US3578129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for positioning carriages of business machines
Assignee: Mitsubishi Electric Corp
•
Filing: 1968-07-22
•
Granted: 1971-05-11
•
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 15:05
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.
References Cited (Backward Citations)
US2597162A
Cited
US1873235A
Cited
US2018368A
Cited
US2153193A
Cited
US2900066A
Cited
US2954860A
Cited
US2953231A
Cited
US2988193A
Cited
GB1074329A
Cited
US3434581A
Cited
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 |