US PATENT SUBCLASS 335 / 19
.~.~.~ Zero current

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

Internet Version by PATENTEC © 1999      Terms of Use


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}
18  DF  .~.~ Responsive to predetermined or abnormal current condition (e.g., direction, phase angle or amplitude) {1}
19.~.~.~ Zero current

DEFINITION

Classification: 335/19

(under subclass 18) Subject matter wherein the automatically responsive means is designed to be actuated when the current in the circuit to be controlled falls to a zero value.