Antitheft device for vehicles

Claim 2

An electrical alarm system for vehicles comprising an electrically operated signaling device and a storage battery, electrical circuitry connecting said device to said battery including a switching relay, an energizing circuit for said relay comprising a switching gate and an actuator therefor with an actuating circuit, a door switch means in said actuating circuit for controlling the actuating circuit as the vehicle door is opened and closed, a storage capacitor, said switching gate being adapted to establish a connection between said battery and the input side of said storage capacitor, a first electrical switching circuit means operatively connected to said storage capacitor and responsive to a predetermined voltage build-up in said storage capacitor for establishing a connection with said switching relay whereby said switching relay is actuated to energize the device after a predetermined voltage build-up in said capacitor, a de-activating circuit comprising a normally closed relay connecting said battery to the input side of said storage capacitor, an actuator solenoid for said normally closed relay, a second storage capacitor, a second switching circuit means for establishing a connection between said last named solenoid and one side of said battery in response to a voltage build-up in said second storage capacitor, and an operator controlled switch for selectively energizing said second storage capacitor.

Claim 3

An electrical alarm system for vehicles comprising an electrically operated signaling device and a storage battery, electrical circuitry connecting said device to said battery including a switching relay, an energizing circuit for said relay comprising a switching gate and an actuator therefor with an actuating circuit, a door switch means in said actuating circuit for controlling the switching gate as the vehicle door is opened and closed, a storage capacitor, said switching gate being adapted to establish a connection between said battery and the input side of said storage capacitor, and an electrical switching circuit means operatively connected to said storage capacitor and responsive to a predetermined voltage build-up in said storage capacitor for establishing a connection with said switching relay whereby said switching relay is actuated to energize the signaling device after a predetermined voltage build-up in said capacitor, said switching circuit means having a switch situated in parallel disposition therewith and adapted for establishing a connection between said switching relay circuit and one side of said battery when the vehicle engine hood is opened, a de-activating circuit comprising a normally closed relay connecting said battery to the input side of said storage capacitor, an actuator for said normally closed relay, a second storage capacitor, a second switching circuit means for establishing a connection through said last named actuator from one side of said battery in response to a voltage build-up in said second storage capacitor, and an operator controlled switch for selectively energizing said second storage capacitor.

Claim 4

An electrical alarm system for vehicles comprising an electrically operated signaling device and a storage battery, electrical circuitry connecting said device to said battery including a switching relay, an energizing circuit for said relay comprising a switching gate and an actuator therefor with an actuating circuit, a door switch means in said actuating circuit for controlling the switching gate as the vehicle door is opened and closed, a storage capacitor, said switching gate being adapted to establish a connection between said battery and the input side of said storage capacitor, and an electrical switching circuit means operatively connected to said storage capacitor and responsive to a predetermined voltage build-up in said storage capacitor for establishing a connection with said switching relay whereby said switching relay is actuated to energize the signaling device after a predetermined voltage build-up in said capacitor, said switching circuit means having a switch situated in parallel disposition therewith and adapted for establishing a connection between said switching relay circuit and one side of said battery when the vehicle engine hood is opened, a de-activating circuit comprising a normally closed relay connecting said battery to the input side of said storage capacitor, an actuator for said normally closed relay, a second storage capacitor, a second switching circuit means for establishing a connection through said last named actuator from one side of said battery in response to a voltage build-up in said second storage capacitor, and an operator controlled switch for selectively energizing said second storage capacitor.

Claim 5

An electrical alarm system for vehicles comprising an electrically operated signaling device and a storage battery, electrical circuitry connecting said device to said battery including a switching relay, an energizing circuit for said relay comprising a switching gate and an actuator therefor with an actuating circuit, a door switch means in said actuating circuit for controlling the switching gate as the vehicle door is opened and closed, a storage capacitor, said switching gate being adapted to establish a connection between said battery and the input side of said storage capacitor, and an electrical switching circuit means operatively connected to said storage capacitor and responsive to a predetermined voltage build-up in said storage capacitor for establishing a connection with said switching relay whereby said switching relay is actuated to energiZe the signaling device after a predetermined voltage build-up in said capacitor, said switching circuit means having a switch situated in parallel disposition therewith and adapted for establishing a connection between said switching relay circuit and one side of said battery when the vehicle deck lid is opened, a de-activating circuit comprising a normally closed relay connecting said battery to the input side of said storage capacitor, an actuator for said normally closed relay, a second storage capacitor, a second switching circuit means for establishing a connection through said last named actuator from one side of said battery in response to a voltage build-up in said second storage capacitor, and an operator controlled switch for selectively energizing said second storage capacitor.

Claim 6

An electrical alarm system for vehicles comprising an electrically operated signaling device and a storage battery, electrical circuitry connecting said device to said battery including a switching relay, an energizing circuit for said relay comprising a switching gate and an actuator therefor with an actuating circuit, a door switch means in said actuating circuit for controlling the switching gate as the vehicle door is opened and closed, a storage capacitor, said switching gate being adapted to establish a connection between said battery and the input side of said storage capacitor, and an electrical switching circuit means operatively connected to said storage capacitor and responsive to a predetermined voltage build-up in said storage capacitor for establishing a connection with said switching relay whereby said switching relay is actuated to energiZe the signaling device after a predetermined voltage build-up in said capacitor, said switching circuit means having a switch situated in parallel disposition therewith and adapted for establishing a connection between said switching relay circuit and one side of said battery when the vehicle deck lid is opened, a de-activating circuit comprising a normally closed relay connecting said battery to the input side of said storage capacitor, an actuator for said normally closed relay, a second storage capacitor, a second switching circuit means for establishing a connection through said last named actuator from one side of said battery in response to a voltage build-up in said second storage capacitor, and an operator controlled switch for selectively energizing said second storage capacitor.

Claim 7

The combination as set forth in claim 1, wherein said first switching circuit means comprises a pair of transistors, the emitter of one transistor being connected to the base of the other transistor, the emitter for the other transistor being grounded, the collectors for both transistors being connected to one side of its associated switching relay and the base of said one transistor being connected to one side of its associated storage capacitor.

Claim 8

The combination as set forth in claim 2, wherein said switching circuit comprises a pair of transistors, the emitter of one transistor being connected to the base of the other transistor, the emitter for the other transistor being grounded, the collectors for both transistors being connected to one side of its associated switching relay solenoid and the base of said one transistor being connected to one side of its associated storage capacitor.