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US 3,959,577 AGranted
Hermetic seals for insulating-casing structures
AssigneeWestinghouse Electric Corp.
InventorRussell E. Frink
Life of this patent
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AssigneeWestinghouse Electric Corp.
InventorRussell E. Frink
Estimating the term…
Improved hermetic seals for casing structures, particularly applicable for insulating-casing structures utilized in connection with gas-type piston-flow circuit-interrupters, are provided including end metallic closure-plate members, which are hermetically sealed in a gas-tight manner to the ends of generally-tubular, or cylindrically-shaped insulating-casing structures, such as porcelain casings, for example. In some embodiments of the invention, an internally-located ring-shaped, mounting-flange member, or adapter ring, is secured, as by a cemented, or babbitted construction, to the inner internal end surface of the insulating-casing structure, and suitable hermetic sealing means are provided for attaching the metallic end closure plate member to this internally-disposed supporting-flange, or adapter member. In other embodiments of the invention, there is provided an externally-located supporting ring-shaped flange-member cemented, or babbitted to an end portion externally of the tubular insulating casing member, and in this particular instance, the end metallic closure plate member may be secured, as by a bolted connection, to such externally-disposed flange-member, with, preferably, a gasket and a solder-sealed ring-shaped mounting member, the latter being affixed, as by a soldered connection, to such end metallic closure-plate member.
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.
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.
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.
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.
Dependencies are inferred from the claim text.