Process of producting gases by pyrolysis

Claim 1

A PROCESS OF PRODUCING AN OFF-GAS CONTAINING A SUBSTANTIAL PROPORTION OF A DESIRED HYDROCARBON FROM AN IN-GAS CONTAINING A SUBSTANTIAL PROPORTION OF A SUITABLE HYDROCARBON, WHICH CONSISTS OF A PREHEATING STEP AND CYCLIC PROCESS CONSISTING OF HEAT AND MAKE STEPS, SAID STEPS BEING DEFINED AS FOLLOW: IN THE PREHEATING STEP HOT GASES OF COMBUSTION ARE PASSED FROM A CENTRAL COMBUSTION SPACE OUTWARDLY THROUGH CHANNELS IN A FIRST AND A SECOND REGENERATIVE MASS: IN THE HEAT STEP A FUEL GAS IS PASSED INWARDLY THROUGH THE CHANNELS IN SAID FIRST REGENERATIVE MASS INTO SAID CENTRAL COMBUSTION SAPCE, AIR IS PASSED INWARDLY THROUGH THE CHANNELS IN SAID SECOND REGENERATIVE MASS INTO SAID CENTRAL COMBUSTION SPACE, AND THE GASES OF COMBUSTION FORMED BY THE BURNING OF SAID FUEL WITH SAID AIR IN SAID SPACE ARE PASSED THROUGH CHANNELS IN A THIRD REGENERATIVE MASS; AND IN THE MAKE STEP THE IN-GAS IS PASSED THROUGH SAID CHANNELS IN SAID THIRD REGENERATIVE MASS INTO SAID CENTRAL COMBUSTION SPACE AND OFF-GAS FROM SAID CENTRAL COMBUSTION SPACE IS PASSED THROUGH THE CHANNELS OF EITHER THE FIRST OR THE SECOND REGENERATIVE MASS.