Blades for compressors, turbines and the like

Claim 1

IN COMBINATION IN A BLADE FOR COMPRESSORS, TURBINES, AND THE LIKE AND SUBJECT TO VIBRATORY STRESSES, A BLADE SHELL, A BLADE BASE AT THE ROOT END OF THE SHELL, SAID BASE HAVING A THICKENED INNER PORTION MERGING SMOOTHLY INTO INTEGRAL SPACED FLANGES EXTENDING TIPWARD INTO SAID SHELL AT SAID ROOT END THEREOF EACH LAPPING A SIDE WALL OF SAID SHELL AND BEING BONDED THERETO, SAID BASE FLANGES EXTENDING UPWARDLY AND INWARDLY FROM SAID THICKENED PORTION AND SMOOTHLY TAPERING IN THICKNESS TIPWARD TO A THIN EDGE, SAID FLANGES DEFINING A RECESS THEREBETWEEN WITHIN SAID ROOT END, A STIFFENER WITHIN SAID SHELL BONDED TO OPPOSITE INSIDE SURFACES OF SAID SIDE WALLS, SAID SHELL EXTENDING INWARD TO THE POINT AT WHICH SAID THICKENED PORTION MERGES WITH SAID FLANGES TO PROVIDE A CONTACTING AREA OF SUBSTANTIAL RADIAL EXTENT FOR SECURING SAID SHELL THERETO, SAID STIFFENER EXTENDING INTO SAID RECESS AND HAVING CHORDWISE EXTENDING STIFFENER FLANGES OF SUBSTANTIAL CHORDWISE EXTENT BONDED TO THE INSIDE SURFACES OF SAID BASE FLANGES, EACH SAID BASE FLANGE BEING POSITIONED BETWEEN A WALL OF SAID SHELL AND SAID STIFFENER FLANGE TO PROVIDE SMOOTHLY VARYING STRUCTURAL THICKNESSES TO PRECLUDE STRUCTURAL FAILURE FROM FATIGUE CAUSED BY SAID VIBRATORY STRESSES.