Line spacing mechanism for typewriters or like machines

Details Line spacing mechanism for typewriters or like machines Line spacing mechanism for typewriters or like machines

1981-07-08

1983-08-02

Burr, Edgar S.

Typewriting machines

For line-spacing by incremental rotation of platen

By pawl and ratchet wheel drive

4005751, 4005752, 4004402, B41J 1980

Patent

active

043963064

ABSTRACT:
A line spacing mechanism having a platen, a line spacing ratchet, a line spacing lever mounting a pawl adapted to engage and to drive said ratchet upon pivoting movement of said line space lever, a setting lever for controlling the time of engagement of said pawl and ratchet and adjustable stop means for limiting driving movement of said pawl and overtravel of the platen. The mechanism includes a single detent means for detentably holding said ratchet, said setting lever and said stop means, and includes means on said setting lever operable on said detent means to release said ratchet for irregular movement.

REFERENCES:
patent: 1121096 (1914-12-01), Hazen
patent: 1163563 (1915-12-01), Schneeloch
patent: 1402266 (1922-01-01), Spiro
patent: 2717070 (1953-12-01), Letterman
patent: 3763987 (1973-10-01), Kunst et al.
patent: 3934696 (1976-01-01), Mueller et al.

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