Emergency warning signal
US4736186A · kind A · utility
Inventor
Key dates
| Filing date | Oct 10, 1985 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Oct 10, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An emergency warning system for notifying passersby of the approach of an emergency vehicle to an intersection is provided. The system comprises a flashing light, a solar collector and a rechargeable battery electrically connected to the light. The device is obtained within a housing which is mounted near the distal end of a street light pole or stoplight. A switching mechanism is contained in the device which includes a radio receiver. A wireless transmitter carried by the emergency vehicle actuates the switching mechanism so as to provide warning of the approach of the vehicle to the intersection. Horns attached to the device also are actuated so as to provide an audible warning. Because of the use of the solar collector, no electrical connections are required between the device and the stop light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.