Shift mechanism for typewriter

Details Shift mechanism for typewriter Shift mechanism for typewriter

1976-01-23

1977-09-27

Burr, Edgar S.

Textiles: fiber preparation

197 73, B41J 1114

Patent

active

040505677

ABSTRACT:
A shift mechanism for typewriters has the capability of moving the carriage and a platen supported thereby from a first position to a second or third position along a longitudinal path on opposite sides of the first position. The first position is the normal or center position of the carriage for typing letters in lower case. The second or upper and the third or lower positions of the carriage are positions to which the carriage is actuated by the shift mechanism for typing other forms of indicia such as letters in upper case, symbols and numerals or combinations of the same. The shift mechanism including a plurality of pivotable levers operating in concert and actuated by finger engageable levers actuate the carriage from the first position to one of the other positions for change-over of the form of indicia desired. The shift mechanism may be locked in the upper position for typing letters in upper case.

REFERENCES:
patent: 1071976 (1913-09-01), Weeden
patent: 1412637 (1922-04-01), Uhlig
patent: 1433935 (1922-10-01), Campbell
patent: 1586090 (1926-05-01), Kurowski
patent: 2705553 (1955-04-01), Thomson

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