Patent ID: 6804169
Filing Date: 2004-10-12
Classification: G04G,G04R

Abstract:
A security system comprising:a) a portable, wrist-wearable timepiece comprising: a timekeeping circuit for calculating a time of day and for generating a time indicating signal representing said time of day; wireless transmitter means for transmitting data signals including a time reset signal generated by the timekeeping circuit that does not include time of day information; and processing means adapted to cause the transmitter means to transmit the time reset signal at the same predetermined time every day; b) a control panel comprising a clock function; c) a wireless receiver in communication with the control panel for receiving the time reset signal from the wireless transmitting means; and d) a plurality of sensor devices in communication with the control panel; wherein the control panel is adapted to reset the clock function to the same predetermined time as in the timepiece on the receipt of the time reset signal from the timepiece that is received via the wireless receiver; whereby the timepiece and the control panel are in time synchronization as a result thereof at the same time every day without having to exchange time of day information.