US PATENT SUBCLASS 337 / 221
.~.~ With electrical shunt circuit means (may also be fusible)


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

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
142  DF  .~ Fusible element actuated {15}
221.~.~ With electrical shunt circuit means (may also be fusible)


DEFINITION

Classification: 337/221

(under subclass 142) Subject matter including significant details of means whereby a shunt circuit is provided in parallel with the fusible element thereby increasing the maximum fusing current of the device. The devices to be found here are generally of the high voltage type.

(1) Note. When the sole purpose of the shunting circuit is to conduct current through a light or other indicating means, classification will be in subclass 241 as an indicating device.

SEE OR SEARCH THIS CLASS, SUBCLASS:

158+, for fuses claimed as "high voltage" or "current limiting" and employing a resistance in parallel with the fusible element or elements.

SEE OR SEARCH CLASS

218, High-Voltage Switches With Arc Preventing and Extinguishing Devices, 8+, for arc prevention means comprising an auxiliary shunt circuit combined with fuse means.