Patent Number: 6,166,642

Title: Electronic tracing system

Abstract: An electronic tracing system 10 is provided for sensing when a child moves more than a predetermined distance from a guardian. The system comprises a first module 20 for attaching to the child and a second module 30 which is carried by the guardian. The first module is adapted alternately to broadcast location signals and change to a receiving mode between the broadcasts. The second module is adapted to detect the location signals and includes means 200 for processing the location signals to determine whether the distance apart of the modules exceeds the predetermined distance. If the predetermined distance is exceeded then a buzzer 140 is activated and an LED 150 flashes to inform the guardian of this. The guardian can then press a push button switch 160 on the second module to transmit an alarm signal to the first module so as to cause a connected smoke canister 105 to emit smoke.

Inventors: Farshid; Koopal (Hammersmith, London W68JT, GB)


International Classification: G08B 5/40 (20060101); G08B 5/00 (20060101); G08B 21/02 (20060101); G08B 21/00 (20060101); G08B 023/00 ()

Expiration Date: 12/26/2017