US PATENT SUBCLASS 340 / 527
.~.~ Time delay

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
501  DF  .~ With particular system function (e.g., temperature compensation, calibration) {8}
527.~.~ Time delay {2}
528  DF  .~.~.~> Entrance/exit
529  DF  .~.~.~> Condition persistence {1}

DEFINITION

Classification: 340/527

Time delay:

(under subclass 501) Subject matter having a circuit which delays the transmission of a signal, or the output of a transducer, for a desired length of time.

(1) Note. Time delay introduced by means other than circuitry, e.g., a transducer structure providing such a delay, is not classified herein.

SEE OR SEARCH CLASS

70, Locks,

267+, for time interval controlled lock operating mechanisms.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

261+, for miscellaneous time delay circuits. 361, Electricity: Electrical Systems and Devices,

91.3, for overvoltage protection with time delay and subclass 195 for time-delay systems.

368, Horology: Time Measuring Systems or Devices,

10+, for clocks combined with alarm or signal.