Patent US3553549A successfully refreshed from Google Patents.
US3553549A
Expired / Lapsed
US
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Digital motor control circuit
Assignee: Superior Electric Co
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Filing: 1968-09-11
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Granted: 1971-01-05
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Expires: 1988-09-11
Abstract
Abstract A CIRCUIT FOR TRANSLATING EACH INPUT COMMAND PULSE INTO AN INCREMENTAL STE OF A STEPPING MOTOR IN WHICH THE INPUT PULSES MAY BE INTRODUCED INTO THE CIRCUIT AT ONE FREQUENCY AND THE MOTOR STEPPED AT ANOTHER RATE WITH THE VARIATION BETWEEN THE FREQUENCY AND RATE BEING IN ACCORDANCE WITH THE DIFFERENCE BETWEEN THE NUMBER OF INPUT PULSES AND THE NUMBER OF STEPS AND IN WHICH THE STEPPING RATE IS CONTROLLED TO BE WITHIN THE CAPABILITY OF THE MOTOR TO MOVE ITS LOAD WITHOUT LOSS OR TRANSLATION OF EACH INPUT PULSE INTO A STEP.
Inventors
- 👤 Albert C Leenhouts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:55
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |