Patent US3280317A successfully refreshed from Google Patents.
US3280317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Root locus plotter
Assignee: RTX Corp
•
Filing: 1962-09-14
•
Granted: 1966-10-18
•
Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 Adams Don Luis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:41
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
APPARATUS FOR DETERMING THE LOCI OF POSSIBLE ROOTS OF THE CLOSED LOOP FREQUENCY RESPONSE FUNCTION OF A SERVO SYSTEM FROM THE POLE SINGULARITIES AND ZERO SINGULARITIES OF THE OPEN LOOP TRANSFER FUNCTION OF THE SYSTEM INCLUDING IN COMBINATION A PLURALITY OF SIGNAL PRODUCING DEVICES EACH HAVING AN ORIENTABLE ELEMENT, MEANS FOR POSITIONING SAID DEVICES AT LOCATIONS CORRESPONDING TO SAID SINGULARITIES, MEANS FOR ORIENTING SAID ELEMENTS TOWARD A POINT UNDER EXAMINATION TO CAUSE SAID DEVICES TO PRODUCE OUTPUT SIGNALS AND MEANS FOR ALGEBRAICALLY SUMMING SAID OUTPUT SIGNALS IN ACCORDANCE AS SAID DEVICES ARE POSITIONED AT POLE SINGULARITIES AND ZERO SINGULARITIES TO PRODUCE A SIGNAL INDICATING THAT SAID POINT IS THE LOCUS OF A POSSIBLE ROOT.
Claim 2
Dependent Claim
114 words
APPARATUS FOR DETERMING THE LOCI OF POSSIBLE ROOTS OF THE CLOSED LOOP FREQUENCY RESPONSE FUNCTION OF A SERVO SYSTEM FROM THE POLE SINGULARITIES AND ZERO SINGULARITIES OF THE OPEN LOOP TRANSFER FUNCTION OF THE SYSTEM INCLUDING IN COMBINATION A PLURALITY OF SIGNAL PRODUCING DEVICES EACH HAVING AN ORIENTABLE ELEMENT, MEANS FOR POSITIONING SAID DEVICES AT LOCATIONS CORRESPONDING TO SAID SINGULARITIES, MEANS FOR ORIENTING SAID ELEMENTS TOWARD A POINT UNDER EXAMINATION TO CAUSE SAID DEVICES TO PRODUCE OUTPUT SIGNALS AND MEANS FOR ALGEBRAICALLY SUMMING SAID OUTPUT SIGNALS IN ACCORDANCE AS SAID DEVICES ARE POSITIONED AT POLE SINGULARITIES AND ZERO SINGULARITIES TO PRODUCE A SIGNAL INDICATING THAT SAID POINT IS THE LOCUS OF A POSSIBLE ROOT.
References Cited (Backward Citations)
US2989238A
Cited
US3054561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |