US3854181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing variable capacitors
Assignee: Alps Alpine Co Ltd
•
Filing: 1973-04-02
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Granted: 1974-12-17
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Expires: 1993-04-02
Abstract
Abstract In producing a variable capacitor, a desired number of stator electrodes are stacked alternately with spacers, before attaching the stator electrodes to a stationary capacitor body, and the stacked electrode-spacer structure is pressed and heated to cause fusion-welded coupling between electrodes and spacers through metal plated on the surface of each spacer to form an integrated stator structure. After the desired number of rotor electrodes are stacked in combination with spacers and fusion-welded in an integrated form, the integrated stator electrode structure and the integrated rotor electrode structure are assembled with the capacitor stationary member and a rotor shaft to produce the variable capacitor.
Inventors
- 👤 Y Matsuwake
- 👤 Y Fujishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:36
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/06; Y; Y10; Y10T; Y10T29/00; Y10T29/43
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
178 words
A method of producing a variable capacitor comprising the steps of preparing selected numbers of highly conductive stator electrodes, highly conductive rotor electrodes, and spacers, each of said spacers having a core of a first highly conductive metal and an exterior coating of a second metal whose specific volume resistivity is larger than that of the highly conduCtive metal of its core, stacking alternately said stator electrodes and said spacers to form a first structure and said rotor electrodes and said spacers to form a second structure such that each stacked structure has the electrodes positioned on the outermost opposite ends, pressing each stacked structure and heating contacting zones between said spacers and said electrodes to melt the metal plated around each said spacer in each contacting zone and to cause adjacent electrodes and spacers to fusion-weld one to another through the molten plated metal, cooling said welded electrode structures, and, assembling the integrated rotor electrode structure to a rotor shaft and the integrated stator electrode structure to a capacitor stationary member to thereby produce a variable capacitor.
Claim 2
Independent Claim
178 words
A method of producing a variable capacitor comprising the steps of preparing selected numbers of highly conductive stator electrodes, highly conductive rotor electrodes, and spacers, each of said spacers having a core of a first highly conductive metal and an exterior coating of a second metal whose specific volume resistivity is larger than that of the highly conduCtive metal of its core, stacking alternately said stator electrodes and said spacers to form a first structure and said rotor electrodes and said spacers to form a second structure such that each stacked structure has the electrodes positioned on the outermost opposite ends, pressing each stacked structure and heating contacting zones between said spacers and said electrodes to melt the metal plated around each said spacer in each contacting zone and to cause adjacent electrodes and spacers to fusion-weld one to another through the molten plated metal, cooling said welded electrode structures, and, assembling the integrated rotor electrode structure to a rotor shaft and the integrated stator electrode structure to a capacitor stationary member to thereby produce a variable capacitor.
Claim 3
Dependent Claim
22 words
The method as set forth in claim 1 wherein the heating step is carried out by use of a resistance welding machine.
References Cited (Backward Citations)
US2257643A
Cited
US2435789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |