Patent US3758706A successfully refreshed from Google Patents.
US3758706A
Expired / Lapsed
US
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Insulated coils for electrical machines
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1972-04-03
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Granted: 1973-09-11
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Expires: 1992-04-03
Abstract
Abstract An insulated conductor or conductor bundle for electrical machines wherein the portion of the conductor or conductor bundle which is to be installed in the grooves of a lamination packet of the machine, is enclosed with an insulation material containing mica which is bound with a high percentage by weight of binder, while the arm portion of the conductor or conductor bundle is enclosed with an insulation material containing only mica or mica bound with a low percentage by weight of binder.
Inventors
- 👤 E Strauss
- 👤 S Foth
- 👤 H Kaltschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:15
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
In an insulated conductor or conductor bundle, for electrical machines in which the conductor or conductor bundle includes a first portion which is to lie within the grooves of a lamination packet of the machine and an arm portiOn which is connected to the first portion, and in which the conductor or conductor bundle is enclosed in a mica-containing insulating material, before being installed in the machine and impregnated with an impregnating resin which is subsequently hardened, the improvement wherein the insulating material provided for said first portion of the conductor or conductor bundle which is to lie within the grooves of the lamination packet of the machine includes mica which is bound with a high percentage by weight of binder, and the insulating material provided for said arm portion includes mica and from zero to at most a very small percentage by weight of binder relative to the percentage by weight of binder in the insulating material of said first portion.
Claim 2
Dependent Claim
162 words
In an insulated conductor or conductor bundle, for electrical machines in which the conductor or conductor bundle includes a first portion which is to lie within the grooves of a lamination packet of the machine and an arm portiOn which is connected to the first portion, and in which the conductor or conductor bundle is enclosed in a mica-containing insulating material, before being installed in the machine and impregnated with an impregnating resin which is subsequently hardened, the improvement wherein the insulating material provided for said first portion of the conductor or conductor bundle which is to lie within the grooves of the lamination packet of the machine includes mica which is bound with a high percentage by weight of binder, and the insulating material provided for said arm portion includes mica and from zero to at most a very small percentage by weight of binder relative to the percentage by weight of binder in the insulating material of said first portion.
Claim 3
Dependent Claim
69 words
Th insulated conductor or conductor bundle as defined in claim 1 wherein the conductor or conductor bundle further includes a discharge portion between the first portion and the arm portion, and wherein the discharge portion forms a transition zone from the insulating material having a high percentage by weight of binder to the insulating material having from zero to at most a very small percentage by weight of binder.
Claim 4
Dependent Claim
27 words
The insulation conductor or conductor bundle as defined in claim 2 wherein the insulating materials in the transition zone form offset layers with respect to each other.
Claim 5
Dependent Claim
27 words
The insulated conductor or conductor bundle as defined in claim 1 wherein a woven tape is provided between the conductor or conductor bundle and the insulating materials.
Claim 6
Dependent Claim
25 words
The insulated conductor or conductor bundle as defined in claim 1 wherein said insulating material having a high percentage by weight of binder is prepacked.
Claim 7
Dependent Claim
36 words
The insulated conductor or conductor bundle as defined in claim 1 wherein the percentage by weight of binder in said insulating material containing a high percentage of binder is between 30 and 50 percent by weight.
Claim 8
Dependent Claim
32 words
The insulated conductor or conductor bundle as defined in claim 1 wherein said insulating material containing mica and from zero to at most a very small percentage of binder contains only mica.
Claim 9
Dependent Claim
35 words
The insulated conductor or conductor bundle as defined in claim 1 wherein said insulating material containing mica and from zero to at most a very small percentage of binder contains 3-8 percent binder by weight.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |