Speaker system for motor vehicles with an alarm device

Details Speaker system for motor vehicles with an alarm device Speaker system for motor vehicles with an alarm device

1988-03-31

1989-06-06

Ng, Jin F.

Electrical audio signal processing systems and devices

Vehicle

340426, 340568, H04B 100, G08B 1314

Patent

active

048378356

ABSTRACT:
A speaker system for a motor vehicle includes a detection device which detects a change in the state of fixing of the speaker system on a part of the vehicle body by means of a fixing device. When the change in the fixing state is detected, an alarm is generated by an alarm device connected to the detection device, so that loosening of the fixing device such as a holding screw is surely prevented.

REFERENCES:
patent: 4137521 (1979-01-01), Martinez
patent: 4253084 (1981-02-01), Topputo
patent: 4531116 (1985-07-01), Takagi et al.
patent: 4620182 (1986-10-01), Keifer
patent: 4679026 (1987-07-01), Knakowski et al.
patent: 4706070 (1987-11-01), Forti et al.

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