US3603885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrographic if preselector
Assignee: United States Department of the Navy
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Filing: 1965-03-30
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Granted: 1971-09-07
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Expires: 1985-03-30
Abstract
Abstract A device for automatically tuning interferometer-type receivers in a space surveillance system comprising receiving means, a comb filter comprising a plurality of channels, each including a filter, and a tuning means connected to each filter.
Inventors
- 👤 Charles A Bartholomew
- 👤 Roger L Easton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/46; G01S7/00; G01S7/02; G01S7/35; G01S7/352
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
In a space surveillance system which includes interferometer-type receivers for receiving signals from satellites, said signals varying In frequency within a predetermined range because of the doppler effect arising from different possible satellite velocities, a device for automatically tuning said receivers comprising: An antenna for receiving said varying frequency signal from said satellite; A filter having a plurality of channels; Means, including at least one stage of frequency reduction, for coupling said antenna to said comb filter; A filter in each of said plurality of energized filter channels, each filter having a different passband contained in said predetermined range, the passbands of said filters being spaced throughout said predetermined range; An oscillator coupled to each filter to be energized by signals passing through said filter, each oscillator operating when energized to produce a different frequency signal which, when applied thereto, tunes said interferometer-type receivers to receive said varying frequency signal and Inhibit circuit means connected to each one of said plurality of channels for preventing the concurrent energization of more than one oscillator.
Claim 2
Dependent Claim
173 words
In a space surveillance system which includes interferometer-type receivers for receiving signals from satellites, said signals varying In frequency within a predetermined range because of the doppler effect arising from different possible satellite velocities, a device for automatically tuning said receivers comprising: An antenna for receiving said varying frequency signal from said satellite; A filter having a plurality of channels; Means, including at least one stage of frequency reduction, for coupling said antenna to said comb filter; A filter in each of said plurality of energized filter channels, each filter having a different passband contained in said predetermined range, the passbands of said filters being spaced throughout said predetermined range; An oscillator coupled to each filter to be energized by signals passing through said filter, each oscillator operating when energized to produce a different frequency signal which, when applied thereto, tunes said interferometer-type receivers to receive said varying frequency signal and Inhibit circuit means connected to each one of said plurality of channels for preventing the concurrent energization of more than one oscillator.
Claim 3
Dependent Claim
87 words
An automatic tuning device comprising: Means for receiving a signal that can vary in frequency within a predetermined range; A comb filter connected to said means for receiving and comprising a plurality of channels, each of said channels including a filter having a different passband contained in said predetermined range, the passbands of said filters being spaced throughout said predetermined range and A tuning means connected to each filter to be energized by signals passing through said filter to tune a receiver to receive said frequency-varying signal.
Claim 4
Dependent Claim
87 words
An automatic tuning device comprising: Means for receiving a signal that can vary in frequency within a predetermined range; A comb filter connected to said means for receiving and comprising a plurality of channels, each of said channels including a filter having a different passband contained in said predetermined range, the passbands of said filters being spaced throughout said predetermined range and A tuning means connected to each filter to be energized by signals passing through said filter to tune a receiver to receive said frequency-varying signal.
Claim 5
Dependent Claim
25 words
An automatic tuning device as set forth in claim 2 wherein each of said tuning means is an oscillator which operates at a different frequency.
Claim 6
Dependent Claim
23 words
An automatic turning device as set forth in claim 3 wherein said means for receiving includes at least one stage of frequency reduction.
Claim 7
Dependent Claim
129 words
In a space surveillance system which includes interferometer-type receivers for receiving signals from satellites, said signals varying in frequency within a predetermined range because of the doppler effect arising from different possible satellite velocities, a device for automatically tuning said receivers comprising: An antenna for receiving said varying frequency signal from said satellite; A comb filter having a plurality of channels; Means coupling said antenna and said comb filter; A filter in each of said plurality of comb filter channels, each filter having a different passband contained in said predetermined range, the passbands of said filters being spaced throughout said predetermined range and A tuning means connected to each filter to be energized by signals passing through said filter to tone said interferometer-type receivers to receive said frequency-varying signal.
Claim 8
Dependent Claim
129 words
In a space surveillance system which includes interferometer-type receivers for receiving signals from satellites, said signals varying in frequency within a predetermined range because of the doppler effect arising from different possible satellite velocities, a device for automatically tuning said receivers comprising: An antenna for receiving said varying frequency signal from said satellite; A comb filter having a plurality of channels; Means coupling said antenna and said comb filter; A filter in each of said plurality of comb filter channels, each filter having a different passband contained in said predetermined range, the passbands of said filters being spaced throughout said predetermined range and A tuning means connected to each filter to be energized by signals passing through said filter to tone said interferometer-type receivers to receive said frequency-varying signal.
Claim 9
Dependent Claim
25 words
An automatic tuning device as set forth in claim 5 wherein each of said tuning means is an oscillator which operates at a different frequency.
Claim 10
Dependent Claim
38 words
An automatic tuning device as set forth in claim 5 wherein said comb filter further includes inhibit circuit means connected to every one of said tuning means for preventing the concurrent energization of more than one tuning means.
Claim 11
Dependent Claim
22 words
An automatic tuning device as set forth in claim 5 wherein said coupling means includes at least one stage of frequency reduction.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |