Traffic control device for street vehicles
US4851832A · kind A · utility
Inventor
Key dates
| Filing date | Oct 5, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Oct 5, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/095
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to a control device for vehicular street traffic, including a signal disc which consumes very little energy. This signal disc is provided with signal webs separated by deep grooves and with a diffusely reflecting color coating. Pivotal slats are disposed in a frame in front of the signal disc. If the signal disc is displaced with respect to the frame, the slats are pivoted upwardly and push themselves completely into grooves. The signal disc is therefore visible at any observation angle. At dusk or at night, the signals may be given by suitably disposed, dot-shaped, colored light sources in the form of light emitting diodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.