Signal device having prolonged illumination means
US4161388A · kind A · utility
5Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1977 |
| Grant date | Jul 17, 1979 |
| Priority date | — |
| Expiry date | Mar 17, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V9/45
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flashlamp signal device which includes an illumination means for providing a prolonged, visible signal after actuation of each of the device's flashlamps. The illumination means may be in the form of a phosphor coating within the device or on an adjacent, movable panel, or the phosphor may be impregnated within the light-transmitting housing or support structure of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.