Ignition apparatus

Claim 1

TORCH IGNITION APPARATUS COMPRISING AN ELONGATED METAL CASING HAVING A CENTRAL PASSAGE LONGITUDINALLY THERETHROUGH, SAID CASING HAVING AN INNER END ADAPTED TO PROJECT INTO A COMBUSTION CHAMBER AND AN OPPOSITE, OUTER END ADAPTED TO BE POSITIONED OUTWARDLY OF THE COMBUSTION CHAMBER, SAID CASING HAVING AN ANNULAR SHOULDER PROJECTING INWARDLY FROM THE WALL OF THE PASSAGE INTERMEDIATE THE LENGTH OF THE CASING, AN ELONGATED METAL MEMBER CENTRALLY DISPOSED WITHIN THE CASING, A FIRST SLEEVE OF ELECTRICALLY INSULATING MATERIAL SURROUNDING THE ELONGATED MEMBER AT THE SHOULDER AND EXTENDING ON BOTH SIDES THEREOF LONGITUDINALLY OF THE CASING, SAID FIRST SLEEVE SNUGLY ENGAGING THE CASING AND THE ELONGATED MEMBER AND HAVING AN OUTWARDLY EXTENDING FLANGE OVERLYING AND ENGAGING THE SHOULDER ON THE CASING, THE ELONGATED MEMBER AT ITS OUTER END HAVING A CYLINDRICAL PORTION OF REDUCED DIAMETER OVERLAPPING THE FLANGE ON THE FIRST SLEEVE, A SECOND ELECTRICALLY INSULATING SLEEVE SNUGLY ENGAGING THE OUTER REDUCED DIAMETER PORTION OF THE ELONGATED MEMBER AND HAVING ITS INNER END TLESCOPED WITHIN THE OUTER END OF THE FIRST SLEEVE, A LONGITUDINALLY EXTENDING CENTRAL BORE IN THE ELONGATED MEMBER EXTENDING THROUGHOUT A SUBSTANTIAL PORTION OF THE LENGTH THEREOF FROM THE INNER TOWARD THE OUTER END OF THE ELONGATED MEMBER, A NOZZLE ON THE INNER END OF THE ELONGATED MEMBER COMMUNICATING WITH SAID BORE, MEANS TO SUPPLY THE NOZZLE WITH FUEL COMPRISING A TRANSVERSE PASSAGE THROUGH THE WALL OF THE CASING, THE SECOND SLEEVE, AND THE WALL OF THE ELONGATED MEMBER INTO THE BORE THEREIN, AND AN ANNULAR SPARK GAP COMPRISING A FIRST, INNER ANNULAR ELECTRODE ON THE INNER END OF THE ELONGATED MEMBER AND A SECOND, OUTER ANNULAR ELECTRODE ON THE INNER END OF THE CASING.