Automatic hob shifter

Claim 1

THE COMBINATION OF A TRANSLATABLE SLIDE MEMBER, A HOB SPINDLE, MEANS MOUNTING SAID HOB SPINDLE FOR ROTARY AND AXIAL MOVEMENT RELATIVE TO THE SLIDE MEMBER, POWER-OPERATED CLAMPING MEANS FOR SAID SPINDLE-MOUNT ING MEANS NORMALLY OPERATIVE TO RETAIN THE SPINDLEMOUNTING MEANS IN A PRESELECTED AXIALLY ADJUSTED POSITION FIRST POWER MEANS FOR ACTUATING SAID CLAMPING MEANS, SECOND POWER MEANS ADAPTED WHEN ACTUATED TO EFFECT AXIAL MOVEMENT OF SAID MOUNTED MEANS A PRESELECTED UNIT DISTANCE, SELECTIVELY ADJUSTABLE MEANS TO VARY THE PRESELECTED UNIT DISTANCE, INDEPENDENTLY OPERABLE CONTROL MEANS FOR EACH OF SAID FIRST AND SECOND POWER MEANS, AND A COORDINATING SYSTEM OF CONTROLS RESPONSIVE TO TRANSLATION OF SIAD SLIDE MEMBER AND OPERATIVE NORMALLY TO EFFECT OPERATION OF SAID CONTROL MEANS THROUGH ONE CYCLE INCLUDING UNCLAMPING OF SAID SPINDLE-MOUNTING MEANS, THEN AXIAL MOVEMENT THEREOF, AND THEN A RECLAMPING OF THE SPINDLE-MOUNTING MEANS TO THE SLIDE MEMBER, AND ADDITIONAL SELECTIVELY OPERABLE MEANS ASSOCIATED WITH SAID SYSTEM OF CONTROLS FOR CAUSING SAID SYSTEM OF CONTROLS TO REPEAT THE AXIAL MOVEMENT PORTION OF THE CYCLE TWO OR MORE TIMES TO THEREBY OBTAIN TWO OR MORE PRESELECTED UNIT DISTANCES OF MOVEMENT OF THE MOUNTING MEANS BEFOR RECLAMPING OF THE SPINDLE-MOUNTING MEANS.