Apparatus for generating an audible tone
US5953436A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jul 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/345
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for generating a audible tone is disclosed. The apparatus includes a ferromagnetic container 105, a ferromagnetic pole 110, a coil 115, a first stationary lead wire 175, a second stationary lead wire 180, and a flexible ferromagnetic diaphragm 120. The ferromagnetic pole 110 is disposed within the ferromagnetic container 105. The coil 115 is encircling a portion of the ferromagnetic pole 110. The coil 115 has an input end 165 connected to a first stationary lead wire 175, configured to receive an electrical signal, and an output end 170 connected to a second stationary lead wire 180. The flexible ferromagnetic diaphragm 120 is disposed along the top edge 135 of the ferromagnetic container 105. The flexible ferromagnetic diaphragm 120 is configured to flex when magnetically attracted toward the ferromagnetic pole 110. As the flexible ferromagnetic diaphragm 120 flexes the first stationary lead wire 175 and the second stationary lead wire 180 will remain stationary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.