Patent US3823334A successfully refreshed from Google Patents.
US3823334A
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US
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Electrical apparatus with high voltage electrical conductor insulated by material including high dielectric constant inserts
Assignee: Westinghouse Electric Corp
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Filing: 1973-07-18
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Granted: 1974-07-09
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Expires: 1993-07-18
Abstract
Abstract A high voltage, insulated conductor for electrical equipment such as dynamoelectric machines where non-uniform electric stresses occur. The insulation has inserts of a material of high dielectric constant incorporated in the insulation in regions of maximum stress to change the stress distribution in a manner to reduce the maximum stress.
Inventors
- 👤 H Philofsky
- 👤 P Sanghavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:52
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
Electrical apparatus with a high voltage electrical conductor insulated to provide reduced electrical stress and comprising: a first conductive member; a second conductive member spaced from said first member; said first and second members being substantially coextensive for a distance to a location at which said first member ends and said second member extends therefrom; insulation on said second member, said insulation comprising a plurality of layers of resin bonded insulating tape of a first dielectric constant and an insert of material of a second dielectric constant, substantially higher than said first dielectric constant, said insert being located proximate said first member where said first and second members coextend and having an edge located substantially at the end of said first member.
Claim 2
Dependent Claim
122 words
Electrical apparatus with a high voltage electrical conductor insulated to provide reduced electrical stress and comprising: a first conductive member; a second conductive member spaced from said first member; said first and second members being substantially coextensive for a distance to a location at which said first member ends and said second member extends therefrom; insulation on said second member, said insulation comprising a plurality of layers of resin bonded insulating tape of a first dielectric constant and an insert of material of a second dielectric constant, substantially higher than said first dielectric constant, said insert being located proximate said first member where said first and second members coextend and having an edge located substantially at the end of said first member.
Claim 3
Dependent Claim
17 words
The subject matter of claim 1 wherein: said insert comprises barium titanate powder in a resin binder.
Claim 4
Dependent Claim
12 words
The subject matter of claim 1 wherein: said insulating tape comprises mica.
Claim 5
Dependent Claim
20 words
The subject matter of claim 1 wherein: said second dielectric constant is in the range from about 40 to 60.
Claim 6
Dependent Claim
27 words
The subject matter of claim 1 wherein: said first member comprises a dynamoelectric machine core having a slot, said second member comprises a conductor in said slot.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |