Spiral-bevel and hypoid gear cutting machine

Claim 1

IN A GEAR CUTTING MACHINE, THE COMBINATION OF A MACHINE FRAME, A ROTOR MOUNTED IN SAID FRAME FOR ROTATION ABOUT A FIRST AXIS SAID ROTOR HAVING AN OPENING WITH AN AXIS INTERSECTING SAID FIRST AXIS AND BEING INCLINED RELATIVE TO SAID FIRST AXIS BY A PREDETERMINED ANGLE, A SWASH PLATE SUPPORTED IN SAID OPENING OF THE ROTOR FOR ANGULAR ADJUSTMENT RELATIVE TO THE ROTOR ABOUT SAID AXIS OF THE OPENING, SAID SWASH PLATE HAVING AN OPENING WITH AN AXIS INTERSECTING SAID AXIS OF THE OPENING OF SAID ROTOR AT THE POINT OF INTERSECTION THEREOF WITH SAID FIRST AXIS AND BEING INCLINED WITH RESPECT TO SAID FIRST AXIS AT AN ANGLE EQUAL TO SAID PREDETERMINED ANGLE, A SWIVEL SUPPORTED IN SAID OPENING OF THE SWASH PLATE FOR ANGULAR ADJUSTMENT RELATIVE TO THE SWASH PLATE AND HAVING AN OPENING WITH AN EXTENDING AXIS PARALLEL TO, AND OFFSET RADIALLY FROM, SAID AXIS OF THE OPENING OF THE SWASH PLATE, AN ECCENTRIC CYLINDER SUPPORTED IN SAID OPENING OF THE SWIVEL FOR ANGULAR ADJUSTMENT WITH RESPECT TO THE SWIVEL ABOUT SAID AXIS OF THE OPENING IN THE SWIVEL, A SPINDLE ROTATABLY SUPPORTED IN SAID ECCENTRIC CYLINDER WITH THE AXIS OF SAID SPINDLE BEING PARALLEL TO, AND OFFSET RADIALLY FROM, SAID AXIS OF THE OPENING IN THE SWIVELL, A FACE MILL TYPE ANNULAR CUTTER ON SAID SPINDLE TO DEFINE A TOOTH OF AN IMAGINARY BEVEL GEAR HAVING A PITCH CONE WITH THE APEX OF THE LATTER PERMANENTLY LOCATED AT THE POINT OF INTERSECTION OF SAID FIRST AXIS AND OF THE AXES OF SAID OPENINGS IN THE ROTOR AND SWASH PLATE, RESPECTIVELY, WHICH POINT DEFINES A FIXED MACHINE CENTER, EVEN AS THE AXIS OF SAID SPINDLE IS TILTED RELATIVE TO SAID FIRST AXIS AND SHIFTED RELATIVE TO SAID MACHINE CENTER BY ROTATIONAL ADJUSTMENT OF SAID SWASH PLATE, SWIVEL AND ECCENTRIC CYLINDER, AND CONTINUOUSLY ENGAGED DRIVING MEANS FOR ROTATING SAID SPINDLE AS THE LATTER IS TILTED AND SHIFTED WITH RESPECT TO SAID FIRST AXIS AND SAID MACHINE CENTER, RESPECTIVELY.