US PATENT SUBCLASS 337 / 69
.~.~.~ Independently operative (nontrip-free)

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

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
36  DF  .~ With bimetallic elements (i.e., motion takes place in a plane at right angles to its major axis) {10}
37  DF  .~.~ With manual or other mechanical contact controlling means {12}
69.~.~.~ Independently operative (nontrip-free)

DEFINITION

Classification: 337/69

(under subclass 37) Subject matter including significant structure of both bimetallic and either manual or other contact actuating or controlling means, the different means being operative separately and distinctly to open and close the contacts, independently each of the other.

(1) Note. Subclass 74 provides for mechanisms of the so called trip free type where the mechanical means actuates the contacts into open or closed position and the bimetallic means controls the mechanical means via latching or tripping means. In that type of device the actual control of the contacts is by mechanical means the relationship being such that the contacts cannot be independently manually reclosed as in the device set forth in this subclass (69) while an overload condition exists.

(2) Note. The mechanical operating means to be actuated by the bimetallic element may comprise means released by the bimetallic means acting as a latch whereby the contacts are mechanically operated or closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

355, for similar devices with thermally responsive bimetallic actuating means.