Emergency signal control unit has stationary central unit, wrist strap sensor, and central unit which transmits emergency signal if no portable transmitter position changes are detected within given period

摘要

The arrangement has a stationary central unit (1) in communication with a device (17) for receiving an emergency signal. The central unit determines the spatial position changes of a portable transmitter and transmits an emergency signal if no position changes are detected within a defined period. The stationary central unit functions can be integrated into a telephone system or mobile telephone.