Smoke chamber as audio chamber in audible alarm devices
US11961380B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2018 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | May 3, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A audible alarm device (AAD) having: a housing extending axially upwardly and radially outwardly, and having an axial bottom portion and an axial top portion, the top portion having a smoke chamber defined by: a top surface that is planar and having a first diameter, a bottom surface separating the top portion from the bottom portion, the bottom surface being planar and having a second diameter that is larger than the first diameter, a side surface connecting the top and bottom surfaces, and a circumferential opening in the side surface providing fluid egress to the smoke chamber, a piezo sounder disposed in the smoke chamber, radially centered within the top portion and axially proximate the top surface of the top portion, the piezo sounder configured to direct sound to the bottom surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.