Electro-magnetic device

Claim 1

AN ELECTRICITY OPERATED DEVICE COMPRISING A HOLLOW CASING MADE OF PARAMAGNETIC MATERIAL, AN ARMATURE SLIDABLY MOUNTED IN SAID CASING, AN ELECTRICAL COIL MEANS MOUNTED WITHIN SAID CASING AND SURROUNDING SAID ARMATURE, A PERMANENT MAGNET MOUNTED IN SAID CASING BUT SPACED AXIALLY FROM SAID COIL MEANS, A SPRING CONNECTED TO SAID ARMATURE AND CONSTANTLY URGING SAID ARMATURE AWAY FROM SAID PERMANENT MAGNET TO A FIRST POSITION SPACED THEREFROM, MEANS FOR SUPPLYING CURRENT TO SAID COIL MEANS TO CREATE A MAGNET FLUX IN ONE DIRECTION WHICH COOPERATES WITH THE MAGNETIC FORCE CONTINUOUSLY EXERTED BY SAID PERMANENT MAGNET TO MOVE SAID ARMATURE TO A SECOND POSITION AGAINST THE RESISTANCE OF SAID SPRING, SAID PERMANENT MAGNET HAVING SUFFICIENT FORCE TO RETAIN SAID ARMATURE IN SAID SECOND POSITION AFTER IT HAS BEEN MOVED THERETO ALTHOUGH SAID COIL MEANS BE SUBSEQUENTLY DISCONNECTED FROM SAID CURRENT SUPPLYING MEANS, SAID ARMATURE, WHEN IN SAID SECOND POSITION CLOSING A MAGNETIC CIRCUIT FROM ONE POLE OF SAID MAGNETIC THROUGH SAID ARMATURE AND SAID CASING BACK TO THE OTHER POLE OF SAID MAGNET, MEANS FOR SUPPLYING CURRENT TO SAID COIL MEANS TO CREATE THEREIN A MAGNETIC FLUX IN A DIRECTION TO OPPOSE THE HOLDING FORCE OF SAID PERMANENT MAGNETIC THEREBY TO ENABLE SAID SPRING TO MOVE SAID ARMATURE BACK TO SAID FIRST POSITION,AND MEANS CONNECTING SAID PERMANENT MAGNET, SAID COIL MEANS, AND SAID ARMATURE IN A CLOSED MAGNETIC CIRCUIT WHEN CURRENT IS SUPPLIED TO SAID COIL MEANS.