Grinding machine

Claim 1

IN A GRINDING MACHINE HAVING A ROTATABLE TOOL PROVIDED WITH ABRASIVE PARTICLES ON ITS WORKING FACE FOR SHAPING A WORKPIECE, AND MEANS FOR SUPPLYING A LIQUID FROM A SOURCE TO THE INTERFACE BETWEEN THE TOOL WORKING FACE AND THE WORKPIECE, A LIQUID COLLECTOR APPARATUS, COMPRISING IN COMBINATION, AN ANNULAR SHROUD HAVING A SKIRT PORTION SURROUNDING THE TOOL IN RADIALLY SPACED RELATION THERETO AND A REAR WALL PORTION SPACED FROM THE REAR OF THE TOOL TO DEFINE A CHAMBER, THE FORWARD EDGE OF THE SHROUD SKIRT PORTION BEING POSITIONED ACIALLY TO THE REAR OF THE TOOL WORKING FACE, A PLURALITY OF BRISTLE BEARING UNITS ARRANGED IN CIRCUMFERENTIALLY ABUTTING RELATIONSHIP AROUND THE OUTER SURFACE OF THE SHROUD SKIRT PORTION WITH THE BRISTLES NORMALLY PROJECTING BEYOND THE TOOL WORKING FACE IN THE DIRECTION OF THE WORKPIECE TO DEFINE A BRISTLE RING TO PREVENT THE ESCAPE TO THE ADJACENT ATMOSPHERE OF LIQUID MIST AND SPRAY, RESILIENT MEANS ENGAGEABLE WITH THE BRISTLE BEARING UNITS TO HOLD THEM IN POSITION AGAINST THE SHROUD SKIRT PORTION AND TO PERMIT THEM TO BE SELECTIVELY INDIVIDUALLY PIVOTED SO THAT THE BRISTLES PROJECT AWAY FROM THE SHROUD IN A PLANE PARALLEL TO AND BEHIND THE TOOL WORKING FACE FOR ENTRY OF THE WORKPIECE, AND SUCTION MEANS CONNECTED TO THE SHROUD TO DRAW THE MIST AND SPRAY FROM THE SPACE WITHIN THE BRISTLE RING AND THROUGH THE ANNULAR SPACE BETWEEN THE PERIPHERY OF THE TOOL AND THE SHROUD SKIRT PORTION AND THE CHAMBER BEHIND THE TOOL.