US PATENT SUBCLASS 400 / 477
.~ Including means generating a signal for type selecting or other typing function

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

472  DF  KEY-BOARD OR KEY LEVER-ACTUATING MECHANISM {12}
477.~ Including means generating a signal for type selecting or other typing function {2}
478  DF  .~.~> Via slidable code bars
479  DF  .~.~> Via electrical component (e.g., switch, stylus, etc.) in or with key-board {2}

DEFINITION

Classification: 400/477

Including means generating a signal for type selecting or other typing function:

(under subclass 472) Subject matter wherein a typewriter is provided with means for producing a pulse or code indication whenever a key* element is pressed.

(1) Note. The key element may be one that is pressed to select a character* or one that is pressed for case-shift* or one that is pressed to perform any function* of the typewriter.

(2) Note. Included in this subclass are disclosures wherein the pressing of a key causes a light to pass to a photoelectric cell, for example, to generate a signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

100+, for a typewriter having a permutative key-board*, and wherein pressing of different permutations of keys generates signals to type different character symbols.