US3290685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Omni-range doppler beacons and direction finding systems
Assignee: International Standard Electric Corp
•
Filing: 1964-03-06
•
Granted: 1966-12-06
•
Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Steiner Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:17
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/38; G01S1/40; G01S3/00; G01S3/02; G01S3/14; G01S3/52; G01S3/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN AN OMNI-RANGE DOPPLER RADIO NAVIGATION SYSTEM, A BEACON FROM WHICH AN AIRCRAFT CAH DERIVE ITS AZIMUTH AND ELEVATION ANGLES, COMPRISING FIRST MEANS TO STIMULATE THE MOTION OF A SINGLE ANTENNA ACROSS SEVERAL WAVELENGTHS IN A VERTICAL DIRECTION AT A FIRST FREQUENCY, MEANS FOR EXCITING SAID FIRST MEANS WITH A FIRST RF ENERGY, SECOND MEANS TO SIMULATE THE MOTION IN A HORIZONTAL DIRECTION OF A SINGLE ANTENNA IN A CIRCLE HAVING A DIAMETER OF SEVERAL WAVELENGTHS AT A SECOND FREQUENCY, MEANS FOR EXCITING SAID SECOND MEANS WITH A SECOND RF ENERGY, SO THAT THE RF ENERGY AT SAID FIRST AND SECOND MEANS IS FREQUENCY MODULATED AT SAID FIRST AND SECOND FREQUENCIES, AND THIRD MEANS FOR TRANSMITTING A REFERENCE SIGNAL, WHEREBY AZIMUTH IS DERIVED AT AN AIRCRAFT BY COMPARING THE PHASE POSITION OF THE FREQUENCY MODULATION FROM SAID SECOND MEANS WITH SAID REFERENCE SIGNAL, AND ANGLE OF ELEVATION IS DERIVED AT AN AIRCRAFT BY THE RATIO OF THE FREQUENCY DEVIATIONS OF SAID FIRST AND SECOND FREQUENCIES.
Claim 2
Dependent Claim
165 words
IN AN OMNI-RANGE DOPPLER RADIO NAVIGATION SYSTEM, A BEACON FROM WHICH AN AIRCRAFT CAH DERIVE ITS AZIMUTH AND ELEVATION ANGLES, COMPRISING FIRST MEANS TO STIMULATE THE MOTION OF A SINGLE ANTENNA ACROSS SEVERAL WAVELENGTHS IN A VERTICAL DIRECTION AT A FIRST FREQUENCY, MEANS FOR EXCITING SAID FIRST MEANS WITH A FIRST RF ENERGY, SECOND MEANS TO SIMULATE THE MOTION IN A HORIZONTAL DIRECTION OF A SINGLE ANTENNA IN A CIRCLE HAVING A DIAMETER OF SEVERAL WAVELENGTHS AT A SECOND FREQUENCY, MEANS FOR EXCITING SAID SECOND MEANS WITH A SECOND RF ENERGY, SO THAT THE RF ENERGY AT SAID FIRST AND SECOND MEANS IS FREQUENCY MODULATED AT SAID FIRST AND SECOND FREQUENCIES, AND THIRD MEANS FOR TRANSMITTING A REFERENCE SIGNAL, WHEREBY AZIMUTH IS DERIVED AT AN AIRCRAFT BY COMPARING THE PHASE POSITION OF THE FREQUENCY MODULATION FROM SAID SECOND MEANS WITH SAID REFERENCE SIGNAL, AND ANGLE OF ELEVATION IS DERIVED AT AN AIRCRAFT BY THE RATIO OF THE FREQUENCY DEVIATIONS OF SAID FIRST AND SECOND FREQUENCIES.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |