US3119974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor positioned rotary waveguide switch having absorber to increase attenuation
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1960-12-01
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Granted: 1964-01-28
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Expires: 1980-12-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph J Zavesky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:10
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01P1/12; H01P1/122
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
139 words
AN ATTENUATOR MECHANISM COMPRISING A HOUSING, A PASSAGEWAY HAVING AN INLET PORT AND AN OUTLET PORT FORMED IN SAID HOUSING, A MEMBER ROTATABLY MOUNTED IN SAID PASSAGEWAY, SAID MEMBER BEING ADAPTED TO BE ROTATED TO AT LEAST FIRST AND SECOND POSITIONS, A CHANNEL FORMED IN SAID MEMBER WHICH PLACES SAID INLET PORT IN COMMUNICATION WITH SAID OUTLET PORT WHEN SAID MEMBER IS AT SAID FIRST POSITION, MICROWAVE ABSORBING MATERIAL FASTENED TO SAID MEMBER AT A POSITION SUCH THAT SAID PASSAGEWAY IS TERMINATED BY AN AREA THAT IS COMPOSED APPROXIMATELY OF FIVE SIXTHS OF SAID MEMBER AND ONE SIXTH OF SAID ABSORBING MATERIAL WHEN SAID MEMBER IS AT SAID SECOND POSITION AND PROVIDING AN INSERTION LOSS IN SAID PASSAGEWAY OF AT LEAST ABOUT 80 DECIBELS, AND MEANS FOR AUTOMATICALLY ROTATING SAID MEMBER TO AT LEAST SAID FIRST AND SECOND POSITIONS.
References Cited (Backward Citations)
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Cited
US2814782A
Cited
US2905910A
Cited
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Cited
FR1154813A
Cited
US3022474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |