Vehicle alarm
First Claim
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1. A vehicle warning alarm circuit producing an audible signal from a buzzer in response to an electrical signal indicating the occurrence of a selected condition, comprising:
- a. means for generating a selected audio signal when enabled and energized;
b. means for generating a low frequency signal, said low frequency signal enabling said audio signal generating means to produce an interrupted audio signal;
c. means for energizing both of said generating means;
d. means for applying said interrupted audio signal to said buzzer to produce said audible signal; and
e. means for deenergizing both of said generating means after a selected period of operation.
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Abstract
An alarm device for use in a vehicle which utilizes an audio frequency oscillator to drive a buzzer or tone device audible to the occupants of the vehicle. The alarm includes a control circuit which automatically stops the alarm after a preselected interval and may include modulated or interrupted alarm.
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Citations
10 Claims
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1. A vehicle warning alarm circuit producing an audible signal from a buzzer in response to an electrical signal indicating the occurrence of a selected condition, comprising:
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a. means for generating a selected audio signal when enabled and energized; b. means for generating a low frequency signal, said low frequency signal enabling said audio signal generating means to produce an interrupted audio signal; c. means for energizing both of said generating means; d. means for applying said interrupted audio signal to said buzzer to produce said audible signal; and e. means for deenergizing both of said generating means after a selected period of operation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle warning alarm circuit producing an audible signal from a buzzer in response to an electrical signal indicating the occurrence of a selected condition, comprising:
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a. means fo generating a selected audio signal when enabled and energized; b. means for generating a low frequency signal said low frequency signal enabling said audio signal generating means to produce an interrupted audio signal; c. means for energizing both of said generating means; d. means for applying said interrupted audio signal to said buzzer to produce said audible signal; and e. means for disabling said low frequency generating means to thereby disable said audio signal generating means after a selected period of operation. - View Dependent Claims (8, 9, 10)
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Specification