Patent US3681828A successfully refreshed from Google Patents.
US3681828A
Expired / Lapsed
US
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Method of making rotors for variable capacitors
Assignee: American Technical Ceramics Corp
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Filing: 1970-05-21
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Granted: 1972-08-08
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Expires: 1990-05-21
Abstract
Abstract A method of making rotors for variable capacitors which employs a thin glass plate and a thicker backing glass plate onto each of which is positioned an array of metalized electrodes in identical patterns. The plates are juxtaposed to place the electrodes in registration and the assembly of plates is then fired to fuse them and form an integral monolithic glass body with electrodes of the thin plate embedded in the glass body. Holes are bored in the glass body through the electrodes and the electrodes are then electrically connected together by metalizing interiors of the holes. The rotor discs are then cut out of the glass body, each disc including one pair of registering electrodes. Conductive members are then added to complete the rotor assembly.
Inventors
- 👤 Frank G J Mezey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:25
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/06; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
A method of making rotors for variable capacitors, comprising the steps of: discretely applying first electrodes in a first spaced array to a first thin, fusible, flat dielectric plate; discretely applying second electrodes in a second spaced array to a second fusible, flat, dielectric plate thicker than said electrodes on said first plate; stacking the side of said first plate having said first electrodes thereon to the side of said second plate, opposite the side said second electrodes are applied, such that each of said discrete first electrodes are vertically aligned with a corresponding discrete second electrode; firing said plates to bond them together and form an integral, monolithic body with said first electrodes embedded in said body; and cutting a plurality of discs out of said body with each disc containing one of said first electrodes and one of said second electrodes.
Claim 2
Independent Claim
143 words
A method of making rotors for variable capacitors, comprising the steps of: discretely applying first electrodes in a first spaced array to a first thin, fusible, flat dielectric plate; discretely applying second electrodes in a second spaced array to a second fusible, flat, dielectric plate thicker than said electrodes on said first plate; stacking the side of said first plate having said first electrodes thereon to the side of said second plate, opposite the side said second electrodes are applied, such that each of said discrete first electrodes are vertically aligned with a corresponding discrete second electrode; firing said plates to bond them together and form an integral, monolithic body with said first electrodes embedded in said body; and cutting a plurality of discs out of said body with each disc containing one of said first electrodes and one of said second electrodes.
Claim 3
Dependent Claim
37 words
A method as defined in claim 1, further comprising the step of drilling first holes in said body to serve as centers of rotation for said discs, and second holes to expose portions of said first electrodes.
Claim 4
Dependent Claim
33 words
A method as defined in claim 2, further comprising the step of inserting a conductive element in each of said second holes to electrically connect each pair of aligned first and second electrodes.
Claim 5
Dependent Claim
36 words
A method as defined in Claim 1, wherein said discrete applying of first electrodes and said discrete applying of second electrodes each comprises the step of metallizing films bonded respectively to said first and second plate.
Claim 6
Dependent Claim
34 words
A method as defined in claim 2, further comprising the step of metallizing the interior of each of said second holes to connect each pair of registering first and second electrodes mechanically and electrically.
Claim 7
Dependent Claim
61 words
A method as defined in claim 1 wherein the step of firing said plate comprises the step of placing blocks on opposite sides of said first and second plates to form an assembly, placing the assembly into a vacuum furnace and heating the furnace to a temperature such that said plates fuse to each other to form an integral monolithic structure.
Claim 8
Dependent Claim
22 words
A method as defined in claim 6, further comprising the step of clamping said rectangular blocks together to form a rigid assembly.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |