Electromagnetic vibration-detector device, in particular for ant

Details Electromagnetic vibration-detector device, in particular for ant Electromagnetic vibration-detector device, in particular for ant

1976-04-09

1977-06-07

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

340261, H02K 3506

Patent

active

040285677

ABSTRACT:
The invention concerns an electromagnetic vibration-detector device, in particular for anti-theft, comprising a core which is displaceable in the interior of a winding, said core being secured to the free end of a vibrating blade which is rigidly secured at its other end, the device being characterized in that a thickness of cellular material is stuck on at least one of the faces of the blade, and the thickness of cellular material comprises on its free face a sheet of flexible material.

REFERENCES:
patent: 2478712 (1949-08-01), Rockwell
patent: 2659857 (1953-11-01), Anderson

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