Warning device status circuit including a status output device
US6720883B2 · kind B2 · utility
20Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Jun 3, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B5/36
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A warning device including a status and function indicator circuit for indicating the status and function of the warning device. In a visual warning device such as a strobe light, the status and function indicator circuit includes a status output device such as an LED. The LED and associated circuitry are configured to indicate both proper operation of the visual warning device and, in the event of a device failure, will indicate whether the fault lies with circuitry for the visual warning device or simply with a warning output device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.