US3681652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitive filter for suppression of spurious electrical radiation
Assignee: Raytheon Co
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Filing: 1970-05-22
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Granted: 1972-08-01
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Expires: 1990-05-22
Abstract
Abstract A capacitive filter arrangement coupled to the voltage supply circuit of an electrical energy generator to reduce undesired radiation of energy to acceptable levels in accordance with Federal Communications Commission specifications and requirements for such generators when employed in certain electronic equipment. Elimination of corona discharge at predetermined levels of alternating current and no breakdown of insulation material at predetermined levels of direct current are other characteristics of the structure of the invention.
Inventors
- 👤 Carlo P Domenichini
- 👤 Leo Terjenian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:29
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/66; H01; H01J; H01J23/00; H01J23/14; H01J23/15; H04; H04B; H04B15/00; H04B15/02; H05B6/76
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
In combination: a magnetron-type electrical energy generator comprising electrodes having external electrical leads; circuit means for supplying operating voltages to said generator; electrically conductive enclosure means defining capacitive filter means coupled to said generator and enclosing said external leads; opposing walls of said enclosure means defining a central aperture enclosed by insulating means; electrical feedthrough conductors extending through said insulating means; means for electrically connecting one end of said electrical feedthrough conductor to said circuit means; means for electrically connecting the opposing end of said conductor to said generator external leads; and capacitive radio frequency filter means disposed adjacent to opposing ends of said conductors; said capacitive means including inner and outer conductive plate members extending on opposing sides of and parallel to the walls of said enclosure means with dielectric means disposed therebetween; said outer conductive plate members extending beyond the peripheral edges of said central aperture a distance of approximately one-quarter of a wavelength of a hormonic frequency of said generator operating frequency.
Claim 2
Dependent Claim
165 words
In combination: a magnetron-type electrical energy generator comprising electrodes having external electrical leads; circuit means for supplying operating voltages to said generator; electrically conductive enclosure means defining capacitive filter means coupled to said generator and enclosing said external leads; opposing walls of said enclosure means defining a central aperture enclosed by insulating means; electrical feedthrough conductors extending through said insulating means; means for electrically connecting one end of said electrical feedthrough conductor to said circuit means; means for electrically connecting the opposing end of said conductor to said generator external leads; and capacitive radio frequency filter means disposed adjacent to opposing ends of said conductors; said capacitive means including inner and outer conductive plate members extending on opposing sides of and parallel to the walls of said enclosure means with dielectric means disposed therebetween; said outer conductive plate members extending beyond the peripheral edges of said central aperture a distance of approximately one-quarter of a wavelength of a hormonic frequency of said generator operating frequency.
Claim 3
Dependent Claim
167 words
In combination: a magnetron-type electrical energy generator comprising electrodes having external electrical leads; circuit means for supplying operating voltages to said generator; an electrically conductive enclosure defining capacitive filter means coupled to said generator and enclosing said external leads; opposing walls of said enclosure means defining a central aperture enclosed by insulating means; electrical feedthrough conductors extending through said insulating means; and capacitive radio frequency filter means disposed adjacent to opposing ends of said conductors; said capacitive means including inner and outer conductive plate members extending on opposing sides of and parallel to the walls of said enclosure means with dielectric means disposed therebetween; said dielectric means being dimensioned to extend beyond the outer peripheral edges of said enclosure; said outer conductive plate members extending beyond the peripheral edges of said central aperture a distance of approximately one-quarter of a wavelength of a harmonic frequency of said generator operating frequency; and said inner conductive plate members having a diameter substantially larger than said outer conductive plate members.
Claim 4
Dependent Claim
167 words
In combination: a magnetron-type electrical energy generator comprising electrodes having external electrical leads; circuit means for supplying operating voltages to said generator; an electrically conductive enclosure defining capacitive filter means coupled to said generator and enclosing said external leads; opposing walls of said enclosure means defining a central aperture enclosed by insulating means; electrical feedthrough conductors extending through said insulating means; and capacitive radio frequency filter means disposed adjacent to opposing ends of said conductors; said capacitive means including inner and outer conductive plate members extending on opposing sides of and parallel to the walls of said enclosure means with dielectric means disposed therebetween; said dielectric means being dimensioned to extend beyond the outer peripheral edges of said enclosure; said outer conductive plate members extending beyond the peripheral edges of said central aperture a distance of approximately one-quarter of a wavelength of a harmonic frequency of said generator operating frequency; and said inner conductive plate members having a diameter substantially larger than said outer conductive plate members.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |