Hermetic seals for insulating-casing structures

Claim 2

In combination, a porcelain casing having a sand band on the inner surface thereof adjacent one end thereof, said porcelain casing additionally having a platinum band on the outer surface thereof adjacent the end thereof, a metallic adapter-ring cemented internally of said hollow porcelain casing to said internally-located sand band, an end metallic closure plate having a metallic flanged solder-ring affixed thereto, means securing said end metallic closure plate to said internally-located adapter-ring, and the solder-ring being affixed by a hermetic solder-seal to said externally-located platinum band.

Claim 3

The combination according to claim 1, wherein the internally-located adapter-ring is babbitted to said sand band.

Claim 4

The combination according to claim 1, wherein an annular resilient gasket is located between the end surface of said porcelain casing and the end metallic closureplate.

Claim 5

The combination according to claim 1, wherein the end metallic closure-plate is threadedly secured to said internally-located adapter-ring.

Claim 6

In combination, a porcelain casing having a sand band on the outer surface thereof adjacent one end thereof, said porcelain casing additionally having a platinum band on the outer surface thereof adjacent the end external surface thereof, an outer-dispoed metallic adapter-ring cemented externally to said hollow porcelain casing to said externally-located sand band, an end relatively-heavy metallic closure plate having an annular metallic relatively thin flanged solder ring affixed thereto, means for removably clampingly securing said end metallic relatively-heavy closure plate to said externally-located adapter ring with the relatively-heavy metallic closure plate abutting the annular end of the porcelain casing, and the relatively thin solder-ring being affixed by a hermetic solder seal to the externally-located platinum-band provided adjacent the external end surface of the porcelain casing.

Claim 7

In combination, a porcelain casing having a sand band on the outer surface thereof adjacent one end thereof, said porcelain casing additionally having a platinum band on the outer surface thereof adjacent the end external surface thereof, an outer-dispoed metallic adapter-ring cemented externally to said hollow porcelain casing to said externally-located sand band, an end relatively-heavy metallic closure plate having an annular metallic relatively thin flanged solder ring affixed thereto, means for removably clampingly securing said end metallic relatively-heavy closure plate to said externally-located adapter ring with the relatively-heavy metallic closure plate abutting the annular end of the porcelain casing, and the relatively thin solder-ring being affixed by a hermetic solder seal to the externally-located platinum-band provided adjacent the external end surface of the porcelain casing.

Claim 8

The combination according to claim 5, wherein one or more mounting bolts pass through openings provided in the relatively heavy end metallic closure-plate and are threaded into tapped openings provided in the adapter-ring.

Claim 9

The combination according to claim 5, wherein the adapter-ring is babbitted to the external sand band provided on the porcelain casing.

Claim 10

In combination, a porcelain casing having a sand band on the inner surface thereof adjacent one end thereof, said porcelain casing additionally having a platinum-band on the outer surface thereof adjacent one end thereof, a metallic adapter ring cemented internally of said hollow porcelain casing to said internally-located sand band, an end metallic closure plate having a metallic flanged solder-ring affixed thereto on the outer surface thereof, said end metallic closure-plate having a threaded portion which threads onto the internally-located adapter-ring, a gasket positioned between a shoulder portion of the end metallic closure-plate and the extremity of the porcelain casing, and the solder-ring being affixed by a hermetic solder seal to said externally-located platinum-band on the external end surface of the porcelain casing.

Claim 11

In combination, a porcelain casing having a sand band on the inner surface thereof adjacent one end thereof, said porcelain casing additionally having a platinum-band on the outer surface thereof adjacent one end thereof, a metallic adapter ring cemented internally of said hollow porcelain casing to said internally-located sand band, an end metallic closure plate having a metallic flanged solder-ring affixed thereto on the outer surface thereof, said end metallic closure-plate having a threaded portion which threads onto the internally-located adapter-ring, a gasket positioned between a shoulder portion of the end metallic closure-plate and the extremity of the porcelain casing, and the solder-ring being affixed by a hermetic solder seal to said externally-located platinum-band on the external end surface of the porcelain casing.

Claim 12

The combination according to claim 8, wherein the internally-located metallic adapter ring is babbitted to the sand band provided internally of the porcelain casing.

Claim 13

In combination, a porcelain casing having a sand band provided internally thereof and a platinum-band provided externally thereof, means for affixing a collar-like solder-ring to said platinum band by a solder fillet, means cementing an internally-located adapter collar having a threaded portion to the internally-located sand band of the porcelain casing, an end metallic closure-plate having an extension having a threaded connection with said internally-threaded adapter ring, annular gasket means interposed between the end of the porcelain casing and the shoulder portion of the end metallic closure-plate, and a solder fillet affixment between the periphery of the solder-ring and the outer periphery of the end metallic closure plate.

Claim 14

In combination, a porcelain casing having a sand band provided internally thereof and a platinum-band provided externally thereof, means for affixing a collar-like solder-ring to said platinum band by a solder fillet, means cementing an internally-located adapter collar having a threaded portion to the internally-located sand band of the porcelain casing, an end metallic closure-plate having an extension having a threaded connection with said internally-threaded adapter ring, annular gasket means interposed between the end of the porcelain casing and the shoulder portion of the end metallic closure-plate, and a solder fillet affixment between the periphery of the solder-ring and the outer periphery of the end metallic closure plate.

Claim 15

The combination according to claim 10, wherein the internal threaded adapter collar is babbitted to the internally-located sand band of the porcelain casing.