US PATENT SUBCLASS 400 / 479
.~.~ Via electrical component (e.g., switch, stylus, etc.) in or with key-board

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

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

DEFINITION

Classification: 400/479

Via electrical component (e.g., switch, stylus, etc.) in or with key-board:

(under subclass 477) Subject matter wherein the pulse is produced by a device in an electrical circuit, which device completes the circuit whenever a key* element is pressed.

(1) Note. In the typewriter of this subclass the electrical circuit may include a rodlike element (i.e., stylus) held in a hand of the typist, which element is manually moved to contact a particular key element to complete the circuit.