Fuel distribution system for multiple burners in a gas turbine engine

Claim 1

IN A VARIABLE FLOW RATE FUEL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE HAVING A COMPRESSOR AND A COMBUSTOR IN WHICH PRIMARY AND SECONDARY SUBSYSTEMS ARE PROVIDED FOR LOWER AND HIGHER FLOWS, RESPECTIVELY, MEANS FOR DISTRIBUTING THE FUEL SUPPLY BETWEEN THE SUBSYSTEMS IN RELATION TO THE DEMANDS OF THE ENGINE COMPRISING, IN COMBINATION: AN INLET CONDUIT, A HIGH FLOW CONDUIT, A LOW FLOW CONDUIT, Y-BRANCH MEANS CONNECTING SAID CONDUITS, SPOOL VALVE MEANS IN SAID HIGH AND LOW FLOW CONDUITS MOVABLE BETWEEN A FIRST POSITION WHERE SAID LOW FLOW CONDUIT IS OPEN AND SAID HIGH FLOW CONDUIT IS CLOSED AND A SECOND POSITION WHERE SAID LOW CONDUIT IS CLOSED AND SAID HIGH FLOW CONDUIT IS OPEN, AND MOTOR MEANS TO MOVE SAID SPOOL VALVE MEANS BETWEEN SAID FIRST AND SECOND POSITIONS, SAID MOTOR MEANS BEING RESPONSIVE TO THE COMPRESSOR DISCHARGE-COMBUSTOR PRESSURE DIFFERENTIAL WHICH IS INDICATIVE OF AIR PRESSURE AVAILABLE FOR ATOMIZATION WHEREBY SAID SPOOL VALVE MEANS OPENS EITHER SAID HIGH OR SAID LOW FLOW CONDUITS TO FLOW FUEL IN RESPONSE TO AIR PRESSURE AVAILABLE.