Lighting and/or indicating apparatus for use in foggy conditions
US5349267A · kind A · utility
14Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Mar 31, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A lighting and indicating apparatus for a motor vehicle, for use in poor visibility. The unit includes a fog lamp and apparatus for automatically detecting the presence of poor visibility. The control system for automatic control of the lighting and indicating apparatus includes a humidity detecting circuit and an optical visibility detecting circuit, the outputs from which are combined by a combining circuit, the combined signal then being processed so as to control lighting or extinction of the fog lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.