Corona-effect sound emitter
US4464544A · kind A · utility
19Cited by
14References
12Claims
0Family size
Inventor
Key dates
| Filing date | Jul 23, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Jul 23, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S336/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A corona effect sound emitter including a discharge electrode producing corona discharge and surrounded by a spherical counter electrode is partially inserted in a housing which encloses a high frequency generator, modulation transformer and a power supply transformer of which the power supply transformer supplies the discharge electrode with electric current. A thin plate of a magnetic metal transversally extends in the housing so that secondary windings of the transformers are positioned above the plate and are separated from the primary windings of the transformers disposed below the plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.