Audible, piezoelectric signal with integral visual signal
US7920069B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2008 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Aug 14, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B7/06
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A combined and integrated audible and visual signal. A signal case is constructed of a light transmissive material and includes an exposed front end cover with one or more sound transmitting apertures and a tubular wall extending transversely from the exposed end cover for extending through a hole in a mounting panel. A transducer is mounted within the tubular wall and includes a diaphragm that is spaced from the exposed cover. Light sources are mounted to face the diaphragm. The tubular wall in the region between the cover and a plane transverse to the tubular wall through the diaphragm is, in the axial direction, smoothly continuous with no angled bends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.