US3081422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator controlled servosystem
Assignee: Garrett Corp
•
Filing: 1959-05-08
•
Granted: 1963-03-12
•
Expires: 1979-05-08
Abstract
No abstract record available.
Inventors
- 👤 Rollin A Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:08
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2453
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
AN ELECTRONIC CIRCUIT INCLUDING AN EXCITABLE ELECTRON DEVICE HAVING INPUT AND OUTPUT ELECTRODES COMPRISING: FIRST CIRCUIT MEANS INCLUDING A PAIR OF SERIES CONNECTED IMPEDANCE ELEMENTS COUPLED WITH SAID INPUT ELECTRODE; SECOND TUNED CIRCUIT MEANS INCLUDING A PAIR OF CONDUCTORS COUPLING SAID OUTPUT ELECTRODE WITH SAID SERIES CONNECTED IMPEDANCE ELEMENTS AND WITH SAID INPUT ELECTRODE, SAID CONDUCTORS BEING COUPLED TO SAID OUTPUT ELECTRODE 180* OUT OF PHASE WITH EACH OTHER; FIRST MEANS FOR SWITCHING THE COUPLING OF SAID CONDUCTORS WITH SAID FIRST CIRCUIT MEANS AND SAID INPUT ELECTRODE; SERVO MEANS FOR EFFECTIVELY VARYING ONE OF SAID IMPEDANCE ELEMENTS, SAID SERVO MEANS HAVING A PAIR OF DIRECTIONAL SENSE INPUTS COUPLED WITH SAID OUTPUT ELECTRODE; AND SECOND MEANS FOR SWITCHING SAID DIRECTIONAL SENSE INPUTS OF SAID SERVO MEANS WITH SAID OUTPUT ELECTRODE SIMULTANEOUSLY WITH SAID FIRST SWITCHING MEANS, SAID SERVO MEANS OPERATING TO REDUCE TO ZERO THE FEEDBACK FROM SAID OUTPUT ELECTRODE THROUGH SAID SECOND CIRCUIT MEANS WHEREBY THE SIGNAL EXCITATION AT SAID INPUT ELECTRODE IS REDUCED TO SUBSTANTIALLY ZERO.
Claim 2
Dependent Claim
167 words
AN ELECTRONIC CIRCUIT INCLUDING AN EXCITABLE ELECTRON DEVICE HAVING INPUT AND OUTPUT ELECTRODES COMPRISING: FIRST CIRCUIT MEANS INCLUDING A PAIR OF SERIES CONNECTED IMPEDANCE ELEMENTS COUPLED WITH SAID INPUT ELECTRODE; SECOND TUNED CIRCUIT MEANS INCLUDING A PAIR OF CONDUCTORS COUPLING SAID OUTPUT ELECTRODE WITH SAID SERIES CONNECTED IMPEDANCE ELEMENTS AND WITH SAID INPUT ELECTRODE, SAID CONDUCTORS BEING COUPLED TO SAID OUTPUT ELECTRODE 180* OUT OF PHASE WITH EACH OTHER; FIRST MEANS FOR SWITCHING THE COUPLING OF SAID CONDUCTORS WITH SAID FIRST CIRCUIT MEANS AND SAID INPUT ELECTRODE; SERVO MEANS FOR EFFECTIVELY VARYING ONE OF SAID IMPEDANCE ELEMENTS, SAID SERVO MEANS HAVING A PAIR OF DIRECTIONAL SENSE INPUTS COUPLED WITH SAID OUTPUT ELECTRODE; AND SECOND MEANS FOR SWITCHING SAID DIRECTIONAL SENSE INPUTS OF SAID SERVO MEANS WITH SAID OUTPUT ELECTRODE SIMULTANEOUSLY WITH SAID FIRST SWITCHING MEANS, SAID SERVO MEANS OPERATING TO REDUCE TO ZERO THE FEEDBACK FROM SAID OUTPUT ELECTRODE THROUGH SAID SECOND CIRCUIT MEANS WHEREBY THE SIGNAL EXCITATION AT SAID INPUT ELECTRODE IS REDUCED TO SUBSTANTIALLY ZERO.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |