Patent ID: 6069560
Filing Date: 2000-05-30
Classification: G01H

Abstract:
A detector system for a security device adapted for detecting vibration of an object in any of three mutually perpendicular directions, said detector system comprising:a detector array including a plurality of detector devices, each detector device having a magnet supported for executing reciprocating movements in relation to a rest position, said magnets producing respective magnetic fields,a respective restraining means operationally associated with each magnet to support the respective magnet from the object, said restraining means holding said respective magnet in said rest position temporarily; andelectrical means operationally associated with said detector devices for emitting an electric signal in response to a change in the magnetic fields produced by movement of said magnets relative to said electrical means,said restraining means of the magnets of the detector devices providing free movement in space of the magnets collectively in three mutually perpendicular directions to enable the electrical means to produce said electrical signal in response to vibration of the object in any of the three mutually perpendicular directions.