Coil frame assembly and the method of making same
US4698610A · kind A · utility
3Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1986 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | May 1, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4902
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A U-shaped ferro-magnetic pole frame has a circular recess formed in the closed end thereof with a plurality of peripherally spaced raised lugs formed in the recess. A tubular ferro-magnetic pole piece, adapted for insertion into an electrical coil, has one end thereof clamped temporarily against the lugs and current is passed therethrough for effecting resistance welding of the pole piece to the pole frame and the clamp is then removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.