Type carrier return and platen line space device for typewriters

Details Type carrier return and platen line space device for typewriters Type carrier return and platen line space device for typewriters

1981-07-08

1984-07-31

Wright, Jr., Ernest T.

Typewriting machines

Carriage or carriage-moving or movement-regulating mechanism

Carriage-return mechanism

4003146, 4003173, 4003343, 400478, 400549, 400568, 400664, B41J 1970

Patent

active

044627092

ABSTRACT:
A carriage return device in a typewriter including: an interposer operable through operation of a key lever for the carriage return; a cycle bail driven by the interposer; a driving source adapted to rotate a main shaft by a predetermined number of rotations in association with the cycle bail; a cycle clutch for intermittently transmitting a driving force to the main shaft; an actuating bail for performing a cycle of movement having a locus of a predetermined mode to cause the interposer to disengage from the cycle bail; a carriage return bell crank for operating in association with the interposer when the interposer moves in the direction of disengaging from the cycle bail; a carriage return clutch operable by the carriage return bell crank; a carriage driving device for driving the carriage to return through operation of the carriage return clutch; and a mechanism for operating to return the carriage return bell crank upon completion of carriage return; wherein the carriage return device further includes a mechanism for releasing the carriage from an escapement rack in association with the carriage return bell crank.

REFERENCES:
patent: 2879876 (1959-03-01), Palmer et al.
patent: 2902133 (1959-09-01), Walton et al.
patent: 3592309 (1971-07-01), Craft et al.
IBM Selectric Typewriter Service Manual, published May, 1975, pp. 93-95.

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