Spring actuated safety switch for the fuel supply linkage of an internal combustion engine

Claim 1

THE COMBINATION WITH AN INTERNAL COMBUSTION ENGINE, OF A FUEL INTAKE CONTROL VALVE CONTROLLING THE SUPPLY OF FUEL TO SAID ENGINE, SAID VALVE HAVING AN IDLING POSITIION IN WHICH A MINIMUM AMOUNT OF FUEL IS SUPPLIED TO THE ENGINE; VALVE CONTROL MEANS REMOTE FROM SAID INTAKE CONTROL VALVE; LINKAGE CONNECTING SAID VALVE CONTROL MEANS WITH SAID VALVE; A RETURN SPRING ADAPTED FOR CONNECTION WITH SAID LINKAGE AND CAPABLE OF EXERTING A SUBSTANTIAL FORCE YIELDINGLY URGING SAID FUEL INTAKE CONTROL VALVE TOWARD ITS IDLING POSITION, SAID RETURN SPRING BEING YIELDABLE TO VALVE OPENING FORCE EXERTED THROUGH SAID VALVE CONTROL MEANS; IGNITION MEANS INCLUDING A CONDUCTOR CONTROLLING THE SUPPLY OF CURRENT FOR IGNITION PURPOSES TO SAID ENGINE; A SAFETY SWITCH ADAPTED TO BE CONNECTED IN LINE WITH SAID RETURN SPRING AND CONTROLLING THE FLOW OF CURRENT THROUGH SAID IGNITION CONDUCTOR, SAID SAFETY SWITCH COMPRISING A HOUSING; TWO SPACED APART TERMINALS CARRIED BY SAID HOUSING AND CONTROLLING THE FLOW OF CURRENT IN SAID CONDUCATOR; A CONTACT MEMBER IN SAID HOUSING MOVABLE BETWEEN A CLOSED CIRCUIT POSITION AND AN OPEN CIRCUIT POSITION RELATIVE TO SAID TWO TERMINALS; A SPRING OF LESS STRENGTH THAN SAID RETURN SPRING DISPOSED IN SAID HOUSING URGING SAID CONTACT MEMBER INTO AN OPEN CIRCUIT POSITION; AND A PULL ROD CONNECTED WITH SAID CONTACT MEMBER AND EXTENDING TO THE EXTERIOR OF SAID HOUSING, SAID PULL ROD AND HOUSING BEING ADAPTED TO BE CONNECTED IN LINE BETWEEN SAID RETURN SPRING AND SAID LINKAGE AND SAID RETURN SPRING BEING CAPABLE OF EXERTING A SUBSTANTIALLY GREATER FORCE IN URGING SAID CONTACT MEMBER INTO A CLOSED CIRCUIT POSITION THAN IS EXERTED BY THE SPRING WITHIN SAID HOUSING IN URGING SAID CONTACT MEMBER INTO AN OPEN CIRCUIT POSITION.