Method of making a wound core for an electric transformer
US4467632A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1982 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Apr 5, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In this method, a plurality of elongated sheets of magentic steel are provided, and these sheets are wound in superposed relationship about an arbor, thereby forming an annulus of gradually increasing diameter about the arbor. As the sheets are so wound, any telescoping action by the sheets and the direction thereof are sensed. Following the occurrence of a predetermined amount of said telescoping in a sheet, I provide sheets that subsequently enter the annulus with thickening means effectively thickening said subsequent sheets at one side relative to their other side, said one side being located at a side of the thickened sheet's longitudinal center-line opposite to the direction in which said telescoping occurs. The article made by this method is also disclosed and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.