Patent ID: 7843293
Filing Date: 2010-11-30
Classification: H01H

Abstract:
1. A magnetic drive for a switch, in particular for an electric switch ( 1 ) having an armature ( 26 ) which is linearly displaceable between two end positions of a space ( 21 ), with at least one moveable switch contact, having a shunt body ( 27 ) made of a magnetizable material and arranged at a distance from the armature ( 26 ) essentially on the axis of displacement of the armature ( 26 ), and having means ( 24 , 25 , 29 , 31 ) for generating a magnetic field which exerts a retaining force on the armature ( 26 ) holding it in the end positions ( 28 , 29 ), where the course of the flux lines of the magnetic field is altered by bringing the shunt body ( 27 ) together with the armature ( 26 ) so that the retaining force acting on the armature ( 26 ) is reduced, wherein a lock means for the shunt body ( 27 ), by which the shunt body ( 27 ) can be held in the end position ( 28 ) facing the former and can be released from the end position ( 28 ) by exerting a low force or power.