US3118097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional motor drive control
Assignee: Siemens Schuckertwerke AG
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Filing: 1960-09-06
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Granted: 1964-01-14
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Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Hettler Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:37
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN MOTOR SPEED CONTROL APPARATUS OPERATIVE WITH AT LEAST A FIRST MOTOR AND A SECOND MOTOR FOR MAINTAINING A PREDETERMINED SPEED RELATIONSHIP BETWEEN SAID MOTORS, THE COMBINATION OF ANALOG SIGNAL PROVIDING MEANS OPERATIVE WITH SAID MOTORS FOR PROVIDING FIRST AND SECOND ANALOG SIGNALS IN ACCORDANCE WITH THE RESPECTIVE SPEEDS OF SAID MOTORS, ANALOG SPEED CONTROL MEANS RESPONSIVE TO SAID FIRST AND SECOND ANALOG SIGNALS FOR CONTROLLING THE SPEED OF THE SECOND MOTOR IN ACCORDANCE WITH THE SPEED OF THE FIRST MOTOR, DIGITAL SIGNAL PROVIDING MEANS OPERATIVE WITH SAID MOTORS FOR PROVIDING FIRST AND SECOND DIGITAL SIGNALS IN ACCORDANCE WITH THE RESPECTIVE SPEEDS OF SAID MOTORS, DIGITAL SPEED CONTROL MEANS RESPONSIVE TO SAID FIRST AND SECOND DIGITAL SIGNALS FOR CONTROLLING THE SPEED OF THE SECOND MOTOR IN ACCORDANCE WITH A PREDETERMINED RELATIONSHIP BETWEEN SAID FIRST AND SECOND DIGITAL SIGNALS, AND CONTROL MEANS RESPONSIVE TO A PREDETERMINED CHANGE IN THE OPERATION OF SAID ANALOG SPEED CONTROL MEANS FOR PREVENTING THE CONTROL OF THE SECOND MOTOR SPEED BY SAID DIGITAL SPEED CONTROL MEANS WHILE SAID CHANGE IS BEING MADE.
Claim 2
Dependent Claim
176 words
IN MOTOR SPEED CONTROL APPARATUS OPERATIVE WITH AT LEAST A FIRST MOTOR AND A SECOND MOTOR FOR MAINTAINING A PREDETERMINED SPEED RELATIONSHIP BETWEEN SAID MOTORS, THE COMBINATION OF ANALOG SIGNAL PROVIDING MEANS OPERATIVE WITH SAID MOTORS FOR PROVIDING FIRST AND SECOND ANALOG SIGNALS IN ACCORDANCE WITH THE RESPECTIVE SPEEDS OF SAID MOTORS, ANALOG SPEED CONTROL MEANS RESPONSIVE TO SAID FIRST AND SECOND ANALOG SIGNALS FOR CONTROLLING THE SPEED OF THE SECOND MOTOR IN ACCORDANCE WITH THE SPEED OF THE FIRST MOTOR, DIGITAL SIGNAL PROVIDING MEANS OPERATIVE WITH SAID MOTORS FOR PROVIDING FIRST AND SECOND DIGITAL SIGNALS IN ACCORDANCE WITH THE RESPECTIVE SPEEDS OF SAID MOTORS, DIGITAL SPEED CONTROL MEANS RESPONSIVE TO SAID FIRST AND SECOND DIGITAL SIGNALS FOR CONTROLLING THE SPEED OF THE SECOND MOTOR IN ACCORDANCE WITH A PREDETERMINED RELATIONSHIP BETWEEN SAID FIRST AND SECOND DIGITAL SIGNALS, AND CONTROL MEANS RESPONSIVE TO A PREDETERMINED CHANGE IN THE OPERATION OF SAID ANALOG SPEED CONTROL MEANS FOR PREVENTING THE CONTROL OF THE SECOND MOTOR SPEED BY SAID DIGITAL SPEED CONTROL MEANS WHILE SAID CHANGE IS BEING MADE.
References Cited (Backward Citations)
US2692360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |