US3091740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic tracking circuit
Assignee: Raytheon Co
•
Filing: 1957-06-17
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Granted: 1963-05-28
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Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Jr William M Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:26
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/585; G01S13/586
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A RECEIVER OF INPUT SIGNALS COMPRISING A FREQUENCYCONTROLLED OSCILLATOR, FREQUENCY SCANNING MEANS FOR VARYING THE FREQUENCY OF SAID OSCILLATOR WITHIN A PRESCRIBED RANGE WHEN IN THE FREQUENCY SCANNING CONDITION, FIXED REFERENCE FREQUENCY GENERATOR PRODUCTIVE OF AN AUDIO FREQUENCY, MEANS FOR COMBINING SAID INPUT SIGNAL AND THE OUTPUT OF SAID FREQUENCY-CONTROLLED OSCILLATOR TO DERIVE BEAT FREQUENCY SIGNALS OF FREQUENCY VARYING OVER A GIVEN BAND, AMPLIFIER MEANS RESPONSIVE TO A PORTION OF SAID BEAT FREQUENCY BAND LYING WITHIN AN AUDIO FREQUENCY RANGE, SCAN DISABLING MEANS RESPONSIVE TO OUTPUT ENERGY FROM SAID AMPLIFIER MEANS FOR DISABLING SAID FREQUENCY SCANNING MEANS, A LOW-PASS FILTER SUPPLIED WITH ENERGY FROM SAID AMPLIFIER MEANS AND HAVING AN AUDIO FREQUENCY
Claim 2
Dependent Claim
112 words
A RECEIVER OF INPUT SIGNALS COMPRISING A FREQUENCYCONTROLLED OSCILLATOR, FREQUENCY SCANNING MEANS FOR VARYING THE FREQUENCY OF SAID OSCILLATOR WITHIN A PRESCRIBED RANGE WHEN IN THE FREQUENCY SCANNING CONDITION, FIXED REFERENCE FREQUENCY GENERATOR PRODUCTIVE OF AN AUDIO FREQUENCY, MEANS FOR COMBINING SAID INPUT SIGNAL AND THE OUTPUT OF SAID FREQUENCY-CONTROLLED OSCILLATOR TO DERIVE BEAT FREQUENCY SIGNALS OF FREQUENCY VARYING OVER A GIVEN BAND, AMPLIFIER MEANS RESPONSIVE TO A PORTION OF SAID BEAT FREQUENCY BAND LYING WITHIN AN AUDIO FREQUENCY RANGE, SCAN DISABLING MEANS RESPONSIVE TO OUTPUT ENERGY FROM SAID AMPLIFIER MEANS FOR DISABLING SAID FREQUENCY SCANNING MEANS, A LOW-PASS FILTER SUPPLIED WITH ENERGY FROM SAID AMPLIFIER MEANS AND HAVING AN AUDIO FREQUENCY
References Cited (Backward Citations)
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Cited
US2688743A
Cited
US2776426A
Cited
US2702852A
Cited
US2823313A
Cited
US2852669A
Cited
US2871468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |