Furnace assemblies and combination of such furnaces

Claim 1

A FURNACE ADAPTED TO FORM AN OF-GAS CONTAINING A DESIRED HYDROCARBON BY THE PYROLYSIS OF A SUITABLE HYDROCARBON, COMPRISING: A GAS-TIGHT METAL SHELL, A HEAT REFRACTORY LINING IN SAID SHELL, TWO MAIN REGENERATIVE MASSES SEPARATED BY A CENTRAL SPACE AND SO PLACED AS TO LEAVE AN END SPACE AT EACH END OF THE FURNACE, THREE AUXILIARY REGENERATIVE MASSES PLACED IN SAID CENTRAL SPACE, ALL OF THE REGENERATIVE MASSES BEING SO PLACED THAT PASSAGES THROUGH SAID MASSES PROVIDE OPEN PATHS FROM ONE END OF THE FURNACE TO THE OTHER END, SAID AUXILIARY MASSES BEING SPACED APART AN 1 SPACED FROM SAID MAIN MASSES TO DIVIDE SAID CENTRAL SPACE INTO FOUR SUBSPACES SEPARATED BY SAID AUXILIARY MASSES, FOUR SERIES OF FUEL FEEDING NOZZLES IN SAID FURNACE, EACH SERIES OF NOZZLES FEEDING FUEL INTO ONE OF SAID SUBSPACES, VALVE MEANS FOR FEEDING FUEL THROUGH EACH OF SAID NOZZLES, AND ADAPTED TO FEED FUEL IN SUBSTANTIALLY EQUAL AMOUNTS THROUGH ALL OF SAID NOZZLES, OR IN SUBSTANTIALLY EQUAL AMOUNTS ONLY TO THE TWO INNERMOST SUBSPACES, OR IN SUBSTANTIALLY EQUAL AMOUNTS ONLY TO THE TWO OUTERMOST SUBSPACES, OR IN SUBSTANTIALLY EQUAL AMOUNTS TO THE OUTERMOST OF SAID SUBSPACES AND IN REDUCED AMOUNTS TO THE INNERMOST OF SAID SUBSPACES, AND AIR VALVE MEANS FOR FEEDING AIR INTO EACH OF SAID END SPACES, SAID MEANS BEING SO PLACED AND OPERATED THAT AIR IS FED INTO EACH END SPACE WHENEVER FUEL IS BEING FED INTO THAT END OF SAID CENTRAL SPACE.