US3739212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the wedging of coils of rotors of electric machines
Assignee: Cegelec SA
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Filing: 1971-10-04
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Granted: 1973-06-12
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Expires: 1991-10-04
Abstract
Abstract The invention relates to the wedging of coils on the rotors with salient poles of electric machines with wedges put between the coils. The wedges are kept in place through studs which connect them through ball-and-socket joints to attachment pieces resting under two adjacent coils. Such a wedging is especially useful in long machines wherein the rotor is subjected to extensive heating.
Inventors
- 👤 R Koelbel
- 👤 Vaulx J De
- 👤 R Gillet
- 👤 C Lehuen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:43
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/46; H02K3/52; H02K3/527
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
In a salient Pole dynamo electric machine, a device for wedging coils on the rotors, comprising wedges (4) placed between the coils (1); attachment pieces (6) located beneath two adjacent coils; studs (5) connecting the wedges (4) and the attachment pieces (6) to secure them together while exerting upon them radial stress toward the outside of the rotor. the improvement comprising a ball and socket joint (7) connecting the corresponding attachment piece (6) and the stud (5).
Claim 2
Dependent Claim
77 words
In a salient Pole dynamo electric machine, a device for wedging coils on the rotors, comprising wedges (4) placed between the coils (1); attachment pieces (6) located beneath two adjacent coils; studs (5) connecting the wedges (4) and the attachment pieces (6) to secure them together while exerting upon them radial stress toward the outside of the rotor. the improvement comprising a ball and socket joint (7) connecting the corresponding attachment piece (6) and the stud (5).
Claim 3
Dependent Claim
23 words
In the machine of claim 1, a second ball and socket joint (8) located between the attachment pieces (6) and the coils (1).
Claim 4
Dependent Claim
43 words
In the machine of claim 2, an intermediate support element (8'') located between the coil (1) and the corresponding attachment piece (6), said intermediate element and said attachment piece, at their matching surfaces, being formed with said second ball and socket joint (8).
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |