Emergency roadside telephone system
US4176254A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1977 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Dec 27, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An emergency roadside telephone system includes a plurality of self-powered, emergency telephone terminals positioned at remote locations, such as along roadways, to permit communication with a central station in order to obtain emergency assistance. Each emergency telephone terminal has a transmitter and a receiver for communication with the central station, a handset for providing voice communication and a plurality of emergency switches carrying symbols representative of various types of emergency assistance required such that a caller can request emergency assistance either by voice communication with an operator at the central station or, if there is a language barrier, by actuating the emergency switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.