Pilot flash tube ignition system

Claim 1

IN A GAS RANGE HAVING A MAIN BURNER; A MAIN PILOT BURNER AND ASSOCIATED FLASH TUBE; AND AN INTERMEDIATE PILOT-AND-KEEP-WARM BURNER IN THE FORM OF A TUBE HAVING ONE END COMMUNICATING WITH A SOURCE OF FUEL GAS UNDER PRESSURE, ANOTHER END WITH AN UPWARDLY DIRECTED BURNER PORT IN IGNITING RELATION TO SAID MAIN BURNER, AND MEANS PROVIDING A PRIMARY AIR INLET BETWEEN SAID ENDS; IMPROVED STRUCTURE WHEREIN SAID FLASH TUBE HAS AN UPPER WALL PORTION AND LOWER WALL PORTIONS, SAID UPPER WALL PORTION HAVING AN END PORTION WHICH IS SPACED VERTICALLY ABOVE SAID BURNER PORT, SAID END PORTION EXTENDING OVER A PORTION ONLY OF SAID BURNER PORT, THE ANGLE BETWEEN THE AXIS OF SAID PORT AND THE DIRECTION OF EXTENT OF SAID END PORTION, AND THE SPACING BETWEEN SAID PORT AND END PORTION, BEING SO RELATED THAT FUEL MIXTURE ISSUING FROM SAID PORTION OF SAID PORT IS CAUSED TO IMPINGE AGAINST SAID END PORTION AT AN ABRUPT ANGLE AND WITH A VELOCITY ADEQUATE TO TURBULATE AND DIVERT SAID MIXTURE INTO SAID FLASH TUBE IN SUFFICIENT QUANTITY TO SUPPORT COMBUSTION, SAID LOWER WALL PORTIONS DEFINING AN OPENING BELOW AND SPACED HORIZONTALLY FROM SAID BURNER PORT INTO WHICH AIR IS ENTRAINED BY THE FLOW OF THE MIXTURE DIVERTED INTO SAID FLASH TUBE.