US3671906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winding formers for use in the manufacture or rotor assemblies for dynamo electric machines
Assignee: Individual
•
Filing: 1970-10-29
•
Granted: 1972-06-20
•
Expires: 1990-10-29
Abstract
Abstract A winding former including a tubular, flexible cylindrical portion having an integral peripheral outwardly extending flange at each end thereof. The cylindrical portion and the flanges are formed with a split which extends the full length of the former so that the former can be compressed radially. One of the flanges has a hole through which one end of a coil wound on the former can extend in use.
Inventors
- 👤 John Barry Hodges
- 👤 Gordon Howard Maybury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:46
CPC Classifications
H; H02; H02K; H02K3/00; H02K3/04; H02K3/18; H02K3/46; H02K3/52; H02K3/527; H02K3/528
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A winding former for use in the manufacture of a rotor assembly for a dynamo electric machine including a one piece, tubular, flexible, longitudinally split cylindrical portion having a pair of integral peripheral, outwardly extending radially split flanges at opposite ends thereof respectively, the splits in the flanges being continuous with the split of the cylindrical portion, and one of the flanges having a hole therein through which one end of a coil wound on the former can extend in use.
Claim 2
Dependent Claim
81 words
A winding former for use in the manufacture of a rotor assembly for a dynamo electric machine including a one piece, tubular, flexible, longitudinally split cylindrical portion having a pair of integral peripheral, outwardly extending radially split flanges at opposite ends thereof respectively, the splits in the flanges being continuous with the split of the cylindrical portion, and one of the flanges having a hole therein through which one end of a coil wound on the former can extend in use.
Claim 3
Dependent Claim
29 words
A former as claimed in claim 1 wherein the wall of said hole in said one flange is extended to define a hollow spigot projecting outwardly from the flange.
Claim 4
Dependent Claim
107 words
A former as claimed in claim 1 wherein said one flange has an open ended slot therein one wall of which extends generally radially and the other wall of which extends at an acute angle to said one wall, said other wall having a cut away portion adjacent the closed end of the slot the cut away portion defining a notch in which the first free end of the wire can be engaged at the commencement of the winding of a coil on the former, the notch serving in use to prevent the first convolution of the coil from riding up said one flange of the former.
References Cited (Backward Citations)
GB941078A
Cited
US3252025A
Cited
US3112898A
Cited
US3305740A
Cited
US3423619A
Cited
FR1468136A
Cited
FR1551658A
Cited
US3493800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |