US3071716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trimmer condenser
Assignee: Erie Resistor Corp
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Filing: 1960-04-19
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Granted: 1963-01-01
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Expires: 1980-04-19
Abstract
No abstract record available.
Inventors
- 👤 Fletcher R Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:23
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/12; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A TRIMMER CONDENSER HAVING INNER AND OUTER ELECTRODES, A TUBULAR DIELECTRIC CARRYING ONE OF THE ELECTRODES, THE OTHER ELECTRODE BEING A PLUNGER IN TELESCOPING RELATION TO SAID DIELECTRIC WITH A GAP BETWEEN ONE SURFACE OF THE PLUNGER AND THE DIELECTRIC, TRAVERSING MEANS FOR THE PLUNGER, AND A FUSIBLE METAL COATING ON SAID SURFACE OF THE PLUNGER OF SUFFICIENT THICKNESS IN THE MOLTEN STATE TO FILL THE GAP BETWEEN THE PLUNGER AND DIELECTRIC AND SAID FUSIBLE METAL ADHERING TO THE PLUNGER BUT NOT TO THE DIELECTRIC, THE PLUNGER WITH ITS FUSIBLE METAL COATING HAVING A COEFFICIENT TO THERMAL EXPANSION GREATER THAN THE DIELECTRIC WHEREBY THE SHRINKAGE UPON COOLING PROVIDES AN AIR GAP BETWEEN THE COATING AND THE BORE OF THE DIELECTRIC AND THE MELTING POINT OF SAID FUSIBLE METAL BEING LESS THAN THE MELTING POINTS OF THE PLUNGER AND DIELECTRIC.
Claim 2
Dependent Claim
139 words
A TRIMMER CONDENSER HAVING INNER AND OUTER ELECTRODES, A TUBULAR DIELECTRIC CARRYING ONE OF THE ELECTRODES, THE OTHER ELECTRODE BEING A PLUNGER IN TELESCOPING RELATION TO SAID DIELECTRIC WITH A GAP BETWEEN ONE SURFACE OF THE PLUNGER AND THE DIELECTRIC, TRAVERSING MEANS FOR THE PLUNGER, AND A FUSIBLE METAL COATING ON SAID SURFACE OF THE PLUNGER OF SUFFICIENT THICKNESS IN THE MOLTEN STATE TO FILL THE GAP BETWEEN THE PLUNGER AND DIELECTRIC AND SAID FUSIBLE METAL ADHERING TO THE PLUNGER BUT NOT TO THE DIELECTRIC, THE PLUNGER WITH ITS FUSIBLE METAL COATING HAVING A COEFFICIENT TO THERMAL EXPANSION GREATER THAN THE DIELECTRIC WHEREBY THE SHRINKAGE UPON COOLING PROVIDES AN AIR GAP BETWEEN THE COATING AND THE BORE OF THE DIELECTRIC AND THE MELTING POINT OF SAID FUSIBLE METAL BEING LESS THAN THE MELTING POINTS OF THE PLUNGER AND DIELECTRIC.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |