Electronic article surveillance security system

Details Electronic article surveillance security system Electronic article surveillance security system

G - Physics

08

B

340/125, 325/32

G08B 13/24 (2006.01) G08B 13/14 (2006.01)

Patent

CA 1219652

Abstract of the Disclosure Our electronic article surveillance security system invention is comprised of three interrelated components that, when used in conjunction with one another, embody the invention. A radio frequency transmitter comprising a radio frequency oscillator which generates a specific radio frequency using a crystal and transistor. The radio frequency is fed to a linear amplifier which amplifies the radio frequency sending same to the remote directional antenna, in turn, radiating the radio frequency within a specified area. An alarm device with radio frequency receiver that rejects all but the transmitted radio frequency, amplifying the correct radio frequency and converting same to a direct current voltage, through a radio frequency detector and relay driver which sends a voltage of sufficient amplitude to actuate the self latching audio tone generator, developing a tone to a speaker which broadcasts an audible tone. This audible tone will continue to operate, using a self contained battery power source, until it is reset, placed in a quiescant state, using an external power source. The alarm device is equipped with two sets of normally open contacts, either set when monentarily actuated, will directly send a voltage of sufficient amplitude to actuate the self latching audio tone generator, developing a tone to a speaker which broadcasts an audible tone. A negator, which operates using an external power supply, is the external power source to reset the alarm device. The alternating current, provided by the external power supply, provides a regulated direct current power supply. The negator, when actuated using a double pole/single throw momentary on switch the contactors send a voltage to a 3 digit event counter using a light emitting display readout to advance same one count and, coincidently sending a voltage of sufficient amplitude through the attached extension cord and negator plug. The negator plus, when inserted into the negator jack of the alarm device, sends a voltage of sufficient amplitude to the self latching audio tone generator to reset same, returning it to a quiescant state.

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