US3239730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable capacitor
Assignee: Individual
•
Filing: 1964-04-16
•
Granted: 1966-03-08
•
Expires: 1984-04-16
Abstract
No abstract record available.
Inventors
- 👤 Farago George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:37
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/12; H01G5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A VARIABLE CAPACITOR COMPRISING A FIRST TUBULAR MEMBER FORMED OF AN INSULATING MATERIAL, A SECOND TUBULAR MEMBER COAXIAL WITH AND PROJECTING FROM ONE END OF SAID FIRST TUBULAR MEMBER, A CYLINDRICAL FIRST ELECTRODE HAVING A CONDUCTING FACE DISPOSED WITHIN AND COAXIAL WITH AND RIGIDLY SUPPORTED BY SAID FIRST TUBULAR MEMBER, A COATING OF DIELECTRIC MATERIAL COVERING AND ADHERENT TO SAID FIRST ELECTRODE, A SCREW MEMBER COAXIAL WITH SAID TUBULAR MEMBERS AND ROTATABLY SUPPORTED BY SAID SECOND TUBULAR MEMBER AND RESTRICTED AGAINST AXIAL MOVEMENT, A HOLLOW CYLINDER SECOND ELECTRODE COAXIAL WITH SAID SECOND TUBULAR MEMBER AND AXIALLY SLIDABLY THEREIN AND HAVING AN INNER DIAMETER SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF SAID DIELECTRIC COVERED FIRST ELECTRODE, A SCREW FOLLOWER CARRIED BY SAID CYLINDER SECOND ELECTRODE AND ENGAGING SAID SCREW, AND MEANS RESTRICTING THE ROTATION OF SAID CYLINDER SECOND ELECTRODE.
Claim 2
Dependent Claim
138 words
A VARIABLE CAPACITOR COMPRISING A FIRST TUBULAR MEMBER FORMED OF AN INSULATING MATERIAL, A SECOND TUBULAR MEMBER COAXIAL WITH AND PROJECTING FROM ONE END OF SAID FIRST TUBULAR MEMBER, A CYLINDRICAL FIRST ELECTRODE HAVING A CONDUCTING FACE DISPOSED WITHIN AND COAXIAL WITH AND RIGIDLY SUPPORTED BY SAID FIRST TUBULAR MEMBER, A COATING OF DIELECTRIC MATERIAL COVERING AND ADHERENT TO SAID FIRST ELECTRODE, A SCREW MEMBER COAXIAL WITH SAID TUBULAR MEMBERS AND ROTATABLY SUPPORTED BY SAID SECOND TUBULAR MEMBER AND RESTRICTED AGAINST AXIAL MOVEMENT, A HOLLOW CYLINDER SECOND ELECTRODE COAXIAL WITH SAID SECOND TUBULAR MEMBER AND AXIALLY SLIDABLY THEREIN AND HAVING AN INNER DIAMETER SUBSTANTIALLY EQUAL TO THE OUTER DIAMETER OF SAID DIELECTRIC COVERED FIRST ELECTRODE, A SCREW FOLLOWER CARRIED BY SAID CYLINDER SECOND ELECTRODE AND ENGAGING SAID SCREW, AND MEANS RESTRICTING THE ROTATION OF SAID CYLINDER SECOND ELECTRODE.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |