Sound actuated switch
US4690242A · kind A · utility
11Cited by
20References
7Claims
0Family size
Inventor
Key dates
| Filing date | Nov 19, 1986 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Nov 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/802
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A sound actuated detector comprising a microphone, an elastic cylinder having a flexible bottom adapted to fit tightly around the microphone with the sensing surface of the microphone fitting tightly against the flexible bottom, a mounting base connected to the surface of the cylinder having the flexible bottom, an elastic isolating medium arranged between the base and the surrounding surface to which the detector is attached, and a weight connected to the microphone having a mass such as to eliminate movement of the microphone in response to frequencies above a selected frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.