Method of making a self-supporting wire coil
US4053975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1976 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Aug 31, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wire is wound on a coil body form about a removable mandrel in a first layer in which the turns abut one another. A guide ring reverses the direction of lead of the wire to form a second, overlying layer in which the turns are spaced a short distance apart from one another. The final turns of the outer layer engage about the coil form. A casting agent applied to the coil penetrates the turns of the second and first layers and is hardened. The mandrel is removed and the coil is self-supporting, for use as in a moving-coil motor. A fiberglass sheet may optionally be applied about the first layer before the second layer is wound thereover to increase the strength of the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.