Patent US3034366A successfully refreshed from Google Patents.
Patent US3374436A successfully refreshed from Google Patents.
US3374436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrum analyzer including a tuned band-pass filter
Assignee: Melpar Inc
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Filing: 1965-03-09
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Granted: 1968-03-19
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Expires: 1985-03-09
Abstract
No abstract record available.
Inventors
- 👤 George H Thiess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:48
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/215; H01P1/218; G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A SCANNING SPECTRUM ANALYZER FOR DERIVING INFORMATION INDICATIVE OF THE FREQUENCY COMPONENTS OF AN R.F. SIGNAL OVER A PREDETERMINED RELATIVELY WIDE FREQUENCY BAND, A TUNABLE BAND-PASS FILTER RESPONSIVE TO AID R.F. SIGNAL, SAID FILTER INCLUDING A CRYSTAL HAVING MOLECULES WITH MAGNETIC MOMENTS PRECESSED AT A RATE DETERMINED BY A MAGNETIC FIELD APPLIED THERETO, MEANS FOR APPLYING A TIME VARIABLE MAGNETIC FIELD TO SAID CRYSTAL TO SCAN THE CENTER FREQUENCY OF SAID FILTER THROUGH SAID FREQUENCY BAND, AND DETECTOR MEANS RESPONSIVE TO THE R.F. SIGNAL DERIVING FROM SAID FILTER FOR PROVIDING A D.C. SIGNAL LEVEL INDICATIVE OF THE R.F. COMPONENTS PASSED THROUGH SAID FILTER.
Claim 2
Dependent Claim
103 words
A SCANNING SPECTRUM ANALYZER FOR DERIVING INFORMATION INDICATIVE OF THE FREQUENCY COMPONENTS OF AN R.F. SIGNAL OVER A PREDETERMINED RELATIVELY WIDE FREQUENCY BAND, A TUNABLE BAND-PASS FILTER RESPONSIVE TO AID R.F. SIGNAL, SAID FILTER INCLUDING A CRYSTAL HAVING MOLECULES WITH MAGNETIC MOMENTS PRECESSED AT A RATE DETERMINED BY A MAGNETIC FIELD APPLIED THERETO, MEANS FOR APPLYING A TIME VARIABLE MAGNETIC FIELD TO SAID CRYSTAL TO SCAN THE CENTER FREQUENCY OF SAID FILTER THROUGH SAID FREQUENCY BAND, AND DETECTOR MEANS RESPONSIVE TO THE R.F. SIGNAL DERIVING FROM SAID FILTER FOR PROVIDING A D.C. SIGNAL LEVEL INDICATIVE OF THE R.F. COMPONENTS PASSED THROUGH SAID FILTER.
Claim 3
Dependent Claim
79 words
A FILTER COMPRISING A FERRIMAGNETIC CRYSTAL HAVING MOLECULES WITH MAGNETIC MOMENTS PRECESSED AT A RATE DETERMINED BY A MAGNETIC FIELD APPLIED THERETO, A PERMANENT MAGNET HAVING AN AIR GAP FOR PROVIDING SAID MAGNETIC FIELD, SAID CRYSTAL BEING DISPOSED IN SAID AIR GAP, A PAIR OF LOOPS DISPOSED IN ORTHOGONAL PLANES TO EACH OTHER BEING COUPLED ABOUT SAID CRYSTAL AND HAVING ASSOCIATED MAGNETIC FIELDS EXTENDING IN A PLANE ORTHOGONAL TO THE PLANE OF SAID MAGNETIC FIELD OF SAID PERMANENT MAGNET.
Claim 4
Dependent Claim
79 words
A FILTER COMPRISING A FERRIMAGNETIC CRYSTAL HAVING MOLECULES WITH MAGNETIC MOMENTS PRECESSED AT A RATE DETERMINED BY A MAGNETIC FIELD APPLIED THERETO, A PERMANENT MAGNET HAVING AN AIR GAP FOR PROVIDING SAID MAGNETIC FIELD, SAID CRYSTAL BEING DISPOSED IN SAID AIR GAP, A PAIR OF LOOPS DISPOSED IN ORTHOGONAL PLANES TO EACH OTHER BEING COUPLED ABOUT SAID CRYSTAL AND HAVING ASSOCIATED MAGNETIC FIELDS EXTENDING IN A PLANE ORTHOGONAL TO THE PLANE OF SAID MAGNETIC FIELD OF SAID PERMANENT MAGNET.
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) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |