Anti-theft alarm system for portable computer

Details Anti-theft alarm system for portable computer Anti-theft alarm system for portable computer

2006-09-22

2009-06-16

Nguyen, Phung (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

Reexamination Certificate

active

07548160

ABSTRACT:
An anti-theft alarm system includes a detecting switch portion including a first switch and a second switch, a keyboard controller (KBC), and a key of a keyboard of the portable computer for enabling the alarm system. If the portable computer is moved without deactivation of the alarm system, the second switch opens, causing a change of a voltage at the first switch which is detected by the KBC, the KBC thereby sends an alarm control signal to an audio system of the portable computer, and the audio system produces an audible sound for a theft deterrence effect.

REFERENCES:
patent: 4985695 (1991-01-01), Wilkinson et al.
patent: 5578991 (1996-11-01), Scholder
patent: 5936526 (1999-08-01), Klein
patent: 6172607 (2001-01-01), McDonald
patent: 7245175 (2007-07-01), Morita
patent: RE40012 (2008-01-01), Patterson

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