US3852137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel shaped laminated high temperature slot wedge for dynamoelectric machines
Assignee: General Electric Co
•
Filing: 1972-09-18
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Granted: 1974-12-03
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Expires: 1992-09-18
Abstract
Abstract A rigid, laminated, thin ''''slot wedge'''' construction is described along with the method for fabricating it from flexible, normally difficult to form plastics. The laminated wedge is channel shaped with well defined corners to provide firm seating of the wedge in the slots of a dynamoelectric machine. A rigid, laminated channel shaped slot wedge having excellent corner definition is produced from thin, flexible high temperature plastics such as ''''Kapton'''' polyimide film or ''''Nomex'''' polyamide sheets by laminating them with an adhesive which is rigid when cured. The laminate is baked and the adhesive cured while it is held in the desired channel form by a clamping fixture. This imparts the desired rigidity and long term corner definition to the wedge while yet retaining the desired high temperature qualities of the individual laminations.
Inventors
- 👤 R Balke
- 👤 D Cipriani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:36
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; H02K3/487; H02K15/00; H02K15/13; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31721
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
17 words
COATING A PLURALITY OF THIN, RESILIENT, HIGH TEMPERATURE POLYAMIDE FILMS WITH A CURABLE, EPOXYLATED, NOVOLAC, RESIN ADHESIVE;
Claim 2
Dependent Claim
17 words
COATING A PLURALITY OF THIN, RESILIENT, HIGH TEMPERATURE POLYAMIDE FILMS WITH A CURABLE, EPOXYLATED, NOVOLAC, RESIN ADHESIVE;
Claim 3
Dependent Claim
13 words
A PROCESS FOR FABRICATING A CHANNEL-SHAPED, LAMINATED, SLOT WEDGE COMPRISING THE STEPS OF:
Claim 4
Dependent Claim
13 words
A PROCESS FOR FABRICATING A CHANNEL-SHAPED, LAMINATED, SLOT WEDGE COMPRISING THE STEPS OF:
Claim 5
Dependent Claim
27 words
PRESSING TOGETHER SAID PLURALITY OF POLYIMIDE FILMS, SAID POLYIMIDE FILMS HAVING THEIR CONTACTING SURFACES COATED WITH THE UNCURED EPOXYLATED NOVOLAC RESIN ADHESIVE TO FORM A FLAT LAMINATE,
Claim 6
Dependent Claim
27 words
PRESSING TOGETHER SAID PLURALITY OF POLYIMIDE FILMS, SAID POLYIMIDE FILMS HAVING THEIR CONTACTING SURFACES COATED WITH THE UNCURED EPOXYLATED NOVOLAC RESIN ADHESIVE TO FORM A FLAT LAMINATE,
Claim 7
Dependent Claim
27 words
Pressing together said plurality of polyimide films, said polyimide films having their contacting surfaces coated with the uncured epoxylated novolac resin adhesive to form a flat laminate,
Claim 8
Dependent Claim
27 words
Pressing together said plurality of polyimide films, said polyimide films having their contacting surfaces coated with the uncured epoxylated novolac resin adhesive to form a flat laminate,
Claim 9
Dependent Claim
14 words
Forcing the laminate and the as yet uncured adhesive into the desired channel shape,
Claim 10
Dependent Claim
14 words
Forcing the laminate and the as yet uncured adhesive into the desired channel shape,
Claim 11
Dependent Claim
14 words
FORCING THE LAMINATE AND THE AS YET UNCURED ADHESIVE INTO THE DESIRED CHANNEL SHAPE,
Claim 12
Dependent Claim
14 words
FORCING THE LAMINATE AND THE AS YET UNCURED ADHESIVE INTO THE DESIRED CHANNEL SHAPE,
Claim 13
Dependent Claim
49 words
HEATING THE LAMINATE FOR A PERIOD OF THREE HOURS AT A TEMPERATURE IN THE RANGE OF 160*-165*C TO CURE THE EPOXYLATED NOVOLAC RESIN ADHESIVE WHICH THE LAMINATE IS HELD IN THE SAID CHANNEL-SHAPE WHEREBY THE ADHESIVE BECOMES RIGID AND THE RESILIENT FILMS ARE RETAINED IN THE DESIRED CHANNEL CONFIGURATION.
Claim 14
Dependent Claim
49 words
HEATING THE LAMINATE FOR A PERIOD OF THREE HOURS AT A TEMPERATURE IN THE RANGE OF 160*-165*C TO CURE THE EPOXYLATED NOVOLAC RESIN ADHESIVE WHICH THE LAMINATE IS HELD IN THE SAID CHANNEL-SHAPE WHEREBY THE ADHESIVE BECOMES RIGID AND THE RESILIENT FILMS ARE RETAINED IN THE DESIRED CHANNEL CONFIGURATION.
Claim 15
Dependent Claim
49 words
Heating the laminate for a period of three hours at a temperature in the range of 160*-165*C to cure the epoxylated novolac resin adhesive which the laminate is held in the said channel-shape whereby the adhesive becomes rigid and the resilient films are retained in the desired channel configuration.
Claim 16
Dependent Claim
49 words
Heating the laminate for a period of three hours at a temperature in the range of 160*-165*C to cure the epoxylated novolac resin adhesive which the laminate is held in the said channel-shape whereby the adhesive becomes rigid and the resilient films are retained in the desired channel configuration.
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |