Patent US3192491A successfully refreshed from Google Patents.
US3192491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuneable double-tuned circuits with variable coupling
Assignee: General Dynamics Corp
•
Filing: 1962-12-06
•
Granted: 1965-06-29
•
Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 Robert J Hesselberth
- 👤 Floyd A Koontz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:22
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A DOUBLE-TUNED BAND-PASS FILTER, A TUNEABLE PRIMARY CIRCUIT INCLUDING A FIRST CONDENSER, A TUNEABLE SECONDARY CIRCUIT INCLUDING A SECOND CONDENSER, THE Q OF SAID CIRCUITS BEING SUBSTANTAILLY EQUAL, MEANS FOR VARYING THE CAPACITY OF SAID FIRST AND SECOND CONDENSERS AS A FUNCTION OF FREQUENCY IN UNISON FOR TUNING SAID CURCURCUITS, A THIRD CONDENSER CONNECTED IN COMMON WITH SAID PRIMARY AND SECONDARY CIRCUITS FOR COUPLING SAID CIRCUITS, AND MEANS FOR VARYING THE CAPACITY OF SAID THIRD CONDENSER AS A NON-LINEAR FUNCTION OF FREQUENCY DIFFERENT FROM SAID FIRSTNAMED FUNCTION WHEREBY TO VARY COEFFICIENT OF COUPLING,
Claim 2
Dependent Claim
94 words
IN A DOUBLE-TUNED BAND-PASS FILTER, A TUNEABLE PRIMARY CIRCUIT INCLUDING A FIRST CONDENSER, A TUNEABLE SECONDARY CIRCUIT INCLUDING A SECOND CONDENSER, THE Q OF SAID CIRCUITS BEING SUBSTANTAILLY EQUAL, MEANS FOR VARYING THE CAPACITY OF SAID FIRST AND SECOND CONDENSERS AS A FUNCTION OF FREQUENCY IN UNISON FOR TUNING SAID CURCURCUITS, A THIRD CONDENSER CONNECTED IN COMMON WITH SAID PRIMARY AND SECONDARY CIRCUITS FOR COUPLING SAID CIRCUITS, AND MEANS FOR VARYING THE CAPACITY OF SAID THIRD CONDENSER AS A NON-LINEAR FUNCTION OF FREQUENCY DIFFERENT FROM SAID FIRSTNAMED FUNCTION WHEREBY TO VARY COEFFICIENT OF COUPLING,
References Cited (Backward Citations)
US1869870A
Cited
US2002193A
Cited
US2196881A
Cited
US2290705A
Cited
US3010015A
Cited
US3019335A
Cited
US3102987A
Cited
US3078949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |