US3171127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio navigation apparatus
Assignee: Individual
•
Filing: 1962-10-02
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Granted: 1965-02-23
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Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 Asteraki John Dimitri
- 👤 Barnard Charles Reginal Nowell
- 👤 Beresford Aden Noel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:19
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
RADIO NAVIGATION APPARATUS FOR OBTAINING A MEASURE OF THE DISTANCE TRAVELED BY A MOBILE CRAFT WITH RESPECT TO A TRANSMITTER OF HIGH FREQUENVY STABILITY COMPRISING: A HIGH STABILITY REFERENCE OSCILLATOR MEANS FOR GENERATING A REFERENCE SIGNAL; A SUPERHETERODYNE TYPE RECEIVER HAVING A FIRST CHANNEL FOR RECEIVING A FIRST SIGNAL FROM SAID TRANSMITTER AND A SECOND CHANNEL FOR RECEIVING A SECOND SIGNAL FROM SAID REFERENCE OSCILLATOR, SAID FIRST AND SECOND CHANNELS BEING CLOSELY SIMILAR WHEREBY ANY PHASE DISTURBANCES OF THE SIGNALS THERIN ARE ALSO CLOSELY SIMILAR; A MIXER STAGE IN EACH OF SAID CHANNELS; A LOCAL OSCILLATOR COMMON TO EACH SAID MIXER STAGE; PHASE DETECTOR MEANS FED RESPECTIVELY FROM SAID FIRST AND SECOND CHANNELS OF THE RECEIVER AND AFFORDING AN OUTPUT DEPENDENT UPON THE PHASE DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS; AND A TEMPERATURE CONTROLLED OVEN ENCLOSING AT LEAST THOSE TEMPERATURE-SENSITIVE COMPONENTS OF SAID FIRST AND SECOND CHANNELS WHICH HAVE AN EFFECT ON THE PHASES OF THE SIGNALS PASSING THROUGH SAID CHANNELS.
Claim 2
Dependent Claim
162 words
RADIO NAVIGATION APPARATUS FOR OBTAINING A MEASURE OF THE DISTANCE TRAVELED BY A MOBILE CRAFT WITH RESPECT TO A TRANSMITTER OF HIGH FREQUENVY STABILITY COMPRISING: A HIGH STABILITY REFERENCE OSCILLATOR MEANS FOR GENERATING A REFERENCE SIGNAL; A SUPERHETERODYNE TYPE RECEIVER HAVING A FIRST CHANNEL FOR RECEIVING A FIRST SIGNAL FROM SAID TRANSMITTER AND A SECOND CHANNEL FOR RECEIVING A SECOND SIGNAL FROM SAID REFERENCE OSCILLATOR, SAID FIRST AND SECOND CHANNELS BEING CLOSELY SIMILAR WHEREBY ANY PHASE DISTURBANCES OF THE SIGNALS THERIN ARE ALSO CLOSELY SIMILAR; A MIXER STAGE IN EACH OF SAID CHANNELS; A LOCAL OSCILLATOR COMMON TO EACH SAID MIXER STAGE; PHASE DETECTOR MEANS FED RESPECTIVELY FROM SAID FIRST AND SECOND CHANNELS OF THE RECEIVER AND AFFORDING AN OUTPUT DEPENDENT UPON THE PHASE DIFFERENCE BETWEEN SAID FIRST AND SECOND SIGNALS; AND A TEMPERATURE CONTROLLED OVEN ENCLOSING AT LEAST THOSE TEMPERATURE-SENSITIVE COMPONENTS OF SAID FIRST AND SECOND CHANNELS WHICH HAVE AN EFFECT ON THE PHASES OF THE SIGNALS PASSING THROUGH SAID CHANNELS.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |