1. AN ELECTRICAL IGNITOR FOR LIGHTING FUEL BURNERS, COMPRISING A TUBULAR METAL CASING HAVING FRONT AND REAR ENDS, A PLURALITY OF INSULATING BLOCKS DISPOSED WITHIN SAID CASING AND HAVING BORES COAXIAL WITH SAID CASING, CONDUCTING MEANS OF SUBSTANTIALLY THE LENGTH OF SAID CASING EXTENDING INTO SAID BORES TO MOUNT SAID CONDUCTING MEANS COAXIALLY IN SAID CASING, SAID CONDUCTING MEANS HAVING A BORE EXTENDING THROUGH AT LEAST A PORTION OF ITS LENGTH, A CARBON ROD ELECTRODE DISPOSED WITHIN SAID CONDUCTING MEANS BORE, RESILIENT MEANS IN SAID CONDUCTING MEANS BORE URGING SAID ELECTRODE TOWARDS THE FRONT END OF SAID CASING, A CARBON PLUG IN SAID CASING AT SAID FRONT END THEREOF IN ELECTRICAL CONNECTION WITH SAID CASING AND CONTACTED BY SAID ELECTRODE, MEANS CLOSING SAID FRONT END OF SAID CASING, SAID CASING HAVING APERTURE MEANS ADJACENT THE PLUG-CONTACTING END OF SAID ELECTRODE FOR ENTRY OF FUEL TO BE IGNITED, AND MEANS TO SUPPLY ELECTRIC CURRENT TO SAID CONDUCTING MEANS AND SAID CASING.