23 CENTRIFUGAL COOLANT CLARIFIERS AND PARTS THEREOF, FOR USE WITH GRINDING MACHINES, DRILLING MACHINES, LATHES, CAPSTANS, BORING MACHINES, SHAPERS, MILLING MACHINES AND SIMILAR TYPES OF SPECIAL PURPOSE MACHINES USED IN THE WORKING OF METALS MAKING USE MAINLY OF CUTTING ACTION OF THE TOOLS WHICH ARE AN INTEGRAL PART OF THE MACHINE