Motor vehicle alarm system with acoustic signal emission via at least one radio loudspeaker installed into the motor vehicle
First Claim
1. An alarm system for a vehicle comprising:
- speaker means pivotably disposed inside said vehicle for emitting sound;
alarm means for sensing physical contact with said vehicle, said alarm means transmitting signals upon sensing said contact; and
control means for receiving said signals from said alarm means, said control means causing pivoting of said speaker means upon receipt of said signals and emitting of an alarm signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An alarm system having improved acoustic signal transmitting capability is provided for motor vehicles. The radio speaker system of the vehicle is employed for both passenger listening and for warning signal transmission in the event of unauthorized intrusion or attempted theft. The speakers occupy their usual installation positions in a vehicle, such as horizontally mounted in the dashboard, when used for the purpose of listening to a radio or tape. When the vehicle is unoccupied, and theft or tampering are attempted, an alarm system is activated which causes a control element to swivel the speaker into a position parallel to an external surface of the vehicle. Due to this repositioning of the speaker, reflection of an alarm signal back into the interior of the vehicle is minimized, and transmission of the alarm signal to the outside of the vehicle is optimized.
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Citations
13 Claims
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1. An alarm system for a vehicle comprising:
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speaker means pivotably disposed inside said vehicle for emitting sound; alarm means for sensing physical contact with said vehicle, said alarm means transmitting signals upon sensing said contact; and control means for receiving said signals from said alarm means, said control means causing pivoting of said speaker means upon receipt of said signals and emitting of an alarm signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for preventing theft of a motor vehicle comprising:
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pivotably disposing speaker means inside a vehicle providing said vehicle with alarm means for sensing physical contact with said vehicle and transmitting signals upon sensing said contact; and supplying said vehicle with control means for receiving said signals from said alarm means and causing pivoting of said speaker means upon receipt of said signals.
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Specification