Indexing mechanism

Claim 1

A TURRET AND INDEXING MECHANISM COMPRISING A SUPPORT, A TURRET ROTATABLY MOUNTED THEREON, AN OSCILLATING MEMBER MOUNTED ON THE SUPPORT FOR MOVEMENT RELATIVE THERETO AND THE TURRET, A DRIVING MEMBER MOUNTED ON THE OSCILLATING MEMBER FOR MOVEMENT THEREWITH AND RELATIVE THERETO, A REVERSIBLE PISTON AND CYLINDER ASSEMBLAGE CONNECTED TO THE DRIVING MEMBER AND OPERABLE TO DRIVE THE DRIVING MEMBER IN OPPOSITE DIRECTIONS, SELECTIVELY, ALONG A PREDETERMINED PATH, DETENT MEANS ON THE DRIVING MEMBER, A CAM FOLLOWER CONNECTED TO THE DRIVING MEMBER, A COMPLEMENTARY DETENT RECEIVING MEANS ON THE TURRET, A CAM MOUNTED ON THE SUPPORT AND MOVABLE RELATIVE THERETO IN OPPOSITE DIRECTIONS, AND WHEN MOVED IN ONE DIRECTION TO A GIVEN POSITION, BEARING AGAINST THE FOLLOWER AND THEREBY HOLDING THE DETENT MEANS IN COOPERATIVE RELATION TO THE COMPLEMENTARY DETENT RECEIVING MEANS DURING MOVEMENT OF THE DRIVING MEMBER IN THE INDEXING DIRECTION AND WHEN MOVED IN THE OPPOSITE DIRECTION TO ANOTHER POSITION, RELEASING THE FOLLOWER FOR PERMITTING RELEASE OF THE DETENT MEANS FROM THE DETENT RECEIVING MEANS DURING MOVEMENT OF THE DRIVING MEMBER IN THE OPPOSITE DIRECTION, POWER MEANS CONNECTED TO THE CAM AND OPERABLE TO MOVE THE CAM IN SAID OPPOSITE DIRECTIONS TO SAID POSITIONS, SELECTIVELY, A SOURCE OF HYDRAULIC FLUID UNDER PRESSURE, CONTROL MEANS CONNECTING SAID SOURCE TO THE PISTON AND CYLINDER ASSEMBLAGE AT ONE SIDE OF THE PISTON AND ALSO CONNECTED SO AS TO VENT THE ASSEMBLAGE AT THE OPPOSITE SIDE OF THE PISTON, THROTTLE MEANS CONNECTED TO SAID OPPOSITE SIDE AND OPERATIVE TO THROTTLE THE DISCHARGE FROM SAID OPPOSITE SIDE, AND THROTTLE OPERATING MEANS CONNECTED TO THE THROTTLE MEANS AND DRIVEN IN PREDETERMINED RELATION TO THE ROTATION OF THE TURRET IN THE INDEXING DIRECTION TO INCREASE THE DEGREE OF THROTTLING, BY THE THROTTLE MEANS PROGRESSIVELY IN MINUTE INCREMENTS AS THE TURRET APPROACHES FINAL INDEXED POSITION.