US PATENT SUBCLASS 400 / 668
.~ Locking means actuated in response to a condition

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

663  DF  LOCKING OR INTERLOCKING MECHANISM {7}
668.~ Locking means actuated in response to a condition {4}
669  DF  .~.~> Failure of power supply
670  DF  .~.~> End-of-page lock (e.g., responsive to preset condition) {2}
671  DF  .~.~> End of maximum typed line {5}
673  DF  .~.~> Coin-controlled lock (e.g., responsive to print-lines, time, etc.)

DEFINITION

Classification: 400/668

Locking means actuated in response to a condition:

(under subclass 663) Subject matter wherein significance is attributed to means for preventing an operation from occurring or to means for preventing a normally movable member from moving, either means being made effective as a result of a characteristic or state of environment or the occurrence of a predetermined event in a typewriter.