Patent ID: 6424244
Filing Date: 2002-07-23
Classification: H01H

Abstract:
A magnetic switch comprising a yoke which has the shape of a cup with an axis of symmetry and with a base and a wall, containing thereina core having a radial core flange at an end facing the base, this radial core flange defining with the wall a marginal air gap with a width of HR and a magnetic resistance of WR, a plate-shaped permanent magnet which is magnetised parallel to the axis of symmetry and is arranged between the core flange and the base and is magnetically coupled thereto, a coil whereof the coil axis corresponds to the axis of symmetry; which is covered by a plate-shaped armature which forms with the yoke a yoke air gap with a width of HJ and defines with the core a core air gap with a width of HK, which together form an operational air gap, which has a magnetic resistance of WA, having a member for lifting the armature axially away from the cup, in which, in the closed condition, the following applies: WAR.