US3216009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement or control of the altitude of aircraft
Assignee: Ripper Robots Ltd
•
Filing: 1962-09-04
•
Granted: 1965-11-02
•
Expires: 1982-09-04
Abstract
No abstract record available.
Inventors
- 👤 Thomason Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:40
CPC Classifications
G; G01; G01C; G01C5/00; G01C5/005; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A SYSTEM FOR MAINTAING AN AIRCRAFT AT A CONSTANT LOW ALTITUDE COMPRISING AN OSCILLATOR ADJUSTED NORMALLY TO GENERATE OSCILLATIONS HAVING A WAVELENGTH $ SO SELECTED THAT THE SAID CONSTANT ALTITUDE IS EQUAL TO A LOW ORDER MULTIPLE OF $/2, AN ANTENNA FOR RADIATING THE OSCILLATIONS, TOWARDS THE GROUND, MEANS RESPONSIVE TO CHANGE THE WAVELENGTH OF THE OSCILLATIONS CONSEQUENT TO A DEPARTURE OF THE AIRCRAFT FROM THE DESIRED ALTITUDE FOR GENERATING ERROR SIGNALS INCLUDING A TRANSMISSION LINE CONNECTING SAID OSCILLATOR AND SAID ANTENNA, SAID LINE BEING MISMATCHED TO SAID ANTENNA AT THE NORMAL OPERATING WAVELENGTH, AND MEANS FOR APPLYING SAID ERROR SIGNALS TO RESTORE THE AIRCRAFT TO THE DESIRED ALTITUDE.
Claim 2
Independent Claim
109 words
A SYSTEM FOR MAINTAING AN AIRCRAFT AT A CONSTANT LOW ALTITUDE COMPRISING AN OSCILLATOR ADJUSTED NORMALLY TO GENERATE OSCILLATIONS HAVING A WAVELENGTH $ SO SELECTED THAT THE SAID CONSTANT ALTITUDE IS EQUAL TO A LOW ORDER MULTIPLE OF $/2, AN ANTENNA FOR RADIATING THE OSCILLATIONS, TOWARDS THE GROUND, MEANS RESPONSIVE TO CHANGE THE WAVELENGTH OF THE OSCILLATIONS CONSEQUENT TO A DEPARTURE OF THE AIRCRAFT FROM THE DESIRED ALTITUDE FOR GENERATING ERROR SIGNALS INCLUDING A TRANSMISSION LINE CONNECTING SAID OSCILLATOR AND SAID ANTENNA, SAID LINE BEING MISMATCHED TO SAID ANTENNA AT THE NORMAL OPERATING WAVELENGTH, AND MEANS FOR APPLYING SAID ERROR SIGNALS TO RESTORE THE AIRCRAFT TO THE DESIRED ALTITUDE.
References Cited (Backward Citations)
US1756462A
Cited
US1969537A
Cited
US2042490A
Cited
US2499349A
Cited
US2705319A
Cited
US2568568A
Cited
US2911639A
Cited
US2965894A
Cited
US3191171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |