US PATENT SUBCLASS 337 / 6
.~.~ With automatic circuit-interrupting device

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

2  DF  WITH SEPARATE DISTINCT DIVERSE ART-TYPE SWITCHING DEVICE (E.G., FLUID- OR MECHANICAL-ACTUATED) {2}
4  DF  .~ Fusible element device with other {4}
6.~.~ With automatic circuit-interrupting device {1}
7  DF  .~.~.~> Multiphase of multipole

DEFINITION

Classification: 337/6

(under subclass 4) Subject matter wherein the other art switching device comprises means whereby normally closed contacts are automatically opened upon the occurrence of an abnormal circuit condition.

(1) Note. This subclass also includes patents where the fusible element device is claimed in detail and the other art type switch is specifically described as a circuit breaker, providing plural distinctive switches are in fact claimed and the combination is not classifiable in another art.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

103+, for automatic circuit breakers, and subclasses 161+ for thermal controls for relays.