Patent US4638175A successfully refreshed from Google Patents.
US4638175A
Expired / Lapsed
US
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Electric power distribution and load transfer system
Assignee: RTX Corp
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Filing: 1984-07-03
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Granted: 1987-01-20
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Expires: 2004-07-03
Abstract
Abstract A power distribution system includes a plurality of power sources and load transfer units including transistors and diodes connected in series and leading to a common power output, each of the transistors being controller switchable subject to voltage levels of the respective input and output sides of said transistors, and the voltage and current level of said common power output. The system is part of an interconnection scheme in which all but one of the power sources is connected to a single load transfer unit, enabling the survival of at least a single power source with the failure of one of the load transfer units.
Inventors
- 👤 Michael P. Bradford
- 👤 Gerald W. Parkinson
- 👤 Ross M. Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:53
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/16; G06F1/18; G06F1/189; G06F1/26; G06F1/30; G06F1/305; H; H02; H02J; H02J9/00; H02J9/04; H02J9/06; H02J9/061
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
188 words
A power distribution system, comprising: at least two switch means for controlling the application of power from a plurality of power sources, to a power output; at least two current means for preventing reverse power flow through respective ones of said plurality of switch means; and processing means for providing control signals to operate said switch means, effective to switch respective ones of said power sources between on and off states with respect to said power output; characterized by: first voltage detection means for detecting the levels of first voltages at a first side of corresponding ones of said switch means; first comparator means for comparing the voltages detected by said first voltage detection means to selected upper and lower voltage thresholds and for providing a signal indication of an abnormal voltage condition to said processing means when any of said first detected voltages are at a level not within the bounds of said upper and lower voltage thresholds, said processing means responding to said abnormal signal indicator such that power sources are selectively switched with respect to said power output in view of any abnormal voltage conditions.
Claim 2
Dependent Claim
188 words
A power distribution system, comprising: at least two switch means for controlling the application of power from a plurality of power sources, to a power output; at least two current means for preventing reverse power flow through respective ones of said plurality of switch means; and processing means for providing control signals to operate said switch means, effective to switch respective ones of said power sources between on and off states with respect to said power output; characterized by: first voltage detection means for detecting the levels of first voltages at a first side of corresponding ones of said switch means; first comparator means for comparing the voltages detected by said first voltage detection means to selected upper and lower voltage thresholds and for providing a signal indication of an abnormal voltage condition to said processing means when any of said first detected voltages are at a level not within the bounds of said upper and lower voltage thresholds, said processing means responding to said abnormal signal indicator such that power sources are selectively switched with respect to said power output in view of any abnormal voltage conditions.
Claim 3
Dependent Claim
81 words
The system of claim 1, further characterized by: second voltage detection means for detecting the levels of voltages at another side of corresponding ones of said plurality of switch means; and second comparator means for comparing the voltages detected by said second voltage detection means to at least a lower voltage threshold, and for providing indications of abnormal voltage conditions to said processing means, when any of said second detected voltages is at a level not above said lower voltage threshold.
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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |