US3786310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid dc circuit breaker
Assignee: Raytheon Co
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Filing: 1973-03-29
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Granted: 1974-01-15
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Expires: 1993-03-29
Abstract
Abstract DC circuit breaker has both in-line and line-to-ground components to limit in-line and line-to-ground voltages during load breaking and fault clearing. Impedance insertion forces down current.
Inventors
- 👤 W Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:44
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/59; H01H33/596; H02; H02H; H02H3/00; H02H3/02; H02H3/021
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
223 words
A circuit breaker for connection between first and second lines for the carrying of direct current and for the interruption of current in said first line, comprising: a switch in said first line between a first connection point and a second connection point in said first line for opening said first line between said first connection point and said second connection point; first means capable of conducting direct current and offswitching direct current connected in parallel to said switch in said first line for providing a parallel circuit to said first switch for receiving current when said first switch is opened to permit said first switch to deionize and for offswitching direct current through said first means after said first switch has been deionized; second means for on-switching direct current and for absorbing energy from direct current passing therethrough and for offswitching direct current passing therethrough connected between said second connection point and said second line so that voltage between said second connection point and said second line can be limited to be maintained below a predetermined value; third means for absorbing energy from direct current passing therethrough and for off-switching direct current connected between said first connection point and said second means so that voltage between said first and second connection points can be limited to be maintained below a predetermined value.
Claim 2
Dependent Claim
223 words
A circuit breaker for connection between first and second lines for the carrying of direct current and for the interruption of current in said first line, comprising: a switch in said first line between a first connection point and a second connection point in said first line for opening said first line between said first connection point and said second connection point; first means capable of conducting direct current and offswitching direct current connected in parallel to said switch in said first line for providing a parallel circuit to said first switch for receiving current when said first switch is opened to permit said first switch to deionize and for offswitching direct current through said first means after said first switch has been deionized; second means for on-switching direct current and for absorbing energy from direct current passing therethrough and for offswitching direct current passing therethrough connected between said second connection point and said second line so that voltage between said second connection point and said second line can be limited to be maintained below a predetermined value; third means for absorbing energy from direct current passing therethrough and for off-switching direct current connected between said first connection point and said second means so that voltage between said first and second connection points can be limited to be maintained below a predetermined value.
Claim 3
Dependent Claim
23 words
The circuit breaker in claim 1 wherein said first means is a crossed-field switch device connected between said first and second connection points.
Claim 4
Dependent Claim
35 words
The circuit breaker of claim 2 wherein said second means is a serial connection of a crossed-field switch device for off-switching direct current and means for on-switching and absorbing energy from direct current flowing therethrough.
Claim 5
Dependent Claim
22 words
The circuit breaker of claim 3 wherein said means for on-switching and absorbing energy comprises an on-switching device and a separate resistor.
Claim 6
Dependent Claim
35 words
The circuit breaker of claim 1 wherein said second means is a serial connection of a crossed-field switch device for off-switching direct current and means for on-switching and absorbing energy from direct current flowing therethrough.
Claim 7
Dependent Claim
22 words
The circuit breaker of claim 5 wherein said means for on-switching and absorbing energy comprises an on-switching device and a separate resistor.
Claim 8
Dependent Claim
22 words
The circuit breaker of claim 1 wherein said third means is a serial connection of a crossed-field switch device and a resistor.
Claim 9
Dependent Claim
53 words
The circuit breaker of claim 3 wherein said third means is a serial connection of a crossed-field switch device and a resistor, said serial connection being connected at one end at said first connection point and at the other end between the crossed-field switch device of said second means and its energy-absorbing means.
Claim 10
Dependent Claim
53 words
The circuit breaker of claim 5 wherein said third means is a serial connection of a crossed-field switch device and a resistor, said serial connection being connected at one end at said first connection point and at the other end between the crossed-field switch device of said second means and its energy-absorbing means.
Claim 11
Dependent Claim
43 words
The circuit breaker of claim 1 wherein said circuit breaker has its second connection point connected to a power supply and has its first connection point connected to a load, said power sUpply and load also being connected to said third connection point.
Claim 12
Dependent Claim
43 words
The circuit breaker of claim 7 wherein said circuit breaker has its second connection point connected to a power supply and has its first connection point connected to a load, said power supply and load also being connected to said third connection point.
Claim 13
Dependent Claim
43 words
The circuit breaker of claim 8 wherein said circuit breaker has its second connection point connected to a power supply and has its first connection point connected to a load, said power supply and load also being connected to said third connection point.
Claim 14
Dependent Claim
43 words
The circuit breaker of claim 9 wherein said circuit breaker has its second connection point connected to a power supply and has its first connection point connected to a load, said power supply and load also being connected to said third connection point.
Claim 15
Dependent Claim
30 words
The circuit breaker of claim 1 further including means for on-switching direct current and for absorbing energy from direct current connected between said third means and said third connection point.
Claim 16
Dependent Claim
43 words
The circuit breaker of claim 14 wherein said circuit breaker has its second connection point connected to a power supply and has its first connection point connected to a load, said power supply and load also being connected to said third connection point.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |