Typewriter with a print wheel and hammer driven by one motor

Details Typewriter with a print wheel and hammer driven by one motor Typewriter with a print wheel and hammer driven by one motor

1988-08-01

1990-02-20

Wiecking, David A.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Including type-faces movable relative to type-face-carrier

4001572, 400185, 101 9318, B41J 130

Patent

active

049021486

ABSTRACT:
A typewriter or similar machine with a print wheel disposed on a shaft drivable by a motor, the characters of which are printed by means of a hammer. In accordance with the invention, use of a separate print magnet is to be omitted. This is made possible by the use of a lift-rotation motor. Its rotational movement is used for the rotational positioning of the print wheel, while the axial movement of the motor shaft is transferred to a print hammer pivotably disposed on the carriage. Determination of the engagement point of the motor shaft with the print hammer makes possible the optimum determination of the movement cycle of the print hammer as well as its print force. Thus the space above the motor for the print wheel, otherwise required for a print magnet, can be used for other purposes. Additionally there is a reduction of the masses which are required to be moved along the platen.

REFERENCES:
patent: 564488 (1896-07-01), Johnson
patent: 1023855 (1912-04-01), King et al.
patent: 4049109 (1977-09-01), Plaza et al.
patent: 4099106 (1978-07-01), Nikaido
patent: 4124312 (1978-11-01), Johnson
patent: 4234831 (1980-11-01), Kemmer et al.
patent: 4351618 (1982-09-01), Prewarski
Arter, Bajgert & Wills, "Stepping Motor with Shaft To Translation", IBM Technical Disclosure Bulletin, vol. 26, No. 4, Sep. 83, pp. 1897-1898.

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