US3274599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio direction finder system
Assignee: Individual
•
Filing: 1952-02-21
•
Granted: 1966-09-20
•
Expires: 1972-02-21
Abstract
No abstract record available.
Inventors
- 👤 Robert M Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:01
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A SYSTEM FOR DETERMINING THE AZIMUTH OF A VEHICLE RELATIVE TO A REFERENCE POINT COMPRISING TRANSMITTER MEANS FOR GENERATING AN OUTPUT SIGNAL OF RANDOM FREQUENCY COMPOSITION, FIRST AND SECOND RESPECTIVE ANTENNA MEANS FOR RADIATING SIGNALS FROM SAID REFERENCE POINT IN RESPECTIVE DIRECTIVE PATTERNS HAVING ANGULARLY OVERLAPPING LOBES WHOSE ANGLE OF OVERLAP DEFINES A SELECTED AZIMUTHAL SECTOR, MEANS SUPPLYING SAID FIRST TRANSMITTER OUTPUT SIGNAL SIGNALS EACH IDENTICAL TO SAID TRANSMITTER OUTPUT SIGNAL AND HAVING A FIRST TIME SPACING, MEANS SUPPLYING SAID SECOND ANTENNA WITH A PAIR OF SIGNALS EACH IDENTICAL TO SAID TRANSMITTER OUTPUT SIGNAL BUT HAVING A SECOND TIME SPACING, WHEREUPON THE RADIATION PATTERNS OF SAID TWO ANTENNAS ARE IDENTIFIABLE BY THE TIME SPACING OF THE SIGNALS IN A PAIR, RECEIVING MEANS IN SAID VEHICLE FOR RECEIVING EACH OF SAID PAIRS OF SIGNALS AND DERIVING A RESPECTIVE OUTPUT VOLTAGE PROPORTIONAL TO THE AMPLITUDE OF THE SIGNALS IN EACH OF SAID RESPECTIVE PAIRS, AND MEANS FOR COMPARING SAID RESPECTIVE OUTPUT VOLTAGES TO DETERMINE THE RELATIVE AZIMUTHAL POSITION OF SAID VEHICLE WITHIN SAID SELECTED AZIMUTHAL SECTOR.
Claim 2
Independent Claim
174 words
A SYSTEM FOR DETERMINING THE AZIMUTH OF A VEHICLE RELATIVE TO A REFERENCE POINT COMPRISING TRANSMITTER MEANS FOR GENERATING AN OUTPUT SIGNAL OF RANDOM FREQUENCY COMPOSITION, FIRST AND SECOND RESPECTIVE ANTENNA MEANS FOR RADIATING SIGNALS FROM SAID REFERENCE POINT IN RESPECTIVE DIRECTIVE PATTERNS HAVING ANGULARLY OVERLAPPING LOBES WHOSE ANGLE OF OVERLAP DEFINES A SELECTED AZIMUTHAL SECTOR, MEANS SUPPLYING SAID FIRST TRANSMITTER OUTPUT SIGNAL SIGNALS EACH IDENTICAL TO SAID TRANSMITTER OUTPUT SIGNAL AND HAVING A FIRST TIME SPACING, MEANS SUPPLYING SAID SECOND ANTENNA WITH A PAIR OF SIGNALS EACH IDENTICAL TO SAID TRANSMITTER OUTPUT SIGNAL BUT HAVING A SECOND TIME SPACING, WHEREUPON THE RADIATION PATTERNS OF SAID TWO ANTENNAS ARE IDENTIFIABLE BY THE TIME SPACING OF THE SIGNALS IN A PAIR, RECEIVING MEANS IN SAID VEHICLE FOR RECEIVING EACH OF SAID PAIRS OF SIGNALS AND DERIVING A RESPECTIVE OUTPUT VOLTAGE PROPORTIONAL TO THE AMPLITUDE OF THE SIGNALS IN EACH OF SAID RESPECTIVE PAIRS, AND MEANS FOR COMPARING SAID RESPECTIVE OUTPUT VOLTAGES TO DETERMINE THE RELATIVE AZIMUTHAL POSITION OF SAID VEHICLE WITHIN SAID SELECTED AZIMUTHAL SECTOR.
References Cited (Backward Citations)
US2429630A
Cited
US2444445A
Cited
US2450005A
Cited
US2449982A
Cited
US2492137A
Cited
US2539905A
Cited
US2531425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |