Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-02-03
2000-01-04
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340539, 340571, 3405728, G08B 1314
Patent
active
060114711
ABSTRACT:
An alarm system for an electronic apparatus with a slot comprises a radio transmitter unit and a radio receiver unit. The radio transmitter unit can be carried by a user, including an antenna for transmitting a radio code signal and a control switch for controlling power on/off of the radio receiver unit. The radio receiver includes a security switch controlled to turn on/off the radio receiver unit when inserting/removing from the slot of the electronic apparatus. The radio receiver unit automatically outputs an alarm signal when moved away from the electronic apparatus beyond a predetermined distance due to being incapable of receiving the code signal from the radio transmitter unit.
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Hofsass Jeffery A.
Trieu Van T.
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