Lifting magnet for unlocking e.g. airplane chassis door, has switch contact closed by external force effect on actuator that is carried with armature piston when armature is moved in end position

摘要

The magnet has an armature piston (17) transferred from an end position into another end position using a coil (15) . A switch contact (23) is closed by an external force effect on an actuator (21) that is carried with the armature piston when an armature is moved in the former end position. The actuator is movable opposite to the armature piston in the direction of the switching contact. The armature piston is formed as a de-energized coil in the former end position. The switch contact is separated from the actuator by a flexible seal membrane (27).