Magnetic lock-up relay

Claim 1

A MAGNETIC LOCK-UP RELAY COMPRISING A MAGNETIC CORE STRUCTURE INCLUDING A MAIN CORE AND AN AUXILIARY CORE; A FERROMAGNETIC PIVOT MEMBER INCLUDING A PERMANENT MAGNET MAGNETICALLY CONNECTED AT ONE END TO ONE END OF BOTH SAID MAIN CORE AND SAID AUXILIARY CORE AND HAVING AT THE OTHER END AN EDGE DEFINING A PIVOT AXIS; AN ARMATURE HAVING A PAIR OF TABS AT ONE SIDE BENT AT ALMOST A RIGHT ANGLE TO THE REMAINDER OF SAID ARMATURE AND HOOKED OVER SAID EDGE TO PERMIT SAID ARMATURE TO PIVOT ABOUT SAID EDGE, SAID TABS PROVIDING A LOW-RELUCTANCE COUPLING BETWEEN SAID ARMATURE AND SAID PERMANENT MAGNET WHEN SAID ARMATURE IS ROTATED AWAY FROM SAID MAIN CORE; AN LSHAPED SPRING MEMBER ATTACHED TO SAID FERROMAGNETIC PIVOT MEMBER AND EXTENDING OVER SAID EDGE AND OVER SAID ARMATURE TO HOLD SAID ARMATURE AND TO PERMIT IT TO PIVOT AND TO MOVE AWAY FROM SAID EDGE TO A LIMITED EXTENT; A FIRST COIL ON SAID CORE STRUCTURE TO PRODUCE MAGNETIC FLUX IN SAID MAIN CORE AIDING THE FLUX OF SAID PERMANENT MAGNET TO CAUSE SAID ARMATURE TO PIVOT AGAINST SAID MAIN CORE WHEN SAID COIL IS ENERGIZED BY DIRECT CURRENT OF A PREDETERMINED POLARITY; THE MAGNETOMOTIVE FORCE OF SAID PERMANENT MAGNET BEING SUFFICIENT TO HOLD SAID ARMATURE AGAINST SAID MAIN CORE AFTER THE DIRECT CURRENT IN SAID COIL HAS CEASED; A SECOND COIL ON SAID CORE STRUCTURE TO PRODUCE MAGNETIC FLUX IN SAID AUXILIARY CORE AIDING THE FLUX OF SAID PERMANENT MAGNET TO CAUSE SAID ARMATURE TO PIVOT AWAY FROM SAID MAIN CORE WHEN SAID SECOND COIL IS ENERGIZED BY DIRECT CURRENT OF A PREDETERMINED POLARITY; AND A FERROMAGNETIC EXTENSION ON THE OUTER END OF SAID AUXILIARY CORE EXTENDING OVER THE OUTER END OF SAID MAIN CORE AND OVER THE FREE END OF SAID ARMATURE TO MAKE CONTACT WITH SAID ARMATURE ALONG A LINE PARALLEL TO SAID PIVOT EDGE TO PREVENT SAID ARMATURE FROM TILTING AWAY FROM SAID PIVOT EDGE WHEN SAID ARMATURE IS PIVOTED AWAY FROM SAID MAIN CORE, SAID PERMANENT MAGNET PROVIDING MAGNETOMOTIVE FORCE TO HOLD SAID ARMATURE AGAINST SAID EXTENSION AFTER THE DIRECT CURRENT IN SAID SECOND COIL HAS CEASED.