US4560896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite slot insulation for dynamoelectric machine
Assignee: General Electric Co
•
Filing: 1984-10-01
•
Granted: 1985-12-24
•
Expires: 2004-10-01
Abstract
Abstract In a dynamoelectric machine, the rotor comprises a solid steel drum formed with axially extending channels which carry electrically-conductive windings. These windings are electrically insulated from the rotor body by so-called slot insulation. The present invention proposes an integrally formed composite insulation comprising aramid paper slot armor and an epoxy-glass sub-slot cover.
Inventors
- 👤 George H. Vogt
- 👤 Scott K. Derderian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:37
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/34; H02K3/345; Y; Y10; Y10S; Y10S174/00; Y10S174/13; Y10S174/14; Y10S174/19; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24198; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T428/24347
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A composite slot armor and sub-slot cover for a dynamoelectric machine comprising: slot armor including a "U"-shaped aramid paper channel having a base portion including a plurality of axially spaced apart holes formed therethrough; a sub-slot cover including epoxy-glass layers formed integrally with the base portion of the "U"-shaped channel; and, axially elongated ventilation slots formed through the base portion and the epoxy-glass layers.
Claim 2
Dependent Claim
64 words
A composite slot armor and sub-slot cover for a dynamoelectric machine comprising: slot armor including a "U"-shaped aramid paper channel having a base portion including a plurality of axially spaced apart holes formed therethrough; a sub-slot cover including epoxy-glass layers formed integrally with the base portion of the "U"-shaped channel; and, axially elongated ventilation slots formed through the base portion and the epoxy-glass layers.
Claim 3
Dependent Claim
24 words
The composite article recited in claim 1 wherein the epoxy-glass layers are on each side of the base portion sandwiching the base portion therebetween.
Claim 4
Dependent Claim
13 words
The composite article recited in claim 1 wherein the aramid paper is Nomex.
Claim 5
Dependent Claim
12 words
The composite article recited in claim 3 wherein the epoxy-glass is Scotchply.
Claim 6
Dependent Claim
76 words
A composite slot armor and sub-slot cover for a dynamoelectric machine rotor having a plurality of axially extending slots each slot having radially extending sidewalls; the slot armor and sub-slot cover comprising: slot armor including a "U"-shaped aramid paper channel; and, a sub-slot cover including epoxy-glass layers formed integrally with an axially extending base portion of the slot armor; the base portion of the slot armor formed with spaced-apart holes allowing bonding between the epoxy-glass layers.
Claim 7
Dependent Claim
76 words
A composite slot armor and sub-slot cover for a dynamoelectric machine rotor having a plurality of axially extending slots each slot having radially extending sidewalls; the slot armor and sub-slot cover comprising: slot armor including a "U"-shaped aramid paper channel; and, a sub-slot cover including epoxy-glass layers formed integrally with an axially extending base portion of the slot armor; the base portion of the slot armor formed with spaced-apart holes allowing bonding between the epoxy-glass layers.
Claim 8
Dependent Claim
25 words
The article recited in claim 5 wherein the base portion of the slot armor and the epoxy-glass layers are formed with axially elongated ventiliation slots.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |