Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1985-09-18
1993-09-14
Hellner, Mark
Communications: electrical
Condition responsive indicating system
With particular coupling link
340573, G08B 108
Patent
active
052453146
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 said person or object, said 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 said intermittent signal, said off times saving battery power. The radio frequency receiver has an electronic switching means controlled by said radio frequency transmitter for sounding an alarm. An antenna is located in part of the carrying strap of said transmitter. The radio frequency transmitter can have various devices for sounding the alarm.
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Hellner Mark
McCarthy Jack N.
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