Two-part magnetic catch for doors or the like

Claim 1

A MAGNETIC CATCH FOR A DOOR WHICH IA ADAPTED FOR MOVEMENT INTO AND OUT OF A DOOR FRAME FOR CLOSING THE DOORWAY DEFINED THEREIN, SAID CATCH COMPRISING A FIRST MAGNET RETAINING MEMBER, MEANS FOR MOUNTING SAID FIRST MEMBER ON THE DOOR, A FIRST PLURALITY OF PERMANENT MAGNETS CARRIED BY SAID FIRST MEMBER AND HAVING A SERIES OF EXPOSED POLE FACES CIRCUMAXIALLY ARRANGED AROUND SAID FIRST MEMBER, EACH SUCH POLE FACE HAVING A POLARITY OPPOSITE THAT OF THE TWO POLE FACES ADJACENT THERETO IN SAID FIRST MEMBER, A SECOND MAGNET RETAINING MEMBER GENERALLY SIMILAR TO SAID FIRST MEMBER, MEANS FOR MOUNTING SAID SECOND MEMBER IN SAID DOOR FRAME SO THAT THE RESPECTIVE AXES OF SAID ANNULAR MEMBERS ARE IN REGISTERED RELATION WHEN SAID DOOR IS CLOSED IN SAID DOORWAY, A SECOND PLURALTIY OF PERMANENT MAGNETS CARRIES BY SAID SECOND MEMBER AND HAVING A SERIES OF EXPOSED POLE FACES CIRCUMAXIALLY ARRANGED AROUND SAID SECOND MEMBER, EACH OF SAID LAST-MENTIONED POLE FACES HAVING A POLARITY OPPOSITE THAT OF THE TWO POLE FACES ADJACENT THERETO IN SAID SECOND MEMBER, AND SAID MEANS FOR MOUNTING AT LEAST ONE OF SAID MAGNET RETAINING MEMBERS INCLUDING SUITABLE ADJUSTMENT MEANS FOR PREPOSITIONING THAT MEMBER IN ANY DESIRED ANGULAR RELATION WITH RESPECT TO THE OTHER OF SAID MEMBERS WHEREBY THE MAGNETIC CLOSING FORCE EXERTED ON SAID CLOSED DOOR CAN BE PRESET TO ANY DESIRED VALUE.