Electromagnetic latching device

Claim 1

AN ELECTROMAGNET CONTROL ASSEMBLY COMPRISED OF A FERROMAGNETIC CORE; FIRST AND SECOND COILS INDUCTIVELY ASSOCIATED WITH SAID CORE; SAID FIRST COIL BEING COMPRISED OF A FIRST PLURALITY OF WINDINGS SURROUNDING A FIRST REGION OF SAID CORE AND A SECOND PLURALITY OF WINDINGS SURROUNDING A SECOND REGION OF SAID CORE; SAID FIRST AND SECOND WINDINGS BEING SPACED A PREDETERMINED DISTANCE FROM ONE ANOTHER; SAID SECOND COIL HAVING A THIRD PLURALITY OF WINDINGS WOUND ABOUT SAID FIRST REGION AND A FOURTH PLURALITY OF WINDINGS WOUND ABOUT SAID SECOND CORE REGION, SAID PLURALITY OF FIRST AND SECOND WINDINGS BEING CONNECTED IN SERIES; SAID PLURALITY OF THIRD AND FOURTH WINDINGS BEING CONNECTED IN SERIES; AN ARMATURE MEMBER BEING PIVOTALLY MOUNTED AT ONE END THEREOF AND HAVING THE OPPOSITE END THEREOF POSITIONED ADJACENT THE REGION OF SAID CORE INTERMEDIATE SAID FIRST AND SECOND REGIONS; BIASING MEANS COUPLED TO THE FREE END OF SAID ARMATURE FOR URGING SAID ARMATURE GENERALLY AWAY FROM SAID CORE; SAID FIRST AND SECOND COILS BEING ADAPTED TO RECEIVE CURRENT SIGNALS FOR GENERATING A MAGNETIC FLUX PATTERN NORMAL TO THE LONGITUDINAL AXIS OF SAID CORE FOR ATTRACTING SAID ARMATURE MEMBER; SAID CORE MEMBER BEING OF A FERROMAGNETIC MATERIAL HAVING A RETENTITIVY CHARACTERISTIC TO MAINTAIN THE ATTRACTIVE FORCE UPON SAID ARMATURE EVEN AFTER THE CURRENT SIGNALS HAVE BEEN REMOVED.