Forward and reverse indexing mechanism for automatic typewriter

Details Forward and reverse indexing mechanism for automatic typewriter Forward and reverse indexing mechanism for automatic typewriter

1975-06-04

1976-09-07

Burr, Edgar S.

Textiles: fiber preparation

197120, 197127R, B41J 1990

Patent

active

039789632

ABSTRACT:
A combined forward and reverse indexing mechanism for an automatic typewriter. A pivotally mounted actuator arm is interposed between a common cam drive mechanism in the typewriter and either a forward indexing linkage or a reverse indexing linkage. An electromagnet selectively pivots the actuator arm to engage the forward or reverse linkage and to rotate the typewriter platen in a forward or reverse direction, respectively.

REFERENCES:
patent: 2791311 (1957-05-01), Yerks et al.
patent: 3640370 (1972-02-01), Denley
IBM Tech. Disc. Bulletin, J. B. O'Daniel et al., vol. 10, No. 12, May 1968, p. 1904.
IBM Tech. Disc. Bulletin, G. T. Miles, vol. 7, No. 11, Apr. 1965, pp. 1082-1083.

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