US3801763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressed-gas circuit breaker
Assignee: Siemens AG
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Filing: 1973-03-01
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Granted: 1974-04-02
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Expires: 1993-03-01
Abstract
Abstract A compressed-gas circuit breaker such as a high-voltage power breaker and the like is disclosed. The circuit breaker has two stationary contact pieces mutually adjacent and defining a gap therebetween. Each of the contact pieces is of hollow configuration for accommodating the passage of the gas. A primary switching member is movable between open and closed positions for electrically bridging the contact pieces in the closed position and an auxiliary switching member is mounted so as to be slideable in the contact pieces for electrically opening and closing the gap. A drive moves the primary switching member between the open and closed positions. A coupling couples the auxiliary switching member to the drive to cause the auxiliary switching member to open the gap after the elapse of a time interval commencing at the separation of the primary switching member from at least one of the contact pieces during the movement of the primary switching member to the open position whereby the primary switching member switches without an arc at the separation and whereby the auxiliary switching member draws an arc when the gap is opened. A gas-blast arrangement actuated by the drive blasts a stream of gas through the arc when the primary switching member is moved to the open position.
Inventors
- 👤 H Marin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:06
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/91
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
206 words
A compressed-gas circuit breaker such as a high-voltage power breaker and the like comprising two stationary contact pieces mutually adjacent and defining a gap therebetween, each of said contact pieces having a hollow configuration for accommodating the passage of the gas; a primary switching member movable between open and closed positions for electrically bridging said contact pieces in the closed position; an auxiliary switching member mounted so as to be slideable in said contact pieces for electrically opening and closing said gap; a drive for moving said primary switching member between said open and closed positions; coupling means for coupling said auxiliary switching member to said drive to cause said auxiliary switching member to open said gap after the elapse of a time interval commencing at the separation of said primary switching member from at least one of said contact pieces during the movement of said primary switching member to said open position whereby said primary switching member switches without an arc at said separation and whereby said auxiliary switching member draws an arc when said gap is opened; and gas-blast means actuated by said drive for blasting a stream of gas through the arc when said primary switching member is moved to said open position.
Claim 2
Dependent Claim
206 words
A compressed-gas circuit breaker such as a high-voltage power breaker and the like comprising two stationary contact pieces mutually adjacent and defining a gap therebetween, each of said contact pieces having a hollow configuration for accommodating the passage of the gas; a primary switching member movable between open and closed positions for electrically bridging said contact pieces in the closed position; an auxiliary switching member mounted so as to be slideable in said contact pieces for electrically opening and closing said gap; a drive for moving said primary switching member between said open and closed positions; coupling means for coupling said auxiliary switching member to said drive to cause said auxiliary switching member to open said gap after the elapse of a time interval commencing at the separation of said primary switching member from at least one of said contact pieces during the movement of said primary switching member to said open position whereby said primary switching member switches without an arc at said separation and whereby said auxiliary switching member draws an arc when said gap is opened; and gas-blast means actuated by said drive for blasting a stream of gas through the arc when said primary switching member is moved to said open position.
Claim 3
Dependent Claim
91 words
The compressed-gas circuit breaker of claim 1, said coupling means comprising two parts having a common axis and mounted so as to be movable along said axis, one of said parts being rigidly coupled to said drive and the other one of said parts being rigidly coupled to said auxiliary switching member, and striker means for mutually engaging said parts during the movement of said primary switching member at the conclusion of said time interval to move said other part along said axis with said one part thereby opening said gap.
Claim 4
Dependent Claim
46 words
The compressed-gas circuit breaker of claim 2, said parts being respective tubulaR members defining an interface therebetween, said striker means being stops mounted at said interface so as to define limits within which said one part can move along said axis relative to said other part.
Claim 5
Dependent Claim
23 words
The compressed-gas circuit breaker of claim 3, said stops having respective striking surfaces coacting to move said auxiliary switching member along said axis.
Claim 6
Dependent Claim
17 words
The compressed-gas circuit breaker of claim 4 comprising resilient intermediate members disposed between said coacting striking surfaces.
Claim 7
Dependent Claim
26 words
The compressed-gas circuit breaker of claim 1 wherein the mass of said auxiliary switching member corresponds to at most one-tenth of the mass of said drive.
Claim 8
Dependent Claim
74 words
The compressed-gas circuit breaker of claim 1, said gas-blast means comprising a cylinder for holding the gas therein, and a piston mounted in said cylinder, said cylinder and said piston being mounted with respect to said gap so as to cause a relative movement between said piston and said cylinder when said primary switching member moves to said open position to impart sufficient energy to the gas for blasting the same through the arc.
Claim 9
Dependent Claim
20 words
The compressed-gas circuit breaker of claim 7, said cylinder being constituted at least in part by said primary switching member.
Claim 10
Dependent Claim
33 words
The compressed-gas circuit breaker of claim 1 wherein said primary switching member is separated electrically from both of said stationary contact pieces when said primary switching member is outside of said closed position.
Claim 11
Dependent Claim
16 words
The compressed-gas circuit breaker of claim 1, said auxiliary switching member being made of arc-resistant material.
Claim 12
Dependent Claim
15 words
The compressed-gas circuit breaker of claim 1, said auxiliary switching member having a tubular configuration.
Claim 13
Dependent Claim
29 words
The compressed-gas circuit breaker of claim 1 wherein said auxiliary switching member is separated electrically from said stationary contact pieces in said open position of said primary switching member.
Claim 14
Dependent Claim
66 words
The compressed-gas circuit breaker of claim 1 wherein said drive and said coupling means coact to move said auxiliary switching member to a position whereat the same is withdrawn from said contact pieces when said primary switching member is in said open position whereby the respective hollows of said contact pieces afford an unobstructed passage to the gas blasted through the arc by said gas-blast means.
Claim 15
Dependent Claim
19 words
The compressed-gas circuit breaker of claim 1, said auxiliary switching member being electrically insulated with respect to said drive.
References Cited (Backward Citations)
FR1491851A
Cited
DE1965853A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |