said opening when said lens is mounted within said opening, a faceplate disposed about the lower periphery of said lens adhesively secured to said packing means and means for securing said faceplate to said housing means when said lens is mounted in said opening to apply a force on said packing means directed against said inclined wall whereby the packing means is forced toward the lens to provide a compressive radial force about the periphery of said lens.

Claim 24

A lens unit adapted to be mounted in a sight glass asSembly including housing means having an opening therethrough, the opening having an inclined wall, comprising a faceplate having an opening therein, a lens secured to said faceplate across the opening thereof, liner means consisting of a corrosive resistant material disposed about the periphery of said lens including an outwardly projecting portion engageable with said faceplate, packing means consisting of a resilient material disposed on said liner means engageable with said inclined wall of the opening in said housing means when said lens is inserted in the opening of said housing means and means for securing said faceplate to said housing means to apply a force through said flange portion of said liner means directed against said inclined wall of the opening of said housing means whereby the packing means is forced toward the lens to provide a compressive force about the periphery of the lens.

Claim 25

A lens unit adapted to be mounted in a sight glass asSembly including housing means having an opening therethrough, the opening having an inclined wall, comprising a faceplate having an opening therein, a lens secured to said faceplate across the opening thereof, liner means consisting of a corrosive resistant material disposed about the periphery of said lens including an outwardly projecting portion engageable with said faceplate, packing means consisting of a resilient material disposed on said liner means engageable with said inclined wall of the opening in said housing means when said lens is inserted in the opening of said housing means and means for securing said faceplate to said housing means to apply a force through said flange portion of said liner means directed against said inclined wall of the opening of said housing means whereby the packing means is forced toward the lens to provide a compressive force about the periphery of the lens.