Patent US3818237A successfully refreshed from Google Patents.
US3818237A
Expired / Lapsed
US
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Means for providing redundancy of key system components
Assignee: Raytheon Co
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Filing: 1972-08-14
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Granted: 1974-06-18
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Expires: 1992-08-14
Abstract
Abstract A system is disclosed for providing equipment redundancy where, in one embodiment, two substantially identical sources respectively supply substantially identical signals to two load circuits under normal operating conditions. In this embodiment, switching means is coupled to a 3 decibel hybrid and also to the sources and load circuits. When one of the sources fails, the switching means is utilized to operationally remove the defective source from its associated load circuit and to couple the remaining source to one input of the 3 decibel hybrid. Two outputs of the hybrid are respectively coupled through the switching means to the load circuits to then enable the load circuits to continue operating.
Inventors
- 👤 T Straus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:16
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A system comprising: first and second means for respectively developing first and second signals; first and second load circuits; a three db hybrid for producing third and fourth signals of substantially equal power levels in response to either of said first and second signals; and dual mode switching means coupled to said first and second means, said first and second load circuits and said 3 db hybrid, said switching means applying the first and second signals to said first and second load circuits, respectively, in a first mode of operation, said switching means applying only a selected one of the first and second signals to said 3 db hybrid and applying the third and fourth signals to said first and second load circuits, respectively, in a second mode of operation.
Claim 2
Independent Claim
130 words
A system comprising: first and second means for respectively developing first and second signals; first and second load circuits; a three db hybrid for producing third and fourth signals of substantially equal power levels in response to either of said first and second signals; and dual mode switching means coupled to said first and second means, said first and second load circuits and said 3 db hybrid, said switching means applying the first and second signals to said first and second load circuits, respectively, in a first mode of operation, said switching means applying only a selected one of the first and second signals to said 3 db hybrid and applying the third and fourth signals to said first and second load circuits, respectively, in a second mode of operation.
References Cited (Backward Citations)
US3601551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |