US PATENT SUBCLASS 361 / 91.4
.~.~.~ Including photo-coupling (e.g., photo-receptors, photo-emitters, etc.)

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

1  DF  SAFETY AND PROTECTION OF SYSTEMS AND DEVICES {32}
88  DF  .~ With specific voltage responsive fault sensor {4}
91.1  DF  .~.~ Overvoltage {6}
91.4.~.~.~ Including photo-coupling (e.g., photo-receptors, photo-emitters, etc.)

DEFINITION

Classification: 361/91.4

Including photo-coupling (e.g., photo-receptors, photo-emitters, etc):

(under subclass 91.1) Subject matter including a means responsive to light to produce an electrical signal (i.e., photocouple) and wherein the photocoupler is utilized in the detection and/or removal of the overvoltage condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

173, for abnormal voltage conditions in relay circuits wherein a light responsive element is utilized in offering protection

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing,

420, 556 for sensing voltage conditions involving photo-coupling, per se.