Thermal change compensation mechanism

Claim 1

IN A MACHINE TOOL HAVING A SPINDLE CARRIER AND A SPINDLE SUPPORTED FOR ROTATION ON AN AXIS THEREIN, SAID SPINDLE SUBJECT TO TEMPERATURE CHANGES PRODUCING AXIAL DIMENSION CHANGES THEREOF, A THERMALLY ADJUSTED SPACER MECHANISM TO COMPENSATE FOR THE AXIAL SPINDLE DIMENSION CHANGES COMPRISING: (A) MEANS DEFINING A SHOULDER AROUND SAID SPINDLE, (B) A LOCATING MEMBER RECEIVED IN THE SPINDLE CARRIER AT A FIXED LOCATION THEREIN, THE SPINDLE AXIALLY MOVABLE RELATIVE TO SAID LOCATING MEMBER, (CE A FIRST ANNULAR MEMBER RECEIVED AROUND SAID SPINDLE BETWEEN SAID SHOULDER AND LOCATING MEMBER AND HAVING (1) A SIDE FACE INCLINED RELATIVE TO THE AXIAL DIRECTION OF THE SPINDLE AND (2) A PREDETERMINED RATE OF RADIAL DIMENSION CHANGE WHEN THE TEMPERATURE THEREOF CHANGES, (D) A SECOND ANNULAR MEMBER RECEIVED AROUND SAID SPINDLE BETWEEN SAID SHOULDER AND LOCATING MEMBER AND HAVING (1) A SIDE FACE COMPLIMENTARY TOAND RECEIVED AGAINST SAID FIRST ANNULAR MEMBER SIDE FACE, SAID FIRST MEMBER SIDE FACE EXTENDING OBLIQUELY INTO SAID SECOND MEMBER AND (2) A PREDETERMINED RATE OF RADIAL DIMENESION CHANGE WHEN THE TEMPERATURE THEROEF CHANGES GREATER THAN SAID FIRST ANNULAR MEMBER RATE WHEREBY SAID ANNULAR MEMBERS RELATIVELY SLIP AT SAID INCLINED SIDE FACES THEREOF TO ALTER THE COMBINED AXIAL THICKNESS OF SAID ANNULAR MEMBER INVERSELY AS THE AXIAL SPINDLE DIMENSIONS CHANGES, AND (E) MEANS TO PRODUCE AN AXIAL FORCE ON SAID SPINDLE TENDING TO MOVE SAID SHOULDER AND LOCATING MEMBER TOGETHER, SAID SHOULDER AND LOCATING MEMBER SEPARATED BY SAID ANNULAR MEMBERS THEREBETWEEN.