Contactor

Claim 1

IN AN ELECTROMAGNETICALLY OPERABLE DEVICE, IN COMBINATION, A BASE HOLLOWED-OUT TO PROVIDE A WELL, A COVER FOR SAID WELL, AN ELONGATED UPWARDLY DIRECTED CONVEX RIDGE IN THE BOTTOM OF THE WELL, A MAGNETIC CIRCUIT COMPRISING A CORE, DISPOSED IN THE WELL OF THE BASE TO REST ON SAID RIDGE TO MAKE LINE CONTACT WITH SAID RIDGE, AND A MOVABLE ARMATURE DISPOSED TO COACT WITH SAID CORE, SAID CORE HAVING UPWARDLY DIRECTED PROJECTING MEANS HAVING ARMATURE ENGAGING SURFACES, COIL MEANS OPERATIVELY DISPOSED WITH RESPECT TO SAID MAGNETIC CIRCUIT, MEANS COACTING WITH SAID COVER FOR HOLDING THE COIL MEANS SUBSTANTIALLY IN FIXED RELATION TO SAID BASE, SAID ARMATURE BEING MOUNTED FOR PIVOTAL MOVEMENT ABOUT AN AXIS ABOVE SAID RIDGE TRANSVERSE OF THE RIDGE AND FOR TRANSLATIONAL MOVEMENT TOWARD SAID PROJECTIONS UPON ENERGIZATION OF SAID COIL MEANS, SAID CORE BEING PROVIDED WITH A TRANSVERSE SLOT NEAR ITS BOTTOM SURFACE, CORE RETAINING MEANS COMPRISING A BAR, HAVING A DOWNWARDLY DIRECTED BOWED PORTION NEAR ITS MIDDLE, DISPOSED IN SAID SLOT SO THAT THE BOWED PORTION ENGAGES THE BOTTOM OF THE SLOT AND THE ENDS PROJECT BEYOND THE CORE AT EACH SIDE OF THE CORE, A SPRING DISPOSED BETWEEN THE COIL MEANS AND ONE END OF THE BAR, A SECOND SPRING DISPOSED BETWEEN THE COIL MEANS AND THE OTHER END OF THE BAR WHEREBY THE CORE BOTTOM IS BIASED AGAINST THE ARCUATE RIDGE AND THUS HAS SOME FREEDOM OF PIVOTAL ADJUSTING MOVEMENT ON THE RIDGE AND IS RETAINED IN THE WELL OF THE BASE.