US3340414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamo-electric machines
Assignee: CAV Ltd
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Filing: 1965-08-17
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Granted: 1967-09-05
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Expires: 1985-08-17
Abstract
No abstract record available.
Inventors
- 👤 Woodman Leonard James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:34
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/32; H02K3/325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
MEANS FOR INSULATING THE FIELD COIL ELECTRICALLY FROM A POLE PIECE HAVING A HEAD THEREON AND YOKE OF A DYNAMOELECTRIC MACHINE OF THE KIND SPECIFIED COMPRISING A PREFORMED RING OF INSULATING MATERIAL, SAID RING HAVING A CHANNEL-SHAPED CROSS-SECTION EMBRACING THE COIL, WITH THE BASE PORTION OF SAID RING DISPOSED AGAINST THE HEAD OF THE POLE PIECE AND THE WALLS OF SAID RING EXTENDING TOWARDS THE YOKE, AND A PREFORMED APERTURED SHIELD OF INSULATING MATERIAL LYING AGAINST THE INTERNAL PERIPHERY OF THE YOKE TO CLOSE THE OPEN SIDE OF THE CHANNEL-SHAPED RING.
Claim 2
Dependent Claim
91 words
MEANS FOR INSULATING THE FIELD COIL ELECTRICALLY FROM A POLE PIECE HAVING A HEAD THEREON AND YOKE OF A DYNAMOELECTRIC MACHINE OF THE KIND SPECIFIED COMPRISING A PREFORMED RING OF INSULATING MATERIAL, SAID RING HAVING A CHANNEL-SHAPED CROSS-SECTION EMBRACING THE COIL, WITH THE BASE PORTION OF SAID RING DISPOSED AGAINST THE HEAD OF THE POLE PIECE AND THE WALLS OF SAID RING EXTENDING TOWARDS THE YOKE, AND A PREFORMED APERTURED SHIELD OF INSULATING MATERIAL LYING AGAINST THE INTERNAL PERIPHERY OF THE YOKE TO CLOSE THE OPEN SIDE OF THE CHANNEL-SHAPED RING.
References Cited (Backward Citations)
US2764802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |