US3770946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for automatic control with time varying tuning
Assignee: Leeds and Northrup Co
•
Filing: 1971-02-25
•
Granted: 1973-11-06
•
Expires: 1991-02-25
Abstract
Abstract A VELOCITY ALOGRITHM WHICH PROVIDES FOR PROPORTIONAL, RESET AND RATE CONTROL FUNCTIONS WITHOUT ANY RESULTING LOSS OF INFORMATION UNDER CONDITIONS INVOLVING THE VARIATION OF THE TUNING CONSTANTS. THE PROPORTIONAL COMPONENT IS SEPARATELY COMPUTED AS THE CHANGE WITH TIME OF THE PRODUCT OF THE PROPORTIONAL GAIN AND THE CONTROL ERROR. THE RESET COMPONENT IS SEPARATELY COMPUTED AS THE PRODUCT OF THE RESET GAIN AND THE CONTROL ERROR WHILE THE RATE COMPONENT IS ALSO SEPARATELY COMPUTED AS THE CHANGE WITH TIME OF THE PRODUCT OF THE RATE GAIN AND THE CHANGE OF THE CONTROL ERROR WITH TIME.
Inventors
- 👤 H Fertik
- 👤 C Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/66; G05; G05B; G05B11/00; G05B11/01; G05B11/36; G05B11/42
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |