Vehicle alarm circuit responsive to selected battery voltage transients专利检索-固态电池蓄电池电化学发生器电池与电池专利检索查询-专利查询网

Vehicle alarm circuit responsive to selected battery voltage transients

阅读：628发布：2023-09-05

专利汇可以提供Vehicle alarm circuit responsive to selected battery voltage transients专利检索，专利查询，专利分析的服务。并且An alarm circuit for providing an audible indication of unauthorized entry into a vehicle includes a sensing circuit, a solid state switching element and an internal energy source in an integral assembly. When the alarm circuit is enabled, the control port of the switching element responds via the sensing circuit to the negative voltage transient at the car battery upon entry (caused by the initial surge current to illuminate the interior courtesy lights) to render the switching element conductive, thereby applying the potential of an internal battery across a horn, buzzer or the like. In accordance with further aspects of the present invention, a charging circuit for the internal battery and apparatus for triggering an alarm responsive to a disconnection of the alarm circuit from the car or its battery are provided.，下面是Vehicle alarm circuit responsive to selected battery voltage transients专利的具体信息内容。

权利要求

1. In a vehicle-protecting alarm circuit operative in response to selected voltage transients at the vehicle battery terminals, the combination comprising controlled switching means having a main conduction port and a control port, a power source means independent of the vehicle battery, audible alarm and transfer switch means serially connected to said power source means and said main conduction port, saiD transfer switch means having a plurality of positions, means connected with and for selectively triggering said control port of said controlled switching means responsive to selected voltage transients at the vehicle battery terminals and responsive to disconnection of said alarm circuit therefrom, said selective triggering means comprises a series resonant circuit including a diode.

2. A vehicle-protecting alarm circuit in accordance with claim 1, wherein said selective triggering means includes capacitive coupling means and a capacitor discharging resistor connected to said capacitive coupling means.

3. A vehicle-protecting alarm circuit in accordance with claim 2, wherein said transfer switch means is key switch means.

4. A vehicle-protecting alarm circuit in accordance with claim 3, wherein said controlled switching means comprises a solid state control switch.

5. A vehicle-protecting alarm circuit in accordance with claim 1, wherein said selective triggering means includes capacitive coupling means and a capacitor discharging resistor connected to said capacitive coupling means.

6. A vehicle-protecting alarm circuit in accordance with claim 1, including charging means for charging said power source means, said charging means being serially connected to said power source through said transfer switch means when said transfer switch means is in one of its positions.

7. A vehicle-protecting alarm circuit in accordance with claim 6, wherein said transfer switch means is key switch means.

8. A vehicle-protecting alarm circuit in accordance with claim 7, wherein said power source means comprises a battery integral with said alarm circuit and distinct from said vehicle battery, and said key switch means comprises transfer switching means for selectively connecting said battery to one of said controlled switching mean ports or to said charging means.

9. A vehicle-protecting alarm circuit in accordance with claim 1, including periodic circuit interrupter means serially connected to said audible alarm means, said controlled switching means comprising a thyristor.

10. A vehicle-protecting alarm circuit in accordance with claim 9, wherein said thyristor is of the silicon bidirectional type.

11. A vehicle-protecting alarm circuit in accordance with claim 6, wherein said charging means includes a zener diode in said serial connection to said power source.

12. A vehicle-protecting alarm circuit in accordance with claim 3, wherein said controlled switching means comprises a silicon bidirectional tyristor, said power source means comprises a battery integral with said alarm circuit and distinct from said vehicle battery, charging means for charging said power source means, said key switch means comprises transfer switching means for selectively connecting said battery to one of said controlled switching means ports or to said charging means, periodic circuit interrupter means serially connected to said audible alarm means.

13. A vehicle-protecting alarm circuit in accordance with claim 12, including said charging means including a zener diode in said serial connection to said power source.

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Vehicle alarm circuit responsive to selected battery voltage transients

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