US4533580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite insulation material
Assignee: Individual
•
Filing: 1984-04-19
•
Granted: 1985-08-06
•
Expires: 2004-04-19
Abstract
Abstract A composite insulating material for the coils of large rotating electric plant comprises a central layer of resinous mica paper between outer layers of high temperature textile material, such, for example, as stitch bonded high temperature nylon fibres. The material may be provided in the form of a channel section which, with a complementary such section, fits over a straight slot-fitting section of the coil in the form of a sleeve, which may be consolidated on the coil by a coil pressing operation.
Inventors
- 👤 Malcolm Otty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:11
CPC Classifications
B; B32; B32B; B32B19/00; B32B19/06; B32B19/02; B32B37/00; B32B37/04; B32B37/06; H; H01; H01B; H01B3/00; H01B3/02; H01B3/04; H02; H02K; H02K15/00; H02K15/12; H02K3/00; H02K3/32; B32B2262/00; B32B2262/02; B32B2262/0261; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/1352; Y10T428/1362; Y10T428/24; Y10T428/24033; Y10T428/25; Y10T428/251
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
60 words
A composite insulation material for the slot-fitting coils of large rotating electric plants comprising: a micaceous layer; and outer layers of a textile material capable of being compressed and of absorbing resin, said composite insulation material being preformed in the form of a channel section having an elongated concavity shaped for application to the slot fitting portion of a coil.
Claim 2
Dependent Claim
60 words
A composite insulation material for the slot-fitting coils of large rotating electric plants comprising: a micaceous layer; and outer layers of a textile material capable of being compressed and of absorbing resin, said composite insulation material being preformed in the form of a channel section having an elongated concavity shaped for application to the slot fitting portion of a coil.
Claim 3
Dependent Claim
20 words
A composite insulation material according to claim 1, in which the high temperature textile material comprises high temperature nylon fibres.
Claim 4
Dependent Claim
18 words
A composite insulation material according to claim 1, in which the textile material is a stitch bonded fabric.
Claim 5
Dependent Claim
26 words
A composite insulation material according to claim 1, in which the central layer is bonded to the outer layers by the resin of the central layer.
Claim 6
Dependent Claim
20 words
A composite insulation material according to claim 4, in which the central layer is heat bonded to the outer layers.
Claim 7
Dependent Claim
22 words
A composite insulation material according to claim 4, in which the central layer is bonded to the outer layers by dielectric heating.
Claim 8
Dependent Claim
26 words
A composite insulation material according to claim 1, in the form of complementary pairs of channel section members, adapted to fit together to form a sleeve.
Claim 9
Dependent Claim
16 words
A composite insulation material according to claim 1, in which the micaceous material comprises mica paper.
Claim 10
Dependent Claim
16 words
A composite insulation material according to claim 1, in which the micaceous material comprises flake mica.
References Cited (Backward Citations)
US3189681A
Cited
GB1257501A
Cited
GB1314546A
Cited
US3841959A
Cited
US4033805A
Cited
US4085250A
Cited
US4013987A
Cited
US4091139A
Cited
US4273825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |