Apparatus for grinding diamond knives

Claim 1

IN APPARATUS FOR GRINDING DIAMOND KNIVES; THE COMBINATION OF BASE, A SMOOTH SUBSTANTIALLY HORIZONTAL BEARING SURFACE ON SAID BASE, A SUPPORT PROJECTING UP FROM SAID BASE, TWO VERTICALLY SPACED V-SHAPED BEARINGS CARRIED BY SAID SUPPORT AND VERTICALLY ALIGNED WITH ONE ANOTHER ABOVE AND SPACED FROM SAID BEARING SURFACE, A VERTICAL SHAFT ROTATABLY JOURNALED IN SAID V-SHAPED BEARINGS AND HAVING A POINTED LOWER END RESTING ON SAID BEARING SURFACE, A HORIZONTAL GRINDING DISC HAIVING A SMOOTH UPPER SURFACE AND FIXED CENTRALLY ON SAID SHAFT TO ROTATE THEREWITH, A PULLEY FIXED ON SAID SHAFT BELOW SAID DISC, SAID DISC AND PULLEY BEING DISPOSED ADJACENT ONE ANOTHER AND BETWEEN AND ADJACENT SAID V-SHAPED BEARINGS, A DRIVING BELT RUNNING AROUND SAID PULLEY AND HOLDING SAID SHAFT IN CONTACT WITH SAID V-SHAPED BEARINGS BY BELT TENSION, A HOLDER FOR A DIAMOND ABOVE SAID DISC, AN ARM CARRYING SAID HOLDER, MEANS PIVOTALLY SUPPORTING SAID ARM FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL AXIS ABOVE SAID BASE, SAID HOLDER BEING POSITIONED TO PRESENT A DIAMOND TO THE UPPER SURFACE OF SAID DISC AT A SELECTED ANGLE AND MEANS FOR SELECTIVELY VARYING THE VERTICAL DISTANCE BETWEEN SAID BEARING SURFACE AND SAID PIVOTAL SUPPORTING MEANS TO SELECT THE PRECISE ANGLE A WHICH SAID DIAMOND IS PRESENTED TO THE UPPER SURFACE OF SAID DISC.