ES247246U - Anti-theft alarm device (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Anti-theft alarm device, which being of special application in motor vehicles and with a universal use, essentially is characterized by being constituted from a block of detection of increase of consumption of direct current, which is followed by an activation block and control that precedes a timing stage, which controls the performance of a dual power stage and there is an optical indication of operation, provided that the detection block consists of a transistor, whose base is connected to the active pole of the battery electrical, while its emitter circuit is controlled by the discharge of a condenser and its collector is connected, through a capacitor and a diode, to the door of a thyristor, which is part of the detection block and controls the passage of current to the rest of the device constituting the timer stage from a transistor, whose base is controlled by a conjunt or rc and whose collectors susceptible to polarize the double power stage comprising two pairs of transistors, mounted on current amplifier, and whose outputs have opposite signs, there being a transistorized stage for the supply of a light indicator, all with the particularity that the anode of the thyristor receives its member from a switch of two circuits, capable of simultaneously deriving the ignition circuit of the vehicle to earth. (Machine-translation by Google Translate, not legally binding)