Electromagnet for winding automobile clocks

Claim 1

AN ELECTROMAGNETIC DEVICE COMPRISING A COIL, A MAGNETIZABLE CORE SURROUNDED BY SAID COIL, END PLATES FOR SAID COIL, MOUNTING PLATE SUPPORTED BY SAID END PLATES AND HAVING AT LEAST ONE END PROTRUDING BEYOND A CORRESPONDING END PLATE, SAID PROTRUSION BEING PROVIDED WITH A NOTCH, AN ARMATURE MOUNTED IN SAID NOTCH, SAID ARMATURE HAVING A FIRST PORTION AND A SECOND PORTION, SAID FIRST PORTION BEING ON ONE SIDE OF SAID MOUNTING PLATE AND OVERLYING ONE END OF SAID CORE, SAID SECOND PORTION OF SAID ARMATURE BEING ON THE OTHER SIDE OF SAID MOUNTING PLATE AND HAVING A PAIR OF LUGS, AND AN ARMATURE RETURN SPRING HAVING A BASE WITH A PAIR OF ARMS FORMED INTEGRAL THEREWITH, SAID BASE BEING SECURED TO SAID MOUNTING PLATE, EACH OF SAID ARMS HAVING A FIRST PORTION CURVING AWAY FROM SAID MOUNTING PLATE AND A SECOND PORTION RECURVING TOWARD SAID MOUNTING PLATE, SAID SECOND PORTION TERMINATING IN A SUBSTANTIALLY CLOSED LOOP HAVING A RADIUS OF CURVATURE SMALLER THAN SAID FIRST AND SECOND PORTIONS AND RECEIVED OVER ONE OF SAID LUGS, WHEREBY SAID LOOPS AND LUGS SECURE SAID SPRING TO SAID ARMATURE.