By-pass gas-turbine engine

Claim 1

APPARATUS TO ADMIX COMPRESSED AIR WITH EXHAUST GASES COMPRISING A TUBULAR WALL DEFINING A DUCT HAVING AN UPSTREAM END DISPOSED TO RECEIVE THE EXHAUST GASES, A SERIES OF ANGULARLY-SPACED HOLLOW STRUTS PROJECTING RADIALLY INWARDS FROM THE TUBULAR WALL INTO THE SAID DUCT, THE HOLLOW SPACES OF SAID STRUTS BEING OPENED AT THEIR RADIALLY OUTER ENDS TO RECEIVE SAID COMPRESSED AIR AND HAVING AT LEAST AT THEIR INNER ENDS OUTLETS OPENING INTO THE SAID DUCT SO THAT THE COMPRESSED AIR FLOWING INTO THE HOLLOW STRUTS IS DELIVERED INTO SAID DUCT AND MIXED WITH THE EXHAUST GASES PASSING THROUGH THE SAME, EACH STRUT COMPRISING A BANK OF AXIALLY SPACED DELIVERY TUBES, PROJECTING RADIALLY INTO THE DUCT, EACH SAID TUBE HAVING A RADIALLY OUTER END AND A RADIALLY INNER END, THE DELIVERY TUBES RECEIVING AT THEIR RADIALLY OUTER ENDS SAID COMPRESSED AIR AND HAVING OUTLETS AT THEIR RADIALLY INNER ENDS, THE TUBES IN THE BANK PROJECTING INTO THE DUCT TO DIFFERENT RADIAL EXTENTS.