US3312972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tacan azimuth calibration technique
Assignee: Collins Radio Co
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Filing: 1965-10-20
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Granted: 1967-04-04
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Orville J Alitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:12
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
IN A MONITORING SYSTEM FOR A COMPOSITE VIDEO SIGNAL OF THE TYPE COMPRISING AN AMPLITUDE MODULATED PULSE TRAIN INCLUDING PERIODIC REFERENCE BURSTS OF PULSES WHEREIN INFORMATION IS CONVEYED IN THE FORM OF THE VARIABLE PHASE OF THE AMPLITUDE MODULATION ENVELOPE COMPARED TO THE TIME OCCURRENCE OF SAID REFERENCE BURST OF PULSES, SAID MONITORING SYSTEM COMPRISING FIRST SIGNAL PROCESSING MEANS FOR GENERATING A FIRST SIGNAL CORRESPONDING TO THE TIME OCCURRENCE OF SAID REFERENCE BURST OF PULSES, SECOND SIGNAL PROCESSING MEANS DEVELOPING A SECOND SIGNAL PROPORTIONAL TO A PARTICULAR ZERO CROSS-OVER OF THE MODULATION ENVELOPE OF SAID TRAIN OF PULSES, SIGNAL COMPARISON MEANS RECEIVING SAID FIRST AND SECOND SIGNALS AND DEVELOPING AN OUTPUT SIGNAL THE AMPLITUDE OF WHICH IS PROPORTIONAL TO THE TIME CORRESPONDENCE BETWEEN SAID FIRST AND SECOND SIGNAL; MEANS FOR CALIBRATING SAID MONITORING SYSTEM COMPRISING AN EXTERNAL SOURCE OF REFERENCE SIGNAL AT A FREQUENCY CORRESPONDING TO THE AMPLITUDE MODULATION COMPONENT OF SAID COMPOSITE SIGNAL, THIRD SIGNAL PROCESSING MEANS RECEIVING SAID COMPOSITE SIGNAL AND REMOVING THE AMPLITUDE MODULATION THEREFROM TO PROVIDE A TRAIN OF CONSTANT AMPLITUDE PULSES, MODULATING MEANS RECEIVING SAID CONSTANT AMPLITUDE PULSES AND SAID REFERENCE SIGNAL AND AMPLITUDE MODULATING SAID PULSES AT
Claim 2
Dependent Claim
193 words
IN A MONITORING SYSTEM FOR A COMPOSITE VIDEO SIGNAL OF THE TYPE COMPRISING AN AMPLITUDE MODULATED PULSE TRAIN INCLUDING PERIODIC REFERENCE BURSTS OF PULSES WHEREIN INFORMATION IS CONVEYED IN THE FORM OF THE VARIABLE PHASE OF THE AMPLITUDE MODULATION ENVELOPE COMPARED TO THE TIME OCCURRENCE OF SAID REFERENCE BURST OF PULSES, SAID MONITORING SYSTEM COMPRISING FIRST SIGNAL PROCESSING MEANS FOR GENERATING A FIRST SIGNAL CORRESPONDING TO THE TIME OCCURRENCE OF SAID REFERENCE BURST OF PULSES, SECOND SIGNAL PROCESSING MEANS DEVELOPING A SECOND SIGNAL PROPORTIONAL TO A PARTICULAR ZERO CROSS-OVER OF THE MODULATION ENVELOPE OF SAID TRAIN OF PULSES, SIGNAL COMPARISON MEANS RECEIVING SAID FIRST AND SECOND SIGNALS AND DEVELOPING AN OUTPUT SIGNAL THE AMPLITUDE OF WHICH IS PROPORTIONAL TO THE TIME CORRESPONDENCE BETWEEN SAID FIRST AND SECOND SIGNAL; MEANS FOR CALIBRATING SAID MONITORING SYSTEM COMPRISING AN EXTERNAL SOURCE OF REFERENCE SIGNAL AT A FREQUENCY CORRESPONDING TO THE AMPLITUDE MODULATION COMPONENT OF SAID COMPOSITE SIGNAL, THIRD SIGNAL PROCESSING MEANS RECEIVING SAID COMPOSITE SIGNAL AND REMOVING THE AMPLITUDE MODULATION THEREFROM TO PROVIDE A TRAIN OF CONSTANT AMPLITUDE PULSES, MODULATING MEANS RECEIVING SAID CONSTANT AMPLITUDE PULSES AND SAID REFERENCE SIGNAL AND AMPLITUDE MODULATING SAID PULSES AT
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |