Shift mechanism for typewriter apparatus

Details Shift mechanism for typewriter apparatus Shift mechanism for typewriter apparatus

1974-06-06

1976-01-27

Bagwill, Robert E.

Textiles: fiber preparation

197 73, 197 79, B41J 1114

Patent

active

039346978

ABSTRACT:
A shift mechanism for a typewriter comprises a platen supporting frame which is mounted for movement about a predetermined axis to align the position of the platen with the type case, numeral or symbol to be printed. The mechanism has capability of shifting the platen and is used both for the change-over of the two different types and for selecting one of three different types. A locking device is provided for the typewriter which allows the continuous printing operation with the changed-over type position maintained as it is, while, for the change-over of letters, such as from a lower to an upper case letter for a single printing operation, the changed-over position is released from the locked state. The holding and releasing of the changed-over position of type can be effected by actuating the key for the type change-over operation without requiring any specific manipulation.

REFERENCES:
patent: 1071976 (1913-09-01), Weeden
patent: 1412637 (1922-04-01), Uhlig
patent: 1417904 (1922-05-01), Hess et al.
patent: 1433935 (1922-10-01), Campbell
patent: 2178682 (1939-11-01), Dobson
patent: 2705553 (1955-04-01), Thomson
patent: 2859852 (1958-11-01), Suif
patent: 3057449 (1962-10-01), Thomson
patent: 3572488 (1971-03-01), Kuramochi

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