System for monitoring and locating a person within a preselected distance from a base-station

A monitoring and locating system comprising:

• a base-station and a plurality of remote transceivers, said base-station provided with means for generating a plurality of distinct interrogation signals for receipt by said plurality of remote transceivers at a preselected interrogation distance from said base-station each of said plurality of distinct interrogation signals communicates with a respective one of said plurality of remote transceivers;
• said base-station provided with means for detecting and distinguishing between the receipt of a plurality of homing signals;
• said base-station provided with means for detecting the receipt or interruption of each of said plurality of distinct return signals generated by said plurality of remote transceivers and for alerting a user of said base-station of the interruption of each of said plurality of distinct return signals;
• said base-station provided with means for locating a source of said plurality of homing signals generated by said plurality of said remote transceivers;
• said plurality of remote transceivers each operable to detect one of said plurality of distinct interrogation signals within said preselected distance from said base-station;
• each one of said plurality of remote transceivers provided with means for generating a distinct return signal in response to receipt of a respective one of said distinct interrogation signals;
• each one of said plurality of remote transceivers provided with means for detecting the receipt or interruption of said interrogation signals and for alerting a user of one of said plurality of remote transceivers upon said detected interruption at said user's remote transceiver that said user's remote transceiver has moved beyond said preselected interrogation distance;
• and
• each one of said plurality of remote transceivers provided with means for generating a homing signal in response to moving beyond said preselected distance from said base-station.