Lighting system for car top sign
US4839975A · kind A · utility
9Cited by
4References
3Claims
0Family size
Inventor
Key dates
| Filing date | Jun 1, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jun 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F21/042
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A lighting system for a translucent plastic car top sign having three side panels forming a truncated triangular pyramid and a top is disclosed. A convex reflector surface depends from the top and has three electric lamps oriented to be aligned with the apexes of the triangular pyramid such that each panel is illuminated by overlapping of direct and reflected light from the lamps. A translucent diffuser dome may be disposed over the reflector and lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.