US PATENT SUBCLASS 361 / 91.1
.~.~ Overvoltage

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.~.~ Overvoltage {6}
91.2  DF  .~.~.~> With resistor sensor
91.3  DF  .~.~.~> Including time delay
91.4  DF  .~.~.~> Including photo-coupling (e.g., photo-receptors, photo-emitters, etc.)
91.5  DF  .~.~.~> Including P-N junction (e.g., a diode, a zener diode, or transistor) {1}
91.7  DF  .~.~.~> Protection by snubber circuitry
91.8  DF  .~.~.~> Protection for thyristor

DEFINITION

Classification: 361/91.1

Overvoltage:

(under subclass 88) Subject matter wherein the fault sensor is responsive to an overvoltage condition.

(1) Note. This subclass relates to protection involving overvoltage conditions which are considered to be fault conditions and not otherwise. Fault conditions are defined as those which could result in damage to the load circuit, if ignored, but do not include electrostatic discharge (ESD) event.

(2) Note. For ESD event protection, see Class 361, subclass 56.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18, for voltage regulation by sensing overvoltage conditions.

33, for sensing abnormal voltage conditions in motor circuits.

56, for load shunting by sensing an abnormal voltage condition.

111, for protection from transient overvoltage conditions. SEE OR SEARCH CLASS

257, Active Solid-State Devices, (e.g., Transistors, Solid-State Diodes),

173, for device protection from overvoltage.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

20, for automatically response to abnormal voltage condition.

340, Communications: Electrical,

662, for humanly perceptible means responsive to overvoltage.