Control circuit for a vibrating membrane
US6380847B1 · kind B1 · utility
1Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | May 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K9/15
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present invention relates to a control circuit of a vibrating membrane excited by a solenoid in series with a d.c. supply and a controlled switch. A capacitor is disposed across a series circuit including the solenoid and the switch associated with opening means in the vicinity of a zero crossing of the current in the inductance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.