Blades for fluid flow machines

Claim 1

AN AEROFOIL BLADE ADAPTED FOR USE IN TURBINES, COMPRESSORS AND THE LIKE, SAID BLADE BEING FORMED OF HEAT CONDUCTIVE MATERIAL AND HAVING EXTERNAL AEROFOIL SURFACES AND HAVING WALLS DEFINING AN INTERNAL FLUID CONDUIT, AND WALLS DEFINING AT LEAST TWO INTERNAL COOLING FLUID SUPPLY PASSAGEWAYS, SOME OF SAID WALLS BEING COMMON TO CONDUIT AND PASSAGEWAYS, SAID COMMON WALLS BEING THICK AND DISPOSED AT RIGHT ANGLES TO THE AEROFOIL SURFACE OF THE BLADE, SLOTS FORMED THROUGH SAID COMMON WALLS ADJACENT THE MIDLENGTH ONLY THEREOF, SAID SLOTS BEING OBLIQUE TO SAID COMMON WALLS IN SUCH A WAY THAT WHEN A COOLING FLUID IS SUPPLIED TO THE SUPPLY PASSAGEWAYS IT EMERGES FROM SAID SLOTS INTO SAID FLUID CONDUIT IN TWO STREAMS WHICH ARE EACH DIRECTED OBLIQUELY TOWARDS A PORTION OF SAID CONDUIT WALLS REMOTE FROM SAID SLOTS, WHEREBY SUBSTANTIALLY THE WHOLE OF SAID TWO STREAMS IMPINGE AGAINST SAID CONDUIT WALLS AND SAID TWO STREAMS ALSO IMPINGE AGAINST EACH OTHER AND CREATE TURBULENCE WITHIN THE FLUID CONDUIT, SAID CONDUIT ALSO OPENING EXTERNALLY OF THE BLADE AT BOTH ENDS THEREOF AND FORMING ESCAPE PASSAGES FOR THE COOLING FLUID FROM THE BLADE.