US3707650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective system for series capacitors
Assignee: Westinghouse Electric Corp
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Filing: 1969-05-22
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Granted: 1972-12-26
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Expires: 1989-05-22
Abstract
Abstract Time delay means for actuating a protective bypass switch for series capacitors comprising a bellows device containing a gaseous medium, a valve means pneumatically connected to the bellows, and an adjustable control orifice device, the control orifice being effective to release the gaseous medium from the bellows at a predetermined rate when an overcurrent condition is sensed on the line, the bellows being effective to actuate the protective switch a predetermined time after the overcurrent is sensed.
Inventors
- 👤 Robert T Innis
- 👤 Alan J Berg
- 👤 James N Santilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:40
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/16; B; B21; B21B; B21B37/00; B21B37/48; B21B37/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
In a protective system for capacitors connected in series in an alternating current line, said system including a spark gap device connected across at least some of the capacitors and a bypass switch connected across said capacitors and gap device, means for biasing said bypass switch to closed position, latch means for normally holding the bypass switch in open position, actuating means for causing said latch means to release the bypass switch in response to continued arcing in the spark gap device, said actuating means including time delay means comprising a bellows device, said bellows device being normally held in expanded position by internal gas pressure, means responsive to current flow in said gap device to effect release of gas from the bellows device at a predetermined rate to permit the bellows device to collapse, and means controlled by collapse of the bellows device to actuate the latch means.
Claim 2
Dependent Claim
149 words
In a protective system for capacitors connected in series in an alternating current line, said system including a spark gap device connected across at least some of the capacitors and a bypass switch connected across said capacitors and gap device, means for biasing said bypass switch to closed position, latch means for normally holding the bypass switch in open position, actuating means for causing said latch means to release the bypass switch in response to continued arcing in the spark gap device, said actuating means including time delay means comprising a bellows device, said bellows device being normally held in expanded position by internal gas pressure, means responsive to current flow in said gap device to effect release of gas from the bellows device at a predetermined rate to permit the bellows device to collapse, and means controlled by collapse of the bellows device to actuate the latch means.
Claim 3
Dependent Claim
46 words
The system defined in claim 1 in which the current responsive means includes valve means for normally connecting the bellows device to a source of gas pressure and for effecting release of gas at a predetermined rate in response to current flow in the gap device.
Claim 4
Dependent Claim
38 words
The system defined in claim 2 in which the valve means connects the bellows device to an adjustable control orifice to permit release of gas at a predetermined rate in response to current flow in the gap device.
Claim 5
Dependent Claim
32 words
The system defined in claim 1 in which the bellows device has means for engaging the latch means to release the bypass switch when the bellows device has collapsed a predetermined amount.
Claim 6
Dependent Claim
78 words
The system defined in claim 1 in which the current responsive means includes valve means for normally connecting the bellows to a source of gas pressure and for connecting the bellows to a control orifice to permit release of gas and collapse of the bellows at a predetermined rate in response to current flow in the gap device, and the bellows has means for engaging the latch means to release the bypass switch upon collapse of the bellows.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |