Patent US3781500A successfully refreshed from Google Patents.
US3781500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cooled electrical contactor
Assignee: Westinghouse Electric Corp
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Filing: 1972-10-02
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Granted: 1973-12-25
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Expires: 1992-10-02
Abstract
Abstract A contactor characterized by an electrically insulating housing containing a plurality of sets of contacts including corresponding pairs of stationary contacts and movable contacts movable between open and closed positions with respect to each other; the housing having a top wall extending over the movable contacts, gas coolant means for directing currents of coolant gas onto each set of contacts in a direction aligned with the path of travel of the movable contacts, and the gas coolant means comprising a gas manifold connected to gas conduits leading to the top of the housing in which gas inlet nozzles are provided for directing the currents of gas to each set of contacts, particularly during the time the switches are closed.
Inventors
- 👤 K Grunert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:06
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/64; H01H1/00; H01H1/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A circuit interrupter structure comprising an electrically insulating housing, a plurality of sets of contacts within the housing and comprising stationary contacts and movable contacts movable between open and closed positions with the stationary contacts, means for moving the movable contacts, the housing having a top wall extending across the area of the contacts, gas coolant means for directing a current of coolant gas onto the outer surfaces of the stationary and movable contacts of each set of contacts, the gas coolant means comprising a gas inlet in the top wall and a gas conduit leading to each inlet, and a gas manifold connected to the gas conduits and adapted to be connected to a source of coolant gas.
Claim 2
Dependent Claim
119 words
A circuit interrupter structure comprising an electrically insulating housing, a plurality of sets of contacts within the housing and comprising stationary contacts and movable contacts movable between open and closed positions with the stationary contacts, means for moving the movable contacts, the housing having a top wall extending across the area of the contacts, gas coolant means for directing a current of coolant gas onto the outer surfaces of the stationary and movable contacts of each set of contacts, the gas coolant means comprising a gas inlet in the top wall and a gas conduit leading to each inlet, and a gas manifold connected to the gas conduits and adapted to be connected to a source of coolant gas.
Claim 3
Dependent Claim
18 words
The circuit interrupter structure of claim 1 in which the gas conduits are composed of electrically insulating material.
Claim 4
Dependent Claim
21 words
The circuit interrupter structure of claim 1 in which the gas conduits are embedded in the top wall of the housing.
Claim 5
Dependent Claim
23 words
The circuIt interrupter structure of claim 1 in which the gas conduits are elongated hoses extending between the manifold and the gas inlets.
Claim 6
Dependent Claim
30 words
The circuit interrupter structure of claim 1 in which the gas coolant means directs the gas onto the contacts in a direction substantially aligned with the path of contact travel.
Claim 7
Dependent Claim
29 words
The circuit interrupter structure of claim 1 in which the gas coolant is directed in a direction that is non-perpendicular to the path of travel of the movable contact.
Claim 8
Dependent Claim
18 words
The circuit interrupter structure of claim 6 in which the gas conduits are composed of electrically insulating material.
Claim 9
Dependent Claim
21 words
The circuit interrupter structure of claim 6 in which the gas conduits are embedded in the top wall of the housing.
Claim 10
Dependent Claim
23 words
The circuit interrupter structure of claim 6 in which the gas conduits are elongated hoses extending between the manifold and the gas inlets.
Claim 11
Dependent Claim
30 words
The circuit interrupter structure of claim 6 in which the gas coolant means directs the gas onto the contacts in a direction substantially aligned with the path of contact travel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |