Type wheel-type selector motor coupling detection device in prin

Typewriting machines – Including type-set-assemblage mounted on carrier and... – Including type-faces movable relative to type-face-carrier

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Details

318565, 400 54, 400 70, 400320, B41J 130, B41J 796

Patent

active

045824380

ABSTRACT:
A printer in which a platen is secured to a machine frame, a carriage is movably supported on the machine frame for movement along the platen, a motor is movably supported on the carriage for reciprocal movement in a direction at right angles to the direction of movement of the carriage towards and away from the platen, a pedal type wheel is fixedly secured to the carriage and has a plurality of types, mating coupling means is formed on each of the motor and type wheel, detection means is provided to generate a detection signal upon detection of a particular rotational angle of the motor during one complete rotation of the motor, a drive circuit is provided to drive the motor and a control circuit is provided to determine presence of a detection signal and arrests the rotation of the motor when no detection signal is generated within a predetermined time period required for the motor to rotate one complete rotation.

REFERENCES:
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patent: 4124312 (1978-11-01), Johnson
patent: 4127335 (1978-11-01), Bogert et al.
patent: 4324496 (1982-04-01), Link
patent: 4362980 (1982-12-01), Itzkowitz
patent: 4389129 (1983-06-01), Sugiura
patent: 4398837 (1983-08-01), Torii et al.
patent: 4469454 (1984-09-01), Crean
patent: 4512676 (1985-04-01), Johannson

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