Patent US3578129A successfully refreshed from Google Patents.
US3578129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for positioning carriages of business machines
Assignee: Mitsubishi Electric Corp
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Filing: 1968-07-22
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Granted: 1971-05-11
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Expires: 1988-07-22
Abstract
Abstract A control device for positioning a carriage of a business machine such as an accounting machine or a typewriter comprises means to detect the present position of the carriage, means to compare a signal produced by the detecting means with a position signal representing a predetermined carriage position a driving means driven by a command signal to drive the carriage, means driven by a command signal to fixedly locate the carriage, a braking means driven by a command signal to apply a braking force to the carriage and a control means to generate said position signal and to selectively send a control signal to respective ones of said detecting means, comparing means, driving means, locating means and braking means, to locate the carriage in a desired final position.
Inventors
- 👤 Yoshiaki Kato
- 👤 Hideya Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/74; B41J19/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
160 words
A control device for positioning a carriage of a business machine comprising: driving means responsive to command signals for driving said carriage, said driving means developing first and second driving torques of different value; position detecting means coupled to said carriage for providing signals representative of the actual position of said carriage; braking means responsive to a braking signal for applying a braking force to said carriage; locating means operable after said braking force is applied for fixedly locating said carriage at a given position; means providing a signal representing a desired stopping position of said carriage; comparator means for comparing the output of said position detecting means with said signal representing a desired stopping position; and control means responsive to the output of said comparator means to generate said command signals, said braking signal, and a signal operating said locating means, for operating said locating means only when said driving means is not operating at its high torque value.
Claim 2
Dependent Claim
160 words
A control device for positioning a carriage of a business machine comprising: driving means responsive to command signals for driving said carriage, said driving means developing first and second driving torques of different value; position detecting means coupled to said carriage for providing signals representative of the actual position of said carriage; braking means responsive to a braking signal for applying a braking force to said carriage; locating means operable after said braking force is applied for fixedly locating said carriage at a given position; means providing a signal representing a desired stopping position of said carriage; comparator means for comparing the output of said position detecting means with said signal representing a desired stopping position; and control means responsive to the output of said comparator means to generate said command signals, said braking signal, and a signal operating said locating means, for operating said locating means only when said driving means is not operating at its high torque value.
Claim 3
Dependent Claim
22 words
A control device according to claim 1 wherein said control means provides said signal representing a desired stopping position of said carriage.
Claim 4
Dependent Claim
42 words
A control device according to claim 1 wherein said position detecting means includes a code board mounted on said carriage for encoding positions of said carriage, and means responsive to said code board to generate signals representing the positions of said carriage.
Claim 5
Dependent Claim
19 words
A control device according to claim 3 wherein said means responsive to said code board includes a photoelectric element.
Claim 6
Dependent Claim
27 words
A control device according to claim 1 wherein said locating means includes a ratchet and pawl mechanism coupled to said carriage and operable by said control means.
Claim 7
Dependent Claim
16 words
A control device according to claim 1 wherein said braking means is an electromagnetic braking means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |