Antitheft circuit for road vehicle - has RC timing circuit resetting flip=flop which terminates alarm after given time

摘要

The anti-theft circuit has an on/off switch for actuation, attitude detectors and several independently monitored circuits, which like the attitude detector are connected via triggers to an alarm generator. A timing circuit ensures that the alarm is discontinued a given time after it has been triggered. A flip-flop (13) is located between the parallel-coupled outputs of the triggers (11,12) and the input of the alarm generator (16). The output of the timing circuit (20) is connected to the reset input (68) of the flip-flop. The timing circuit input is connected to that of the alarm generator. The timing circuit consists of an RC circuit with a long charging and a short discharging time. The RC circuit resets the flip-flop after eg 30 seconds and thereby ends the alarm.