Motor vehicle security system
First Claim
1. A motor vehicle security system comprising a receiver unit, an alarm unit, and a transmitter unit respectively mounted in a motor vehicle and connected to a car battery of said motor vehicle, wherein said receiver unit is connected to said alarm unit and said transmitter unit by a power line, a control line and an earth line, and controlled to provide a check code to said alarm unit and said transmitter unit, said receiver unit been stopped from providing said check code when a door of the motor vehicle is opened by force;
- said alarm unit and said transmitter unit have a respective self-provided battery power supply and are triggered to produce an audio alarm signal and a radio alarm message respectively when receive no check code from said receiver unit, said radio alarm message being receivable to car radios.
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Abstract
A motor vehicle security system including a receiver unit, an alarm unit, and a transmitter unit respectively mounted in a motor vehicle and connected to a car battery of the motor vehicle, the alarm unit and the transmitter unit are respectively connected to the receiver unit, the receiver unit being controlled by a remote controller to provide a check code to the alarm unit and the transmitter unit, the receiver unit been stopped from providing the check code when a door of the motor vehicle is opened by force, the alarm unit and the transmitter unit having a respective self-provided battery power supply and being triggered to produce an audio alarm signal and a radio alarm message respectively when they receive no check code from the receiver unit, the radio alarm message being receivable to car radios.
19 Citations
5 Claims
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1. A motor vehicle security system comprising a receiver unit, an alarm unit, and a transmitter unit respectively mounted in a motor vehicle and connected to a car battery of said motor vehicle, wherein said receiver unit is connected to said alarm unit and said transmitter unit by a power line, a control line and an earth line, and controlled to provide a check code to said alarm unit and said transmitter unit, said receiver unit been stopped from providing said check code when a door of the motor vehicle is opened by force;
- said alarm unit and said transmitter unit have a respective self-provided battery power supply and are triggered to produce an audio alarm signal and a radio alarm message respectively when receive no check code from said receiver unit, said radio alarm message being receivable to car radios.
- View Dependent Claims (2, 3, 4, 5)
Specification