US3789175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric compressed-gas circuit breaker
Assignee: Siemens AG
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Filing: 1973-02-22
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Granted: 1974-01-29
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Expires: 1993-02-22
Abstract
Abstract An electric compressed-gas circuit breaker is disclosed and has two stationary contact pieces. A switching unit is movable between closed and open positions for electrically bridging the contact pieces in the closed position and for electrically disconnecting the contact pieces in the open position whereby an arc develops when the switching unit is moved to the open position. A gas-blast arrangement blasts a stream of gas through the arc when the switching unit is moved to the open position. The switching unit includes a supporting body and a slide-contact ring made of arc-resistant material slideably contacting one of the contact pieces in the closed position. The ring is mounted on the supporting body so as to be electrically insulated therefrom. A plurality of elongated contact elements are disposed in the supporting body for electrically connecting the contact pieces when the switching unit is in the closed position. The contact elements are spring loaded to displace the same into electrically conductive contact with the slide-contact ring as the ring and the contact elements separate from the one contact piece when the switching unit moves into the open position.
Inventors
- 👤 H Beier
- 👤 S Handke
- 👤 W Konczal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:57
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/88; H01H33/90; H01H33/91; H01H33/02; H01H33/04; H01H33/12; H01H33/7015; H01H33/7038; H01H33/7053
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
185 words
An electric compressed-gas circuit breaker comprising two stationary contact pieces; a switching unit movable between closed and open positions for electrically bridging said contact pieces in the closed position and for electrically disconnecting said contact pieces in the open position whereby an arc develops when said switching unit is moved to the open position; and gasblast means for blasting a stream of gas through the arc when said switching unit is moved to the open position; said switching unit including a supporting body, a slide-contact ring made of arc-resistant material slideably contacting one of said contact pieces in the closed position, said ring being mounted on said supporting body so as to be electrically insulated therefrom, a plurality of elongated contact elements disposed in said supporting body for electrically connecting said contact pieces when said switching unit is in the closed position, and spring means for spring loading said contact elements to displace the same into electrically conductive contact with said slide-contact ring as said ring and said contact elements separate from said one contact piece when said switching unit moves into the open position.
Claim 2
Dependent Claim
185 words
An electric compressed-gas circuit breaker comprising two stationary contact pieces; a switching unit movable between closed and open positions for electrically bridging said contact pieces in the closed position and for electrically disconnecting said contact pieces in the open position whereby an arc develops when said switching unit is moved to the open position; and gasblast means for blasting a stream of gas through the arc when said switching unit is moved to the open position; said switching unit including a supporting body, a slide-contact ring made of arc-resistant material slideably contacting one of said contact pieces in the closed position, said ring being mounted on said supporting body so as to be electrically insulated therefrom, a plurality of elongated contact elements disposed in said supporting body for electrically connecting said contact pieces when said switching unit is in the closed position, and spring means for spring loading said contact elements to displace the same into electrically conductive contact with said slide-contact ring as said ring and said contact elements separate from said one contact piece when said switching unit moves into the open position.
Claim 3
Dependent Claim
88 words
The 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 switching unit so as to cause a relative movement between said piston and said cylinder when said switching unit moves to the open position to impart sufficient energy to the gas for blasting the same through the arc, said contact pieces having a nozzle-like configuration for receiving the gas blasted through the arc.
Claim 4
Dependent Claim
55 words
The circuit breaker of claim 2 comprising a layer of insulation material disposed between said supporting body and said slide-contact ring, said slide-contact ring having an end face directed toward said contact elements, said ring having a rim projecting from said end face to an extent sufficient to form a cage for said contact elements.
Claim 5
Dependent Claim
36 words
The circuit breaker of claim 2, said contact pieces having respective contours asymmetrical with respect to each other, said one contact piece having a smaller nozzle opening than the other one of said two contact pieces.
Claim 6
Dependent Claim
70 words
The circuit breaker of claim 2 comprising a layer of insulation material disposed between said supporting body and said slide-contact ring, said layer having an end portion directed away from said slide-contact ring, said end portion being configured as a slider body for coacting with said one stationary contact piece to choke the gas from said gas-blast means in the initial movement of said switching unit to the open position.
Claim 7
Dependent Claim
24 words
The circuit breaker of claim 2, said slider body having a conical nozzle opening for directing the flow of the gas to the arc.
Claim 8
Dependent Claim
36 words
The circuit breaker of claim 6, said contact pieces having respective contours asymmetrical with respect to each other, said one contact piece having a smaller nozzle opening than the other one of said two contact pieces.
References Cited (Backward Citations)
DE1965853A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |