Duflex impedance shield for shape control in electromagnetic casting
US4265294A · kind A · utility
22Cited by
10References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1979 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | May 30, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D11/015
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A duplex impedance shield is disclosed which is used to effect improved shape control in the electromagnetic casting of molten metal or alloy. The shield is provided with a primary loop which substantially surrounds the upper portion of an electromagnetic casting station and a secondary loop attached thereto which serves to enlarge the air gap enclosed by the shield thereby increasing the impedance of the shield. The secondary loop of the shield may be provided with shunt means which can be manipulated to vary the inductance and/or the resistance of the shield thereby varying the impedance of the shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.