Magnetic article theft alarm

Details Magnetic article theft alarm Magnetic article theft alarm

1983-11-18

1986-04-22

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340568, 340574, G08B 1314

Patent

active

045845719

ABSTRACT:
A portable alarm device is positioned in a garment, bag or the like to protect valuable articles located therein, such as wallets. The device includes a casing provided with a power source and a circuit fed by said power source, the circuit including at least one magnetically sensitive element, and at least one signal member serially connected therewith, and a permanent magnetic body attached to the valuable article and cooperating with the at least one magnetically sensitive element to open and close the circuit. In a further refinement, two or more reed switches are connected in series and spaced apart a distance less than the range over which the permanent magnet can control one of the switches so the article can move about within a bag without causing an alarm.

REFERENCES:
patent: 3247502 (1966-04-01), Eberts
patent: 3277465 (1966-10-01), Potter
patent: 3295575 (1967-01-01), Young
patent: 3530451 (1970-09-01), Devine
patent: 3930249 (1975-12-01), Steck et al.
patent: 4374377 (1983-02-01), Saito et al.

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