Patent ID: 7158025

Claim:
An emergency alarm system comprising: a base unit, adapted to be installed in an architectural structure at an area attracting public attention, which includes a temperature sensor, a gas sensor, a sound sensor, a vibration sensor, a transmitter, a receiver, a sound generator and a display board; a mobile handset carried by a person for self-defense and having a temperature sensor, a gas sensor, a transmitter, a receiver, a sound generator and a light source; and infrared ray sensors installed in respective rooms in the architectural structure and each having a temperature sensor, a gas sensor, a transmitter and a receiver; wherein when one of the sensors of the base unit, the mobile handset and the infrared ray sensors detects an abnormal signal under an emergency condition, the base unit, the mobile handset and the infrared ray sensors mutually communicate with each other through the transmitters and the receivers of the base unit, the mobile handset and the infrared ray sensors, respectively.