Mechanism for grooving mine hoist drums and the like

Claim 1

A MENCHANISM FOR GROOVING CABLE WINDING DRUMS OR THE LIKE INCLUDING A HORIZONTAL PLATFORM FOR POSITIONING A CABLE WINDING DRUM TO BE GROOVED IN A GENERALLY VERTICAL POSITION, MEANS FOR ROTATING SAID PLATFORM AND DRUM, A GROOVING TOOL AND A SUPPORT STRUCTURE THEREFOR, SAID TOOL BEING POSITIONED TO FORM A GROOVE GENERALLY PERPENDICULAR TO THE DRUM AXIS AS THE DRUM ROTATES, MEANS FOR MOVING SAID GROOVING TOOL IN A DIRECTION PARALLEL TO THE DRIM AXIS, INCLUDING A DRIVE MOTOR, AND MEANS FOR CONTROLLING THE AXIAL MOVEMENT OF SAID GROOVING TOIOL SUCH THAT DURING EACH COMPLETE ROTATION OF THE DRUM IT MOVES, IN AT LEAST ONE INCREMENT, A DISTANCE AT LEAST EQUAL TO THE WIDTH OF THE GROOVE BEING FORMED, INCLUDING A CLUTCH FOR ENGAGING AND DISENGAGING SAID DRIVE MOTOR, A BRAKE ARRANGED TO STOP AXIAL MOVEMENT OF SAID TOOL, AND MEANS FOR CAUSING SIMULTANEOUS ENGAGEMENT OF SAID CLUTCH AND RELEASE OF SAID BRAKE AND SUBSEQUENT SIMULTANEOUS DISENGAGEMENT OF SAID CLUTCH AND OPERATION OF SAID BRAKE.