Connector with a safety shut-off feature

Abstract

A .[.connector.]. .Iadd.device .Iaddend.with a safety shut-off feature for .[.connecting a gas appliance to a source of gas.]. .Iadd.preventing the flow of a gas in the event of an occurrence which might cause gas leakage or a fire hazard.Iaddend.. The .[.connector.]. .Iadd.device .Iaddend.comprises a tubular line .[., a first coupling adjacent the inlet end of the line for releasably coupling the line.]. .Iadd.adapted for connection .Iaddend.to .[.the.]. .Iadd.a .Iaddend.source of gas, .[.a second coupling adjacent the outlet end of the line for releasably coupling the line to the appliance,.]. and a valve associated with the line movable between an open position for permitting passage of gas through the line and a closed position for preventing passage of gas through the line. An electric circuit controls the operation of the valve. The circuit comprises an electrical conductor on the line designed to break or otherwise .[.become non-conductive.]. .Iadd.undergo a change in electrical resistance .Iaddend.in response to excessive heating or damage to the line, thereby causing .[.an interruption.]. .Iadd.a change .Iaddend.in the flow of electric current through the electric circuit. The valve is responsive to such .[.interruption.]. .Iadd.change .Iaddend.to move to its closed position to prevent further passage of gas through the line.

What is claimed is: 
     
       1. A connector with a safety shut-off feature for connecting a gas appliance to a source of gas, said connector comprising a tubular line with inlet and outlet ends, first coupling means adjacent the inlet end of the line for releasably coupling the line to the source of gas, second coupling means adjacent the outlet end of the line for releaseably coupling the line to the appliance, valve means associated with the line moveable between an open position for permitting passage of gas through the line and a closed position for preventing passage of gas through the line, and electric circuit means for controlling the operation of said valve means, said electric circuit means comprising indicator means on the line for conducting electricity and adapted to break or otherwise undergo a change in electrical resistance in response to excessive heating or damage to the line, thereby causing a change in the flow of electric current through said electric circuit means, said valve means being responsive to such change to move to its said closed position to prevent further passage of gas through the line. 
     
     
       2. A connector as set forth in claim 1 wherein said indicator means comprises a small diameter, temperature sensitive wire secured to the line and extending a substantial portion of the length of the line. 
     
     
       3. A connector as set forth in claim 2 wherein said wire is adapted to become non-conductive in the event the line is exposed to temperatures in excess of a predetermined temperature. 
     
     
       4. A connector as set forth in claim 3 wherein the predetermined temperature is about 180°-250° F. 
     
     
       5. A connector as set forth in claim 2 wherein said wire is spiral wound on the line. 
     
     
       6. A connector as set forth in claim 5 wherein said wire is secured to the line by a strip of material wrapped around the line, said connector further comprising an outer protective sheath covering said line, said strip wrapped around the line, and said wire. 
     
     
       7. A connector as set forth in claim 6 wherein said line is adhesively secured to said strip, and wherein said strip is spiral wrapped on the line. 
     
     
       8. A connector as set forth in claim 1 wherein said valve means is dropped immediately downstream from said first coupling means. 
     
     
       9. A connector is set forth in claim 8 wherien said valve means comprises an electrically operated solenoid valve which, when energized, is adapted to move to its open position and, when deenergized, is adapted to move to its closed position. 
     
     
       10. A connector as set forth in claim 9 wherein said first coupling means comprises first and second quick-connect coupling components, the first component being attached to the line and the second component to the source of gas, said electrical circuit means defining an electrical circuit through said first and second coupling components when the components are connected, said electrical circuit including said solenoid valve, said electrical conductor means, a power source and switch means, the arrangement being such that in the event said electrical conductor means becomes non-conductive , said switch means is adapted to deenergizing said solenoid. 
     
     
       11. A connector is set forth in claim 1 wherein said first coupling means comprises first and second quick-connect coupling components, the first component being attached to the line and the second component to the source of gas, said electrical circuit means defining an elecyrical circuit through said first and second coupling components when the components are connected, said electrical circuit including said solenoid valve, said indicator means, a power source and switch means, the arrangement being such that in the event said indicator means becomes non-conductive, said switch means is adapted to deenergize said solenoid. 
     
     
       12. A connector as set forth in claim 11 wherein said valve means is disposed upstream from said second coupling component. 
     
     
       13. A connector as set forth in claim 1 wherein said line is a flexible hose, and wherein said indicator means comprises a small diameter, temperature sensitive wire extending along the hose. 
     
     
       14. A connector as set forth in claim 13 wherein said wire is adapted to become non-conductive in the event the line is exposed to temperature in excess of about 180°-250° F. 
     
     
       15. A connector as set forth in claim 13 wherein said wire is spiral wound around said hose substantially the entire length of the hose. .Iadd. 
     
     
       16.  A device with a safety shut-off feature for preventing the flow of a gas in the event of an occurrence which might cause gas leakage or a fire hazard, said device comprising a tubular line adapted for connection to a source of gas, valve means associated with the line movable between an open position for permitting passage of gas through the line and a closed position for preventing passage of gas through the line, and electric circuit means for controlling the operation of said valve means, said electric circuit means comprising indicator means on the line for conducting electricity and adapted to break or otherwise undergo a change in electrical resistance in response to excessive heating or damage to the line, thereby causing a change in the flow of electric current through said electric circuit means, said valve means being responsive to such change to move to its said closed position to prevent further passage of gas through the line. .Iaddend. .Iadd. 
     
     
       17.  A device as set forth in claim 16 wherein said indicator means comprises a small diamter, temperature sensitive wire secured to the line and extending a substantial portion of the length of the line. .Iaddend. .Iadd.18. A device as set forth in claim 17 wherein said wire is adapted to become non-conductive in the event the line is exposed to temperatures in excess of about 180°-250° F. .Iaddend. .Iadd.19. A device as set forth in claim 17 wherein said wire is spiral wound on the line. 
     
     
        .Iaddend. .Iadd.20.  A device as set forth in claim 19 wherein said wire is secured to the line by a strip of material wrapped around the line, said connector further comprising an outer protective sheath covering said line, said strip wrapped around the line, and said wire. .Iaddend. .Iadd.21. A device as set forth in claim 20 wherein said line is adhesively secured to said strip, and wherein said strip is spiral wrapped on the line. .Iaddend. .Iadd.22. A device as set forth in claim 16 wherein said line is a flexible hose, and wherein said indicator means comprises a small diameter, temperature sensitive wire extending along the hose. .Iaddend. .Iadd.23. A device as set forth in claim 22 wherein said wire is adapted to become non-conductive in the event the line is exposed to temperatures in excess of about 180°-250° F. .Iaddend. .Iadd.24. A device as set forth in claim 22 wherein said wire is spiral wound around said hose substantially the entire length of the hose. .Iaddend.