Vehicle security system

Details Vehicle security system Vehicle security system

1995-11-08

1998-07-21

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340428, 310 81, 73 113, B60R 2510

Patent

active

057839883

ABSTRACT:
In a vehicle alarm system, as one feature circuitry is provided which can be attached to detect an input from a door pin input switch, and which can detect the opening and closing of the door if the door pin input switch is either a positively triggered pin switch or a negatively triggered pin switch. Furthermore, a specific structure of a piezoelectric disk sensor and detecting circuitry associated therewith is provided. The piezoelectric disk sensor has a weight mounted off a central axis at a distance of approximately a radius of the piezoelectric disk from a rigid mounting area. The associated circuitry evaluates all information from a shock sensing signal detected by the piezoelectric disk sensor.

REFERENCES:
patent: 3794967 (1974-02-01), Fischer
patent: 3815088 (1974-06-01), Kumpfbeck
patent: 5325718 (1994-07-01), Ono

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