Patent US3303502A successfully refreshed from Google Patents.
US3303502A
Expired / Lapsed
US
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Hyperbolic continuous wave position finding system including ambiguity resolution
Assignee: Seismograph Service Corp
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Filing: 1964-04-22
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Granted: 1967-02-07
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Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 Edward H Mahoney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:09
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/20; G01S1/30; G01S1/304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A TRANSMITTING SYSTEM FOR USE IN RADIO LOCATION SYSTEMS OF THE HYPERBOLIC CONTINUOUS WAVE TYPE AND COMPRISING A PAIR OF SPACED APART TRANSMITTING UNITS EACH INCLUDING MEANS FOR GENERATING A POSITION INDICATING SIGNAL AND MEANS FOR GENERATING AT LEAST ONE AMBIGUITY RESOLUTION SIGNAL, SWITCHING MEANS AT EACH OF SAID UNITS FOR ALTERNATELY RADIATING THE POSITION INDICATING SIGNAL AND THE AMBIGUITY RESOLUTION SIGNAL FROM THAT UNIT, THE SWITCHING MEANS AT THE TWO UNITS BEING OPERATED INDEPENDENTLY OF EACH OTHER AND AT DIFFERENT SWITCHING RATES, A FIXEDLY POSITIONED REFERENCE STATION FOR RECEIVING AND HETERODYNING THE TWO AMBIGUITY RESOLUTION SIGNALS TO DEVELOP A FIRST BEAT SIGNAL AND FOR RECEIVING AND HETERODYNING IN PAIRS THE TWO POSITION INDICATING SIGNALS TO DEVELOP A SECOND BEAT SIGNAL, MEANS AT SAID REFERENCE STATION FOR GENERATING AND RADIATING A CARRIER WAVE, AND MEANS FOR RADIATING FIRST AND SECOND REFERENCE SIGNALS RESPECTIVELY DERIVED FROM SAID FIRST AND SECOND BEAT SIGNALS.
Claim 2
Dependent Claim
151 words
A TRANSMITTING SYSTEM FOR USE IN RADIO LOCATION SYSTEMS OF THE HYPERBOLIC CONTINUOUS WAVE TYPE AND COMPRISING A PAIR OF SPACED APART TRANSMITTING UNITS EACH INCLUDING MEANS FOR GENERATING A POSITION INDICATING SIGNAL AND MEANS FOR GENERATING AT LEAST ONE AMBIGUITY RESOLUTION SIGNAL, SWITCHING MEANS AT EACH OF SAID UNITS FOR ALTERNATELY RADIATING THE POSITION INDICATING SIGNAL AND THE AMBIGUITY RESOLUTION SIGNAL FROM THAT UNIT, THE SWITCHING MEANS AT THE TWO UNITS BEING OPERATED INDEPENDENTLY OF EACH OTHER AND AT DIFFERENT SWITCHING RATES, A FIXEDLY POSITIONED REFERENCE STATION FOR RECEIVING AND HETERODYNING THE TWO AMBIGUITY RESOLUTION SIGNALS TO DEVELOP A FIRST BEAT SIGNAL AND FOR RECEIVING AND HETERODYNING IN PAIRS THE TWO POSITION INDICATING SIGNALS TO DEVELOP A SECOND BEAT SIGNAL, MEANS AT SAID REFERENCE STATION FOR GENERATING AND RADIATING A CARRIER WAVE, AND MEANS FOR RADIATING FIRST AND SECOND REFERENCE SIGNALS RESPECTIVELY DERIVED FROM SAID FIRST AND SECOND BEAT SIGNALS.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |