US PATENT SUBCLASS 70 / 267
.~ Predetermined time interval controlled

Current as of: June, 1999
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70 /   HD   LOCKS

266  DF  OPERATING MECHANISM {6}
267.~ Predetermined time interval controlled {3}
268  DF  .~.~> Positively initiated delay interval {2}
271  DF  .~.~> Electric
272  DF  .~.~> Clockwork control {1}

DEFINITION

Classification: 70/267

(under subclass 266) Devices including mechanism providing for operation after a predetermined time interval has elapsed, the locking mechanism being primarily under the control of the time mechanism.