US PATENT SUBCLASS 335 / 151
.~ Vacuum or hermetically sealed type (e.g., reed switch)

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
151.~ Vacuum or hermetically sealed type (e.g., reed switch) {3}
152  DF  .~.~> Plural
153  DF  .~.~> With permanent magnet structure
154  DF  .~.~> Armature, contact or contact-actuating means (e.g., sealed reed)

DEFINITION

Classification: 335/151

(under subclass 2) Subject matter and wherein at least the contacts, of an electromagnetic switch operate in at least a partial vacuum or wherein the contacts are housed in a space hermetically sealed and containing a significant gas. The switches found here are for the most part those commonly referred to as "reed switches".

SEE OR SEARCH THIS CLASS, SUBCLASS:

47+, for conductive liquid switches wherein the contacting members may be in a sealed enclosure.

93+, for vibratory switches with reed type contacts which may or may not be tuned to a particular frequency.

235, for polarized electromagnet with vibrating reed or spring bar type armature.

292, for lifting or attracting type electromagnet of the hermetically sealed type.

SEE OR SEARCH CLASS 178, Telegraphy,

47+, for vibrating reed type telegraphy apparatus.

200, Electricity: Circuit Makers and Breakers,

152, for liquid contact switches in sealed containers.