Centrifugal casting machine for making dental castings

Claim 1

IN A CENTRIFUGAL CASTING MACHINE, THE COMBINATION COMPRISING A SUPPORT FOR A MOLD TO PRODUCE THE DESIRED CASTING, A CRUCIBLE HAVING A CAVITY ADAPTED TO RECEIVE A METAL INGOT TO BE MELTED AND AN OUTLET, MEANS FOR MOUNTING SAID CRUCIBLE WITH SAID OUTLET COMMUNICATING RADIALLY OUTWARDLY WITH SAID MOLD, A CONDUCTOR PROJECTING UPWARDLY THROUGH SAID CRUCIBLE INTO ELECTRICALLY CONDUCTIVE RELATIONSHIP WITH THE NORMAL POSITION OF AN INGOT SUPPORTED THEREIN AND INTERCONNECTING THE INGOT-RECEIVING CAVITY OF SAID CRUCIBLE TO GROUND, AN ELECTRODE MOVABLE INTO ELECTRIC ARC HEATING RELATIONSHIP WITH AN INGOT CONTAINED IN THE CAVITY OF SAID CRUCIBE, CONNECTIONS FROM SAID ELECTRODE TO A SOURCE OF ELECTRICAL ENERGY TO ESTABLISH SAID HEATING ARC BETWEEN SAID ELECTRODE AND SAID INGOT, MEANS SURROUNDING SAID ELECTRODE AND INTERCONNECTED WITH A SOURCE OF INERT GAS TO PROJECT A BLANKET OF SAID GAS AGAINST AND AROUND SAID INGOT TO SHIELD THE SAME AGAINST OXIDATION DURING SAID ELECTRIC ARC HEATING, AND MEANS TO ROTATE SAID CRUCIBLE AND MOLD TO FORCE INTO SAID MOLD METAL MELTED IN SAID CRUCIBLE BY SAID SHIELDED ELECTRIC ARC HEATING.