US PATENT SUBCLASS 400 / 365
HAVING ROTATED POWER DRIVE INTERMITTENTLY APPLIED FOR TYPE-BAR ACTUATION

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

365HAVING ROTATED POWER DRIVE INTERMITTENTLY APPLIED FOR TYPE-BAR ACTUATION {7}
366  DF  .~> Including jam-release means
367  DF  .~> Interposed components driven by filter shaft
368  DF  .~> For repeat-type action {1}
370  DF  .~> Via continously rotated power roll {5}
377  DF  .~> Via limited-rotation clutch {1}
379  DF  .~> Via spring drive (e.g., spring-driven snatch roll) {2}
382  DF  .~> Via reciprocating common actuator

DEFINITION

Classification: 400/365

HAVING ROTATED POWER DRIVE INTERMITTENTLY APPLIED FOR TYPE-BAR ACTUATION:

(under the class definition) Subject matter wherein mechanical energy is used to turn a shaft, said shaft being the origin of the force needed to perform any of the typing operations in a typewriter, and wherein said shaft is caused to be connected temporarily to a force-transmitting member only when an operation is to be performed, which operation includes the movement of a type-bar* (i.e., having a type-face* element thereon) from a rest position to a print-point* position for imprinting a character* on a record-medium*, or the movement of any element of a typewriter to perform a typing function*.

(1) Note. The mechanical energy is usually supplied by a electric motor that is powered to rotate continuously. The operation usually performed is the intermittent (i.e., on demand of the typist) actuation of a succession of type-bar members that are on a type-bar-segment*, but is not limited to that operation. A typist using such an "electric typewriter" needs to exert only as much force in depressing a key* element as is needed to connect the force-transmitting member to the shaft or to release the energy stored in a spring to actuate an operation such as type-bar actuation, carriage feed, carriage return, case-shift*, etc., the named operations being only exemplary. The power may be applied directly via a power roll of a linkage or may be applied indirectly via means to transfer the power to an intermediate selectively operated actuator (e.g., such as a spring) capable of storing the power.

SEE OR SEARCH THIS CLASS, SUBCLASS:

192, for a continuously rotated power drive intermittently applied for ribbon* feed or vibrator* actuation.