Method of making a transformer core comprising strips of amorphous steel wrapped around the core window
US5315754A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Oct 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/5317
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Groups of amorphous steel strips, cut to appropriate length from a composite strip, are stacked in longitudinally-staggered relationship to form packets. The groups are made up by a process that comprises a pre-spooling operation that results in the strips and groups in each packet adhering together, even though dry. The individual packets are fed successively into a belt nester that includes a rotatable arbor and wrapping means that wraps the packets in superposed relationship about the arbor as the arbor rotates, thereby building up a hollow core form. The above-described adhesive effect precludes the strips and groups from shifting longitudinally while the packets are being wrapped about the arbor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.