Illuminated sign housing construction
US3931689A · kind A · utility
54Cited by
8References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1974 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Jun 12, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2013/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
By providing a frame structure and two panels adapted for removable, interlocking mounting on the frame structure, a sign housing is obtained which is rapidly assemblable without the use of screws, clips, or other such fastening means. In the preferred embodiment, the sign housing is employed as an illuminated emergency exit sign, and can be flush-mounted with only one side viewable or mounted to ceilings or walls with both sides viewable. Also, an emergency power supply can be secured directly to the sign housing to provide a complete independent package.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.