Ring fixture

Claim 1

A MACHINE FOR TURNING THE OUTER DIAMETER OF A PARTED PISTON RING, SAID MACHINE COMPRISING: A ROTATABLE HEAD HAVING A FACE; AN ANNULAR COLLAR HAVING A CENTRAL BORE AXIALLY ALIGNED WITH SAID HEAD, THE END OF SAID COLLAR DIRECTED TOWARD SAID HEAD HAVING A PLURALITY OF RESILIENT AXIALLY EXTENDING FINGERS EACH HAVING A FREE END PROXIMATE SAID HEAD; SAID BORE BEING TAPERED; SAID FREE ENDS OF SAID FINGERS HAVING A BORE DIAMETER LESS THAN THE OUTER DIAMETER OF A PISTON RING WHEN THE PISTON RING IS SUFFICIENTLY RESTRAINED TO EFFECT CLOSURE OF THE PART THEREIN AND THE OTHER END OF SAID BORE HAVING A DIAMETER GREATER THAN THE OUTER DIAMETER OF A PISTON RING WHEN THE PISTON RING IS IN A FREE STATE;MEANS FOR ADVANCING A PISTON RING AXIALLY THROUGH SAID COLLAR TO SEAT AGAINST SAID HEAD AND FOR CLAMPING THE PISTON RING TO SAID HEAD, SAID FINGERS RESILIENTLY CLAMPING THE PISTON RING AND POSITIONING IT WITH RESPECT TO THE AXIS OF ROTATION OF SAID HEAD IN RESPONSE TO THE RADIAL TENSION EXERTED BY EACH SEGMENTAL PORTION OF THE PISTON RING CONTACTED BY ONE OF SAID FINGERS;MEANS FOR WITHDRAWING SAID COLLAR FROM THE PISTON RING; AND TOOL MEANS FOR MACHINING THE OUTER DIAMETER OF THE PISTON RING.