US3777226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programmably variable capacitor for use in a capacitive function generator
Assignee: Unisys Corp
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Filing: 1972-10-02
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Granted: 1973-12-04
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Expires: 1992-10-02
Abstract
Abstract A programmably variable capacitor is provided having capacitive values which vary as functionally determined by preselected variations in the physical properties of a dielectric which is translatable along a path central to plates of the capacitor, the capacitive variations providing, when a fixed electric potential is applied across a series circuit including the capacitor and a resistor, a variation in the electric current flow which is representative of the capacitive value of the capacitor.
Inventors
- 👤 Z Luo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:40
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
A programmably variable capacitor comprising: a first electrically conductive electrode having a first arcuately shaped surface, a second electrically conductive electrode having a second arcuately shaped surface, said second arcuately shaped surface being curvilinearly parallel to and spaced apart from said first arcuately shaped surface, and dielectric means disposed effectively between said first and second electrode means for controlling an electric field therebetween upon the application of a first potential to said first electrode means and a different potential to said second electrode means, said dielectric means including a continuous loop of dielectric material forming a right circular cylinder, said cylinder being rotatable between said first and second arcuately shaped surfaces about an axis coincident to the axis of curvature of said arcuately shaped surfaces, said loop of dielectric material including means for predeterminately varying the dielectric properties of said material in the direction of rotation of said right circular cylinder.
Claim 2
Dependent Claim
151 words
A programmably variable capacitor comprising: a first electrically conductive electrode having a first arcuately shaped surface, a second electrically conductive electrode having a second arcuately shaped surface, said second arcuately shaped surface being curvilinearly parallel to and spaced apart from said first arcuately shaped surface, and dielectric means disposed effectively between said first and second electrode means for controlling an electric field therebetween upon the application of a first potential to said first electrode means and a different potential to said second electrode means, said dielectric means including a continuous loop of dielectric material forming a right circular cylinder, said cylinder being rotatable between said first and second arcuately shaped surfaces about an axis coincident to the axis of curvature of said arcuately shaped surfaces, said loop of dielectric material including means for predeterminately varying the dielectric properties of said material in the direction of rotation of said right circular cylinder.
Claim 3
Dependent Claim
29 words
The programmably variable capacitor of claim 1 wherein said means for predeterminately varying the dielectric properties of said material includes insert means having different dielectric properties from said material.
Claim 4
Dependent Claim
26 words
The programmably variable capacitor of claim 1 wherein said means for varying the dielectric properties includes aperture means formed by deleting portions of said dielectric material.
Claim 5
Dependent Claim
25 words
A programmably variable capacitor as defined by claim 1 wherein the angular velocity of said cylinder of dielectric material about its longitudinal axis is constant.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |