Patent US3819965A successfully refreshed from Google Patents.
US3819965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling systems especially for dry type induction regulators
Assignee: General Electric Co
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Filing: 1972-11-20
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Granted: 1974-06-25
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Expires: 1992-11-20
Abstract
Abstract An induction regulator is provided having cooling ducts on the exterior of the stator core. The ends of the rotor windings are spaced from the core and from the shaft to provide cooling ducts therebetween. An air deflector is provided at the upper end of the exterior cooling ducts to deflect cooling air through the stator winding and through the cooling ducts on the rotor windings, thereby cooling the ends of such windings. The lower ends of both the stator and rotor winding are cooled by the direct blast of cooling air from the cooling air chamber.
Inventors
- 👤 C Schoendube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:03
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/02; H02K9/04; H01; H01F; H01F27/00; H01F27/08; H01F27/085; H01F29/00; H01F29/08; H01F29/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
An induction type electrical apparatus having a stator with windings mounted therein and a rotor having windings and secureD to a shaft for axially rotating within said stator, an air chamber having a pump for forcing cooling air through said induction apparatus, cooling ducts provided on the exterior of said stator and communicating with said air chamber, baffle means at the upper end of said cooling ducts for directing jets of air across the end turns of said stator winding and said rotor winding, said end turns of said rotor winding spaced from said rotor and said shaft to provide cooling ducts therebetween, and said exterior cooling ducts formed by a housing surrounding said stator.
Claim 2
Dependent Claim
115 words
An induction type electrical apparatus having a stator with windings mounted therein and a rotor having windings and secureD to a shaft for axially rotating within said stator, an air chamber having a pump for forcing cooling air through said induction apparatus, cooling ducts provided on the exterior of said stator and communicating with said air chamber, baffle means at the upper end of said cooling ducts for directing jets of air across the end turns of said stator winding and said rotor winding, said end turns of said rotor winding spaced from said rotor and said shaft to provide cooling ducts therebetween, and said exterior cooling ducts formed by a housing surrounding said stator.
Claim 3
Dependent Claim
37 words
An induction apparatus as set forth in claim 1 in which said stator is rectilinear in shape, with the corners thereof being cut on a diagonal and angles welded thereto, said angles forming said exterior cooling ducts.
Claim 4
Dependent Claim
167 words
An induction regulator having a stator with windings mounted therein, a rotor having windings and secured to a shaft and axially mounted for rotation within said stator, a primary cooling passage formed by the air gap between said stator and said rotor, an air chamber, having a pump, fixed to an end plate at one end of said induction regulator, secondary cooling passages formed on the exterior of said stator and communicating at one end with said air chamber, air deflector means mounted on the other end of said secondary cooling passages for deflecting cooling air from said air chamber across the end turns of said stator and said rotor windings, said rotor windings being spaced from said rotor and said shaft to provide cooling ducts therebetween, and said secondary cooling passages formed by angles which are secured to the core of said stator, said stator core being rectilinear in shape with the corners of said core being cut at a diagonal and said angles welded thereto.
Claim 5
Dependent Claim
167 words
An induction regulator having a stator with windings mounted therein, a rotor having windings and secured to a shaft and axially mounted for rotation within said stator, a primary cooling passage formed by the air gap between said stator and said rotor, an air chamber, having a pump, fixed to an end plate at one end of said induction regulator, secondary cooling passages formed on the exterior of said stator and communicating at one end with said air chamber, air deflector means mounted on the other end of said secondary cooling passages for deflecting cooling air from said air chamber across the end turns of said stator and said rotor windings, said rotor windings being spaced from said rotor and said shaft to provide cooling ducts therebetween, and said secondary cooling passages formed by angles which are secured to the core of said stator, said stator core being rectilinear in shape with the corners of said core being cut at a diagonal and said angles welded thereto.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |