US PATENT SUBCLASS 335 / 39
.~.~.~.~ With time delay (e.g., thermal)

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

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
6  DF  .~ Automatic circuit-interrupting devices (e.g., circuit-protective devices) {12}
21  DF  .~.~ With latch or trip means {6}
38  DF  .~.~.~ Magnetic {3}
39.~.~.~.~ With time delay (e.g., thermal) {1}
40  DF  .~.~.~.~.~> Responsive to or proportional to degree of overload condition

DEFINITION

Classification: 335/39

(under subclass 38) Subject matter wherein the trip structure includes significant means whereby the tripping operation is delayed for a predetermined interval of time after the occurrence of the circuit condition tending to cause such a tripping action. The significant time delay means may consist of a thermal or other restraining means, provided that, it acts directly upon the magnetically operated tripping means to thereby prevent the said magnetic means from performing a tripping operation during the period of restraint.

SEE OR SEARCH THIS CLASS, SUBCLASS:

35+, for plural trips or combined operating means for a single trip.