US PATENT SUBCLASS 400 / 294
.~.~ Stop-setting or stop-clearing mechanism

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

283  DF  CARRIAGE OR CARRIAGE-MOVING OR MOVEMENT-REGULATING MECHANISM {11}
284  DF  .~ For stopping carriage in tabular position (e.g., column-set positions) {10}
294.~.~ Stop-setting or stop-clearing mechanism {7}
294.1  DF  .~.~.~> With stop magazine (i.e., for supply of stops)
294.2  DF  .~.~.~> With key-locking mechanism
294.3  DF  .~.~.~> Drum-mounted tab-stops
295  DF  .~.~.~> Stop setting by linear shift of tab-stop or counter-stop {2}
296  DF  .~.~.~> Stop setting by movement of tab-rack {2}
297  DF  .~.~.~> Stop setting by partial rotation of tab stop relative to tab-rack
297.1  DF  .~.~.~> Stop setting by pivoting pawllike stop

DEFINITION

Classification: 400/294

Stop-setting or stop-clearing mechanism:

(under subclass 284) Subject matter wherein significance is attributed to structure for causing movement of a "tab-stop" element from a passive position (i.e., a position at which it will not engage with a "counter-stop" element) to an active (i.e., "set") position (i., e., a position at which it will engage with a counter-stop element to stop a moving carriage* in a "tabular" position), or for causing movement of a tab-stop element from an active position to a passive (i.e., "clear") position, or wherein significance is attributed to structure for causing movement of a counter-stop element from a passive position to an active position or for causing movement of a counter-stop element from an active position to a passive position.

(1) Note. The terms "tab-stop" element and "counter-stop" element have been discussed in the definition of tab-rack* in the Glossary, section III, and the term "tabular" has been discussed in the definition of tab* as well as in (2) Note to the definition of subclass 284 above.

(2) Note. This subclass provides for a type-writer wherein the tab stop(s) is/are cleared, i.e., moved from active

position to inactive position.