US PATENT SUBCLASS 361 / 4
.~.~.~ Counter electromotive force

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

1  DF  SAFETY AND PROTECTION OF SYSTEMS AND DEVICES {32}
2  DF  .~ Arc suppression at switching point (i.e., includes solid-state switch) {4}
3  DF  .~.~ Synchronized or sequential opening or closing {5}
4.~.~.~ Counter electromotive force

DEFINITION

Classification: 361/4

Counter electromotive force:

(under subclass 3) Subject matter with means for inserting an opposing voltage or current across the switching points to effectively cancel the arc producing surge.