Typewriting machines – Carriage or carriage-moving or movement-regulating mechanism – Carriage-feed mechanism
Patent
1978-03-08
1979-12-04
Wright, Jr., Ernest T.
Typewriting machines
Carriage or carriage-moving or movement-regulating mechanism
Carriage-feed mechanism
400322, 400280, 4001611, 4003141, 4003143, 400903, 400306, B41J 1958
Patent
active
041769775
ABSTRACT:
A drive arrangement for a single element typewriter in which the element is mounted on a moving carrier, for facilitating proportional spacing incremental movements of the carrier. The carrier is bidirectionally driven by a servo motor which rotates bidirectionally in response to the output of a digital counter. The counter counts in one direction in response to input stepping pulses as well as pulses corresponding to incremental rotational movements of the drive shaft in a given direction, and counts in the other direction in response to pulses corresponding to incremental rotational movements of the drive shaft in the opposite direction. The pulses corresponding to incremental rotational movements of the drive shaft are optically derived from a rotating disk having alternating transparent and opaque radial striations. Provision is made for automatic carrier return by setting the output of the counter accordingly.
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patent: 4091316 (1978-05-01), Friedman
patent: 4119383 (1978-10-01), Watanabe et al.
patent: 4119901 (1978-10-01), Leenhouts
Realty & Industrial Corporation
Wright, Jr. Ernest T.
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