Patent attributes
An emergency alarm system is disclosed as including a base unit 9, adapted to be installed in an architectural structure at an area attracting public attention, which incorporates a temperature sensor 29, a gas sensor 31, a sound sensor 33 and a vibration sensor 35 and includes a transmitter 39, a receiver 41, a sound generator 37 and a display board 27; a mobile handset 23, carried by a person for self-defense, which incorporates a temperature sensor 51 and a gas sensor 53 and includes a transmitter 59, a receiver 61, a sound generator 55 and a light source 57; and infrared ray sensors 13, installed in respective rooms in the architectural structure, which incorporates a temperature sensor 69 and a gas sensor 71 and includes a transmitter 73; wherein when one of the sensors of the base unit 9, the mobile handset 23 and the infrared ray sensors 13 detects an abnormal signal under an emergency condition, the base unit 9, the mobile handset 23 and the infrared ray sensors 13 mutually communicate with each other through the associated transmitters and receivers.
