US3562569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamo-electric machines having vacuum cast winding insulation
Assignee: Alstom SA
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Filing: 1968-10-31
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Granted: 1971-02-09
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Expires: 1988-10-31
Abstract
Abstract A rotor structure having a thin jacket of closely wrapped nonmagnetic strandlike material, such as fiberglass tape, nonmagnetic steel wires, fiber strands, or the like are wrapped around the rotor structure, the closely wrapped material being impregnated with the insulating material in hardened condition, so that, during manufacture, the wrapping may serve as a mold for vacuum casting of liquid insulation to fill all interstitial spaces between the windings.
Inventors
- 👤 Paul Koechlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:25
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
Rotor for dynamo-electric machines having a magnetic structure with slots therein comprising: windings located within said slots; hardened insulating material located in said slots and surrounding said windings, filling all interstitial spaces and separating and insulating said windings in said slots; and a thin jacket formed of closely wrapped glass fiber strandlike material closing off said slots and extending over the length of the winding and covering said magnetic structure, said glass fiber strandlike material being impregnated with said insulating material filling said interstitial spaces in set, hardenEd condition.
Claim 2
Dependent Claim
89 words
Rotor for dynamo-electric machines having a magnetic structure with slots therein comprising: windings located within said slots; hardened insulating material located in said slots and surrounding said windings, filling all interstitial spaces and separating and insulating said windings in said slots; and a thin jacket formed of closely wrapped glass fiber strandlike material closing off said slots and extending over the length of the winding and covering said magnetic structure, said glass fiber strandlike material being impregnated with said insulating material filling said interstitial spaces in set, hardenEd condition.
Claim 3
Dependent Claim
72 words
Rotor for dynamo-electric machines having a magnetic structure with slots therein comprising: winding located within said slots; hardened insulating material located in said slots and surrounding said windings, filling all interstitial spaces and separating and insulating said windings in said slots; and a thin jacket formed of closely wrapped nonmagnetic steel wires, covered with a thin insulating tape, closing off said slots and impregnated with said insulating material in set, hardened condition.
Claim 4
Dependent Claim
72 words
Rotor for dynamo-electric machines having a magnetic structure with slots therein comprising: winding located within said slots; hardened insulating material located in said slots and surrounding said windings, filling all interstitial spaces and separating and insulating said windings in said slots; and a thin jacket formed of closely wrapped nonmagnetic steel wires, covered with a thin insulating tape, closing off said slots and impregnated with said insulating material in set, hardened condition.
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |