Location monitoring system

Details Location monitoring system Location monitoring system

1993-07-26

1994-10-18

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

340539, 340573, G01S 1374

Patent

active

053572548

ABSTRACT:
A location monitoring system is provided having a radio frequency transmitter for a person or object and radio frequency receiver for someone to monitor movement of the person or object, the receiver sounding an alarm at a predetermined time after failure to receive a signal. The transmitter is made having an intermittent transmitted signal and the receiver is made having an off-timer to coordinate with the intermittent signal, the off times saving battery power. The radio frequency receiver has an electronic switching device controlled by the radio frequency transmitter for sounding an alarm. An antenna is located in part of the carrying strap of the transmitter. The radio frequency transmitter can have various devices for sounding the alarm.

REFERENCES:
patent: 4023138 (1977-05-01), Ballin
patent: 4593273 (1986-06-01), Narcisse
patent: 5245314 (1993-09-01), Kah, Jr.

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