Power recovery apparatus for an electric typewriter

Details Power recovery apparatus for an electric typewriter Power recovery apparatus for an electric typewriter

1979-09-14

1981-07-21

Wright, Jr., Ernest T.

Typewriting machines

Control of print position along print-line by signal...

400 54, 400 70, 400320, 400322, 400328, 364900, B41J 1900

Patent

active

042795230

ABSTRACT:
An electric typewriter includes a RAM memory for storing selected characters to be printed and for storing data relating to the present escapement position and future escapement destination of a printing head of the typewriter. A control unit operates a printer to print the stored characters in the memory unit and, when a power interrupt occurs and power is subsequently restored, the control unit accesses particular position data in the memory in accordance with the angular position of a print shaft of the typewriter at the time of the power interrupt. The accessed data is employed to define a proper return escapement position for the printing head of the typewriter.

REFERENCES:
patent: 3233715 (1966-02-01), Flieg
patent: 3554347 (1971-01-01), Perkins
patent: 4051945 (1977-10-01), Fujimoto et al.
patent: 4067430 (1978-01-01), Wienhold

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