Anti-theft device for protecting electronic equipment

Details Anti-theft device for protecting electronic equipment Anti-theft device for protecting electronic equipment

1995-04-11

1996-06-25

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340539, 340540, 340691, 34082534, G08B 1322

Patent

active

055304311

ABSTRACT:
Security (e.g., theft-disincentive) for portable electronic appliances is provided by integrating a decoder into the power supply of an electronic appliance which prevents the electronic appliance from being powered up in the absence of a unique code impressed by an emitter on the power lines feeding power to the electronic appliance, and permits the electronic appliance having a decoder to be powered up (i.e., power-uppable) only in the presence of the unique code. Electronic appliances having the detector incorporated (e.g., integrated) therein are termed "protected equipment". The emitter may be "fixed" by hard-wiring same to the power lines in a household (e.g., behind a switch or receptacle face plate), or may be "portable") so that the user can transport and use (e.g., power up) the protected equipment at an other location simply by plugging the emitter into a receptacle at the other location and located in a safe place. The detector is integrated into the protected equipment in such a manner that bypassing its function (or removing the decoder) will render the equipment inoperable (or, would be cost prohibitive).

REFERENCES:
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patent: 4494114 (1985-01-01), Kaish
patent: 4584570 (1986-04-01), Dotson
patent: 4680574 (1987-07-01), Ruffner
patent: 4686514 (1987-08-01), Liptak, Jr. et al.
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patent: 4987406 (1991-01-01), Reid
patent: 5021779 (1991-06-01), Bisak
patent: 5034723 (1991-07-01), Maman
patent: 5059948 (1991-10-01), Desmeules
patent: 5231375 (1993-07-01), Sanders et al.

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