Patent US3740601A successfully refreshed from Google Patents.
US3740601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamoelectric machine slot wedge and filler locking means
Assignee: Westinghouse Electric Corp
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Filing: 1971-04-26
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Granted: 1973-06-19
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Expires: 1991-04-26
Abstract
Abstract For retention of a coil in dynamoelectric machine core slots, a slot wedge is provided with a compressible end that is normally oversized in relation to the slot width. The wedge is compressed when driven through the slot. The oversized portion then expands when it reaches the first vent duct and locks the wedge in the slot. Another feature is to use a flexible insulating tape between the coil and the slot filler strips with ends extending from the slot so that they can be wrapped around the ends of the filler strips and be secured by a locking type wedge, which may be as described above, at each end of the stack.
Inventors
- 👤 R Amasino
- 👤 P Johrde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:58
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/48; H02K3/487
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A dynamoelectric machine comprising: a core comprising a plurality of stacked packs of laminations, including first and second end packs and at least one interior pack, with a ventilation duct between adjacent ones of said packs; a slot in said core extending through said plurality of core packs; a coil disposed in said slot; means for retaining said coil in said slot including a plurality of slot wedges of insulating material disposed in laterally positioned grooves near the opening of said slot over said coil, said plurality of slot wedges including first and second locking slot wedges in said first and second end packs, respectively, and at least one interior slot wedge in said at least one interior pack, one end of each of said locking slot wedges being resiliently compressible and having lateral projections that lock said wedge in position by being secured between an end of an interior slot wedge and a face of one of said end packs, said at least one interior slot wedge having substantially uniform lateral dimensions.
Claim 2
Dependent Claim
173 words
A dynamoelectric machine comprising: a core comprising a plurality of stacked packs of laminations, including first and second end packs and at least one interior pack, with a ventilation duct between adjacent ones of said packs; a slot in said core extending through said plurality of core packs; a coil disposed in said slot; means for retaining said coil in said slot including a plurality of slot wedges of insulating material disposed in laterally positioned grooves near the opening of said slot over said coil, said plurality of slot wedges including first and second locking slot wedges in said first and second end packs, respectively, and at least one interior slot wedge in said at least one interior pack, one end of each of said locking slot wedges being resiliently compressible and having lateral projections that lock said wedge in position by being secured between an end of an interior slot wedge and a face of one of said end packs, said at least one interior slot wedge having substantially uniform lateral dimensions.
Claim 3
Dependent Claim
27 words
The subject matter of claim 1 wherein: said resiliently compressible end of each of said locking slot wedges is provided with at least one longitudinally extending groove.
Claim 4
Dependent Claim
112 words
A dynamoelectric machine comprising: a core including a plurality of spaced packs of metallic laminations; a slot in said core; a coil in said slot; means for securing said coil in said slot including at least one slot filler of insulating material disposed over said coil and at least one slot wedge member of insulating material disposed over said filler and engaged within grooves in the lateral surfaces of said slot, and a layer of flexible insulating material disposed between said slot filler and said coil and wrapped longitudinally around each end of said slot filler and under an end slot wedge that is securely locked in position to prevent longitudinal movement.
Claim 5
Dependent Claim
112 words
A dynamoelectric machine comprising: a core including a plurality of spaced packs of metallic laminations; a slot in said core; a coil in said slot; means for securing said coil in said slot including at least one slot filler of insulating material disposed over said coil and at least one slot wedge member of insulating material disposed over said filler and engaged within grooves in the lateral surfaces of said slot, and a layer of flexible insulating material disposed between said slot filler and said coil and wrapped longitudinally around each end of said slot filler and under an end slot wedge that is securely locked in position to prevent longitudinal movement.
Claim 6
Dependent Claim
58 words
The subject matter of claim 3 wherein said end slot wedge comprises a flat member of relatively rigid insulating material with one end being resiliently compressible and with lateral projections so that when in position in said grooves in an end one of said packs of said core the lateral projections expand within the space between adjacent packs.
Claim 7
Dependent Claim
28 words
The subject matter of claim 4 wherein the compressibly resilient end of said end slot wedge is provided with longitudinal grooves from said end with said lateral projections.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |