Triggering transducer apparatus for acoustic device
US5449964A · kind A · utility
Inventor
Key dates
| Filing date | May 23, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | May 23, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2230/275
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Disclosed is a triggering transducer for signaling external equipment from an acoustic device having a foundational structure and an acoustic member, The transducer includes a base for mounting to the foundational structure; an elastic beam member having an anchor portion supported relative to the base and having a beam extremity for limited area contact with the acoustic member; a piezoelectric element attached to the beam member between the beam extremity and the anchor portion for coupling bending strain from the beam member to the piezoelectric element in response to vibration of the acoustic member, the piezoelectric element being in proximate facing contact with an active portion of the beam member, the active portion being inclined at an angle .theta. from the acoustic member, the angle .theta. is between approximately 30.degree. and approximately 45.degree.; a first resilient member bonded over substantially the entire face area of the piezoelectric element for damping the element, the beam member being U-shaped between the anchor portion and the active portion, the first resilient member being located between the active and anchor portions of the beam member and connecting…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.