Magnetic catch

Claim 1

IN A MAGNETIC CATCH MOUNTABLE ON ONE OF A PAIR OF DOOR AND FRAME MEMBERS FOR COACTION WITH A STRIKE MOUNTED ON THE OTHER OF SAID MEMBERS, THE COMBINATION OF, A HOLLOW CASE HAVING TWO SPACED SIDE WALLS AND ONE END WALL WITH THE OPPOSITE END BEING OPEN, A MAGNET ASSEMBLY OF PREDETERMINED LENGTH MOVABLY MOUNTED IN SAID CASE AND INCLUDING POLE PIECES PROJECTING OUTWARDLY THROUGH SAID OPEN END AND TERMINATING IN SPACED POLE FACES FOR CONTACTING THE STRIKE, MEANS COACTING BETWEEN SAID CASE AND SAID ASSEMBLY TO RETAIN THE LATTER IN THE CASE AND PERMIT LIMITED BACK AND FORTH MOVEMENT OF THE ASSEMBLY TOWARD AND AWAY FROM SAID END WALL, THE OUTER EDGE OF ONE OF SAID SIDE WALLS CONSTITUTING A BUMPER AT SAID OPEN END AND BEING SPACED FROM SAID END WALL A DISTANCE GREATER THAN SAID PREDETERMINED LENGTH TO ABUT AGAINST THE STRIKE BEFORE SAID ASSEMBLY ABUTS AGAINST THE END WALL WHEREBY EXCESSIVE SHOCKS OCCASIONED BY SLAMMING OF THE DOOR ARE ABSORBED BY SAID ONE SIDE WALL AND LATERAL FLEXING OF SAID CASE RATHER THAN SAID END WALL, AND A SPRING ACTING BETWEEN SAID CASE AND SAID ASSEMBLY TO URGE THE LATTER YIELDABLY AWAY FROM SAID END WALL, SAID SPRING NORMALLY HOLDING SAID POLE FACES BEYOND SAID BUMPER FOR CONTACT WITH THE STRIKE.