| 摘要 |
An electrical alarm system is provided for automobiles for warning about defective conditions or malfunctions. The system includes electrical circuits, including switches responsive to certain conditions in the automobile, such as when the parking brake is down, the seat belt is off, the tire pressure is low, the water level in the radiator is low, etc., when the vehicle is moving and electricity flows through the circuit. A diode in each circuit isolates that circuit from the other circuit and an alarm in each circuit is activated by the switch to give audible signal of the undesired condition.
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