Patent US4198611A successfully refreshed from Google Patents.
US4198611A
Expired / Lapsed
US
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Redundancy system with eight devices for five channels
Assignee: RCA Corp
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Filing: 1977-08-01
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Granted: 1980-04-15
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Expires: 1997-08-01
Abstract
Abstract A redundancy system for use in a communications satellite. Eight traveling wave tube amplifiers are provided for five communications channels in a manner such that full service is maintained even though any three of the amplifiers have failed. A ten-switch network connects the five channels to the inputs of the eight TWT amplifiers, and a mirror-image ten-switch network connects the outputs of the eight TWT amplifiers to the five channels.
Inventors
- 👤 Kai Yin Eng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:59
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/74; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1851; H04B7/18515
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A redundancy system for connecting various combinations of eight available devices 1 through 8 to five channels A 1 through E 9 comprising, ten switches labeled A, B, C, D, E, C-E, 1-2, 3-4, 5-6 and 7-8, means including switches A, 1-2 and 7-8 connecting channel A 1 with device 1, 2, 7 or 8, means including switches B, 5-6 and 7-8 connecting channel B 3 with device 5, 6, 7 or 8, means including switches C, C-E, 1-2, 3-4 and 5-6 connecting channel C 5 with device 1, 2, 3 or 5, means including switches D, A, 1-2 and 3-4 connecting channel D 7 with device 1, 2, 3 or 4, and means including switches E, C-E, B, 3-4 and 5-6 connecting channel E 9 with device 3, 4, 5 or 6.
Claim 2
Dependent Claim
133 words
A redundancy system for connecting various combinations of eight available devices 1 through 8 to five channels A 1 through E 9 comprising, ten switches labeled A, B, C, D, E, C-E, 1-2, 3-4, 5-6 and 7-8, means including switches A, 1-2 and 7-8 connecting channel A 1 with device 1, 2, 7 or 8, means including switches B, 5-6 and 7-8 connecting channel B 3 with device 5, 6, 7 or 8, means including switches C, C-E, 1-2, 3-4 and 5-6 connecting channel C 5 with device 1, 2, 3 or 5, means including switches D, A, 1-2 and 3-4 connecting channel D 7 with device 1, 2, 3 or 4, and means including switches E, C-E, B, 3-4 and 5-6 connecting channel E 9 with device 3, 4, 5 or 6.
Claim 3
Dependent Claim
12 words
A system according to claim 1 wherein said switches are transfer switches.
Claim 4
Dependent Claim
29 words
A system according to claim 2 wherein said switches C, D and E have terminations connected to otherwise unused ports to properly terminate unused amplifiers connected to other ports.
Claim 5
Dependent Claim
23 words
A system according to claim 1 wherein said switches C, D and E are single-pole-double-throw switches, and the remaining switches are transfer switches.
Claim 6
Dependent Claim
14 words
A system according to claim 1 wherein said devices are traveling wave tube amplifiers.
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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |