Typewriting machines – Having power-driven operator for plural functions
Patent
1983-01-04
1985-09-03
Wright, Jr., Ernest T.
Typewriting machines
Having power-driven operator for plural functions
4001442, 4001571, 400187, 400212, 400225, 4006971, 4001961, 400208, 741255, 192 12BA, 192 41S, B41J 2300
Patent
active
045389314
ABSTRACT:
A drive mechanism for a member to be driven in one direction is disclosed. The mechanism is incorporated in an electronic typewriter and includes a clutch including a clutch spring which provides a driving connection between a small DC motor and the member to be driven of the typewriter. Means is provided which normally holds a driven member of the clutch to a particular angular position and, when the motor is energized, it releases the driven member to allow the driven member to be rotated by the motor. After a cycle of rotation of the driven member, the holding means positively stops rotation of the second element and hence of the driving member and the motor.
A new and efficient ribbon feed mechanism is also disclosed which enables selective use of a carbon ribbon and a fabric ink ribbon depending upon a cassette mounted thereon.
REFERENCES:
patent: 1480698 (1924-01-01), Shiek
patent: 2885042 (1959-05-01), Frechette
patent: 3835972 (1974-09-01), Helander
patent: 3837450 (1974-09-01), Malion et al.
patent: 4055935 (1977-11-01), Malion et al.
patent: 4061219 (1977-12-01), Nishikawa et al.
patent: 4079298 (1978-03-01), Prager
IBM Technical Disclosure Bulletin, "Modular Increment Clutch", Overton, vol. 21, No. 2, Jul. 1978, pp. 471-472.
IBM Technical Disclosure Bulletin, "Spring Clutch Control Mechanism, Crutcher et al., vol. 21, No. 4, Sep. 1978, pp. 1527-1529.
IBM Technical Disclosure Bulletin, "Modified Wrap Down Spring Clutch for Typewriters and the Like", Shuman, vol. 22, No. 10, Mar. 1980, pp. 4641-4641.
Silver Seiko Ltd.
Wright, Jr. Ernest T.
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