Patent US879796A successfully refreshed from Google Patents.
Patent US4123676A successfully refreshed from Google Patents.
US4123676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor member for superconducting generator
Assignee: Westinghouse Electric Corp
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Filing: 1976-10-22
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Granted: 1978-10-31
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Expires: 1996-10-22
Abstract
Abstract A rotor is provided for an alternating current generator carrying a superconducting field winding and having a combined damper and shield member comprising a cylindrical member of high electrical conductivity. The shield member is attached to the rotor only at the end opposite the drive shaft and is supported on the rotor at the drive end in a manner to permit relative movement between the shield and the support.
Inventors
- 👤 Glenn D. Cooper
- 👤 Donald C. Litz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:03
CPC Classifications
H; H02; H02K; H02K55/00; H02K55/02; H02K55/04; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/876; Y10S505/877; Y10S505/878
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
169 words
A rotor for a dynamoelectric machine comprising a hollow cylindrical rotor body carrying a field winding of superconducting material, means for circulating a cryogenic coolant fluid through said field winding, shaft portions at opposite ends of the rotor body, one of said shaft portions being a drive shaft, a cylindrical radiation shield surrounding the rotor body concentrically therewith and attached to the rotor at the ends of the radiation shield, a cylindrical vacuum enclosure disposed concentrically with the rotor body outside the radiation shield and spaced radially therefrom, the vacuum enclosure being attached to the rotor adjacent each end thereof with a sealing attachment and the space within the enclosure being evacuated, a cylindrical damper-shield member of high electrical conductivity surrounding the rotor body concentrically therewith outside the vacuum enclosure and spaced radially therefrom, means for rigidly attaching said shield member to the rotor at the end thereof opposite said drive shaft, and means for supporting the shield member on the rotor at the end adjacent the drive shaft.
Claim 2
Dependent Claim
169 words
A rotor for a dynamoelectric machine comprising a hollow cylindrical rotor body carrying a field winding of superconducting material, means for circulating a cryogenic coolant fluid through said field winding, shaft portions at opposite ends of the rotor body, one of said shaft portions being a drive shaft, a cylindrical radiation shield surrounding the rotor body concentrically therewith and attached to the rotor at the ends of the radiation shield, a cylindrical vacuum enclosure disposed concentrically with the rotor body outside the radiation shield and spaced radially therefrom, the vacuum enclosure being attached to the rotor adjacent each end thereof with a sealing attachment and the space within the enclosure being evacuated, a cylindrical damper-shield member of high electrical conductivity surrounding the rotor body concentrically therewith outside the vacuum enclosure and spaced radially therefrom, means for rigidly attaching said shield member to the rotor at the end thereof opposite said drive shaft, and means for supporting the shield member on the rotor at the end adjacent the drive shaft.
Claim 3
Dependent Claim
50 words
A rotor as defined in claim 1 in which said supporting means includes a support member having a cylindrical bearing surface engaging the shield member in a manner to permit relative movement between the shield member and the rotor when the rotor is at standstill or under high torque conditions.
Claim 4
Dependent Claim
35 words
A rotor as defined in claim 2 in which the supporting means and the attaching means for the shield member provide sufficient flexibility to permit relative axial movement between the shield member and the rotor.
References Cited (Backward Citations)
US3648082A
Cited
US3644766A
Cited
US3679920A
Cited
US4017755A
Cited
US3942053A
Cited
US3956648A
Cited
US3999091A
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |