US3374480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver tuning for radar and the like
Assignee: Bell Aerospace Corp
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Filing: 1958-08-20
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Granted: 1968-03-19
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Expires: 1978-08-20
Abstract
No abstract record available.
Inventors
- 👤 Charles W Russell
- 👤 Lerner Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:46
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A SYSTEM OF THE CHARACTER DESCRIBED COMPRISING, A PULSE GENERATOR OF THE CAVITY RESONATOR TYPE, A PULSE ECHO RECEIVER HAVING A VOLTAGE TUNABLE LOCAL OSCILLATOR, A FIRST AUTOMATIC FREQUENCY CONTROL CIRCUIT FOR SAID OSCILLATOR COMPRISING THE CAVITY OF SAID GENERATOR AND MEANS INCLUDING A MICROWAVE DISCRIMINATOR TRANSLATING THE RESONANT FREQUENCY OF SAID CAVITY INTO A TUNING CONTROL VOLTAGE FOR SAID LOCAL OSCILLATOR, A SECOND AUTOMATIC FREQUENCY CONTROL CIRCUIT FOR SAID LOCAL OSCILLATOR COMPRISING MEANS INCLUDING A MIXER RECEIVING A SAMPLE OFTHE TRANSMITTED PULSE AND THE OUTPUT OF SAID LOCAL OSCILLATOR FOR DEVELOPING A TUNING CONTROL VOLTAGE FOR SAID LOCAL OSCILLATOR, AND SWITCH MEANS FOR SWITCHING SAID LOCAL OSCILLATOR FROM SAID FIRST AUTOMATIC FREQUENCY CONTROL CIRCUIT TO SAID SECOND AUTOMATIC FREQUENCY CONTROL CIRCUIT WHEN A PULSE IS TRANSMITTED.
Claim 2
Independent Claim
127 words
A SYSTEM OF THE CHARACTER DESCRIBED COMPRISING, A PULSE GENERATOR OF THE CAVITY RESONATOR TYPE, A PULSE ECHO RECEIVER HAVING A VOLTAGE TUNABLE LOCAL OSCILLATOR, A FIRST AUTOMATIC FREQUENCY CONTROL CIRCUIT FOR SAID OSCILLATOR COMPRISING THE CAVITY OF SAID GENERATOR AND MEANS INCLUDING A MICROWAVE DISCRIMINATOR TRANSLATING THE RESONANT FREQUENCY OF SAID CAVITY INTO A TUNING CONTROL VOLTAGE FOR SAID LOCAL OSCILLATOR, A SECOND AUTOMATIC FREQUENCY CONTROL CIRCUIT FOR SAID LOCAL OSCILLATOR COMPRISING MEANS INCLUDING A MIXER RECEIVING A SAMPLE OFTHE TRANSMITTED PULSE AND THE OUTPUT OF SAID LOCAL OSCILLATOR FOR DEVELOPING A TUNING CONTROL VOLTAGE FOR SAID LOCAL OSCILLATOR, AND SWITCH MEANS FOR SWITCHING SAID LOCAL OSCILLATOR FROM SAID FIRST AUTOMATIC FREQUENCY CONTROL CIRCUIT TO SAID SECOND AUTOMATIC FREQUENCY CONTROL CIRCUIT WHEN A PULSE IS TRANSMITTED.
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |