Magnetic door catch

Claim 1

IN A MAGNETIC CATCH FOR HOLDING THE SWINGING DOOR OF A CABINET CLOSED, A PERMANENT MAGNET SANDWICHED BETWEEN POLE PIECES AND EACH FORMED FROM PLATE STOCK TO A RECTANGULAR PLAN CONFIGURATION, A HOUSING OF NONMAGNETIC MATERIAL FORMED TO PROVIDE AN OPEN-FRONT STALL IN WHICH SAID SANDWICH IS RECEIVED WITH PORTIONS OF THE POLE PIECES PROJECTING THROUGH SAID FRONT OPENING AND HAVING MEANS FOR RETAINING THE SANDWICH IN LOOSE RELATIONSHIP WITH THE HOUSING, MEANS FOR NON-ADJUSTABLY MOUNTING THE HOUSING WITH ITS RETAINED SANDWICH UPON A WALL OF THE CABINET TO HAVE THE FRONT EDGES OF SAID PROJECTING PORTIONS OF THE POLE PIECES FACE OUTWARDLY PROXIMAL TO AND GENERALLY PARALLEL WITH THE INNER SURFACE OF THE CLOSED DOOR, AND AN ARMATURE PLATE FOR THE MAGNET CARRIED BY THE DOOR IN A POSITION TO STRIKE SAID FRONT EDGES OF THE POLE PIECES WHEN THE DOOR IS SWUNG INTO SAID CLOSED POSITION, THE ARMATURE PLATE BEING FORMED AS THE FLAT HEAD OF A SCREW HAVING A COMPARATIVELY LONG THREADED SHANK OF A UNIFORM DIAMETER THROUGHOUT VERY NEARLY ITS ENTIRE LENGTH AND; COMPOSED OF A MATERIAL ATTRACTED TO THE MAGNET AND SO THREADABLY MOUNTED UPON SAID DOOR THAT THE ACT OF TURNING THE SCREW IN ONE DIRECTION ADVANCES THE HEAD TOWARD AND IN THE OTHER DIRECTION RETRACTS THE HEAD FROM SAID INNER SURFACE OF THE DOOR, THUS TO POSITION THE HEAD IN A SELECTED POSITION ADJUSTED TOWARD OR FROM SAID INNER SURFACE.