Motor vehicle rear lighting system
US3958149A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1975 |
| Grant date | May 18, 1976 |
| Priority date | — |
| Expiry date | Apr 30, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/22
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A motor vehicle rear lighting system comprises first and second lamp filaments in a single bulb envelope, the first lamp filament having a greater resistance than that of the second lamp filament. One or more electrical switches are operable, in one position, to connect the lamp filaments in series with a battery, and, in another position, to complete the circuit from the battery to the second lamp filament without the first lamp filament in series therewith. The arrangement is such that, in said one position of the one or more switches, the first lamp filament becomes luminous and, in said another position of the switch means, the second lamp filament becomes luminous. In one embodiment, a first lamp filament by-pass is provided and, in said another position of the electrical switch, the circuit to the second lamp filament is completed via the by-pass. In another embodiment, the electrical switches are arranged to connect the lamp filaments in parallel when the switches are in their said another position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.