Electric brake controller protector

Claim 1

IN A BRAKE CONTROLLER FOR ELECTRICALLY ACTUATED BRAKES WHICH CONTROLLER CAN BE SUBJECT TO AN EXCESSIVE CURRENT CONDITION, A RHEOSTAT COMPRISING: A DIELECTRIC CORE, A CONTROL WINDING HAVING A PLURALITY OF AXIALLY SPACED COILS SUPPORTED UPON SAID CORE, A TERMINAL LOCATED AT ONE END OF SAID CORE AND HAVING A STOP PORTION CONSTRUCTED OF A GOOD CONDUCTOR OF ELECTRICITY AND SUPPORTED BY SAID CORE, A FLEXIBLE CONDUCTOR EXTENDING FROM A FIRST END PROXIMATE THE FIRST OF SAID COILS AT THE OPPOSITE END OF SAID CORE TO A SECOND END AT SAID STOP PORTION, ACTUATING MEANS FOR MOVING SAID FLEXIBLE CONDUCTOR INTO ENGAGEMENT WITH CONSECUTIVE ONES OF SAID COILS STARTING AT SAID FIRST END AND FINALLY ENDING WITH SAID STOP PORTION, SAID CONTROL WINDING HAVING AN END PORTION OF A PRESELECTED INSULATED LENGTH SUPPORTED UPON SAID TERMINAL FOR ADDING A PRESELECTED AMOUNT OF RESISTANCE OF SAID CONTROL WINDING SUFFICIENT TO PREVENT BURN OUT OF THE COILS ADJACENT SAID STOP PORTION UNDER THE EXCESSIVE CURRENT CONDITION, SAID CORE HAVING A REDUCED SECTION PORTION AT SAID ONE END PROXIMATE TO SAID STOP PORTION WITH THE END COILS AT SAID ONE END LOCATED THEREIN AND WITH SAID END COILS BEING INSULATED FROM ELECTRICAL CONTACT BY SAID CONDUCTOR, ADJACENT ONES OF AT LEAST SOME OF SAID COILS AT SAID STOP PORTION BEING SPACED A PRESELECTED DISTANCE FROM EACH OTHER WITH SAID ADJACENT ONES ENGAGING EACH OTHER AS A RESULT OF THERMAL EXPANSION FROM THE EXCESSIVE CURRENT CONDITION, SAID CONDUCTOR HAVING A TAB PORTION MOVABLY SUPPORTED IN A SLOT ON SAID ACTUATING MEANS AND HAVING A CONTOUR PORTION BEING CURVED INWARDLY TRANSVERSELY OF ITS LENGTH SUCH THAT WITH SAID CONDUCTOR ENGAGING ALL BUT THE LAST OF SAID COILS AND UNDER THE EXCESSIVE CURRENT CONDITION, THERMAL EXPANSION OF SAID CONDUCTOR WILL BEND SAID CONDUCTOR INTO ENGAGEMENT WITH SAID STOP PORTION AND NOT IN CONTACT WITH THE LAST OF SAID COILS ADJACENT SAID STOP PORTION, AND MEANS FOR ELECTRICALLY CONNECTING SAID TERMINAL, SAID WINDING, AND SAID FLEXIBLE CONDUCTOR TO AN EXTERNAL CIRCUIT.