Automobile alarm device

Details Automobile alarm device Automobile alarm device

1977-08-23

1979-05-15

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

340539, 340566, 200 6152, B60R 2510

Patent

active

041550676

ABSTRACT:
An alarm device for detecting movement of parked automobiles provides a support for mounting on an automobile. An outer member defines a ring having an inner surface of conducting material. A helical spring is attached to the support to suspend the ring in an attitude where the ring defines an aperture in cross-section. An inner member having an outer surface of conducting material is connected by a flexible connection to the support to be suspended in said outer member and spaced from the inner surface thereof.

REFERENCES:
patent: 2075040 (1937-03-01), Kieber
patent: 3562706 (1971-02-01), Mason

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