Use "emergency signal" in a sentence

1. Intelligent system for transmitting an emergency signal using a mobile phone and a method therefor

2. A person entering the area carries an alarm unit (30) which, when actuated, transmits an emergency signal.

3. In case of an accident or a breakdown, a corresponding emergency signal is transmitted to ask for help.

4. The alarm unit (180) includes another transmitter (187b) for transmitting an emergency signal indicative of an emergency condition.

5. Therefore, a driver can transmit an emergency signal from within the passenger compartment (4) in order to lower the risk of a secondary accident.