US PATENT SUBCLASS 340 / 635
.~.~ Condition of electrical apparatus

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

Internet Version by PATENTEC © 1999      Terms of Use


340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
635.~.~ Condition of electrical apparatus {15}
636  DF  .~.~.~> Battery
637  DF  .~.~.~> Watt-hour meter
638  DF  .~.~.~> Fuse or circuit breaker {1}
640  DF  .~.~.~> Heater element
641  DF  .~.~.~> Signalling light element {2}
644  DF  .~.~.~> Switch or relay
645  DF  .~.~.~> Rectifier
646  DF  .~.~.~> Transformer
647  DF  .~.~.~> Insulation
648  DF  .~.~.~> Motor
649  DF  .~.~.~> Condition of intentional grounding circuit
650  DF  .~.~.~> Undesired circuit ground or short {1}
652  DF  .~.~.~> Breaking of circuit continuity
653  DF  .~.~.~> Electronic circuit or component
654  DF  .~.~.~> Circuit energization {2}

DEFINITION

Classification: 340/635

Condition of electrical apparatus:

(under subclass 540) Subject matter wherein the monitored condition is an electrical property of a specific electrical device or circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

506+, for an electrical alarm circuit or element, the integrity of which is monitored.

584+, for monitoring the thermal characteristics of electrical devices.

657+, for characteristics of electricity, per se, not representative of the condition of a particular device.

SEE OR SEARCH CLASS

219, Electric Heating, 248, for a heating device combined with a sole plate-type pressure application means (e.g., a flatiron, etc.) including a condition-responsive indicator, subclass 445.1 for an exposed planar support surface for material to be heated (e.g., hot plate, etc.) including an indicator, subclasses 446.1+ for an exposed planar support surface for material to be heated (e.g., hot plate, etc.) including a sensing means, or subclass 506 for a heating device having automatic regulating or control of power supply and voltage including signal or indicator means.

324, Electricity: Measuring and Testing,

403+, for testing of electric lamp or discharge devices; and subclasses 415+ for the testing of electromechanical switching devices.