US PATENT SUBCLASS 337 / 128
.~.~.~ Latching or tripping means

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

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
123  DF  .~ With longitudinally expansible solid element (e.g., rod, wire strip, etc.) {7}
126  DF  .~.~ With manual or other mechanical contact actuating means {3}
128.~.~.~ Latching or tripping means {2}
129  DF  .~.~.~.~> With adjustment or calibration means
130  DF  .~.~.~.~> With reset or reclosing means

DEFINITION

Classification: 337/128

(under subclass 126) Subject matter including significant details of means whereby the switch contacts may be restrained in an open or closed condition by a latch or detent which may be tripped by the action of the electrothermally responsive expansible device. The contacts are usually held in circuit closing position and tripped to open position when the tripping means is operated.

(1) Note. For other latch or trip means used in devices of this class, see subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 46.

SEE OR SEARCH THIS CLASS, SUBCLASS:

385, for similar devices utilizing thermally responsive elements.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

2+, for automatic latch or trip mechanisms and subclasses 527+ for mechanical latching or detent devices in general. 200, Electricity: Circuit Makers and Breakers,

411+, 415, 424+, 470, and 471 for mechanical snap switches with latch and/or trip means, subclass 83 for fluid pressure switches of the diaphragm type with latching means.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, appropriate subclasses; particularly

21+, 77, 113, 164, 165, 166, 167+, and 172+ for electromagnetically operated switches with latching or tripping means.

361, Electricity: Electrical Systems and Devices,

139+, for control circuits for electromagnetic devices with latch mechanisms.