Alarm system

Details Alarm system Alarm system

1998-11-18

2000-02-15

Lieu, Julie

Communications: electrical

Condition responsive indicating system

With particular coupling link

3405731, 3405734, 340539, 340534, 340527, 340529, 34082536, 34082569, 34082572, 109 38, 455 38, 455404, 455 382, 455507, G08B 100

Patent

active

060257792

ABSTRACT:
An alarm system includes a trigger unit, a recognition unit, and an alarm unit. The trigger unit is operated by the user to output a radio wave to the recognition unit upon an emergency, causing the recognition unit to output a radio signal in triggering the alarm unit to output an alarm signal to the outside, asking for help.

REFERENCES:
patent: 4157540 (1979-06-01), Oros
patent: 5223818 (1993-06-01), Polo
patent: 5568126 (1996-10-01), Andersen et al.

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