US PATENT SUBCLASS 174 / 50.63
.~.~.~ Metal disk or ring-type seal


Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

50  DF  BOXES AND HOUSINGS {4}
50.5  DF  .~ Hermetic sealed envelope type {9}
50.61  DF  .~.~ With bonded seal for conductive member (e.g., glass to metal) {3}
50.63.~.~.~ Metal disk or ring-type seal


DEFINITION

Classification: 174/50.63

(under subclass 50.61) Subject matter where the lead-in conductor is in the form of a disc or ring, or has a flange forming a disc or ring thereon or is a metal tube, with the envelope sealed to either the side or edge of the disc or ring, or to the metal tube.

SEE OR SEARCH THIS CLASS, SUBCLASS:

50.55, where there are two lead-in conductors, one of which is a tube surrounding the other, and the envelope is sealed to the outer conductor and another hermetic seal is formed between the inner conductor and the outer conductor.

50.58, where a metal disc forms the closure for a ceramic or glass envelope and the closure and envelope are sealed together by a fused type seal.