US PATENT SUBCLASS 337 / 28
.~ Space discharge device (gaps, lightning arrester, etc.)

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
28.~ Space discharge device (gaps, lightning arrester, etc.) {4}
29  DF  .~.~> Plural
30  DF  .~.~> With explosive or combustible material
31  DF  .~.~> With fusible element (e.g., cutout means) {2}
34  DF  .~.~> Housing, casing, mounting or support means

DEFINITION

Classification: 337/28

(under subclass 14) Subject matter relating to the structure of an electrothermal current device under the class definition combined with further protective means comprising a normally open gap whereby a discharge may take place between the line contacts when open or between one of the line contacts and ground.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices, appropriate subclasses for electric space discharge devices in general.

315, Electric Lamp and Discharge Devices: Systems,

56+, for discharge devices acting as a load and combined with an impedance and subclasses 119+ for discharge devices with a cut out.

361, Electricity: Electrical Systems and Devices,

117+, for lightning arresters generally. 439, Electrical Connectors,

182, for a lamp or electron tube socket including arc suppressing means, which means may comprise a protective air gap type discharge device; subclasses 621+ for an electrical connector combined with a named fuse or comprising a casing, housing, or holder for receiving and fully enclosing a fuse.