US3968411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter-receiver protection device
Assignee: United States Department of the Army
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Filing: 1975-03-27
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Granted: 1976-07-06
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Expires: 1995-03-27
Abstract
Abstract A protection device having a spark gap device connected between an antennand ground and a spark gap device connected between the input to the receiver and ground for shunting electromagnetic transients to ground.
Inventors
- 👤 Heinz G. Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:44
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/50; H01T; H01T4/00; H01T4/08; H02; H02H; H02H9/00; H02H9/04; H02H9/06; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
In a transmitter-receiver system having an antenna, a TR switch, a transmitter and a receiver, an improvement comprising a protection device having a housing; two spark gap devices connected in parallel, each of said spark gap devices having first terminals connected to the base of said antenna between said antenna and said TR switch and second terminals connected to said housing at separate and distinct points of common potential; and additional spark gap means having a first terminal connected between said TR switch and said receiver and a second terminal connected to a point of common potential.
Claim 2
Dependent Claim
97 words
In a transmitter-receiver system having an antenna, a TR switch, a transmitter and a receiver, an improvement comprising a protection device having a housing; two spark gap devices connected in parallel, each of said spark gap devices having first terminals connected to the base of said antenna between said antenna and said TR switch and second terminals connected to said housing at separate and distinct points of common potential; and additional spark gap means having a first terminal connected between said TR switch and said receiver and a second terminal connected to a point of common potential.
Claim 3
Dependent Claim
20 words
The system of claim 1 wherein said two spark gap devices connected in parallel have a capacitance below 10 picofarads.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |