| 摘要 |
The anti-theft apparatus comprises an alarm circuit connected to an intermittence circuit (31, 32, 33) in order to actuate the horn of the motor vehicle. The alarm circuit is controlled by a first circuit (29) capable of sensing the voltage drop of the battery of the motor vehicle, when a lamp lights up on opening a door of the motor vehicle, by a second circuit (26) sensitive to the closing of a contact following the starting of the engine, or by a third circuit (27) comprising a contact sensitive to the mechanical vibrations due to knocks or jolts imparted to the motor vehicle. The first circuit comprises a delayer (30) to enable the user to get into the motor vehicle. A general switch (18) can bypass all these circuits which become supplied through a timer circuit (28) to enable the user to get out of the motor vehicle. <IMAGE> |
