Method of casting a revolver frame

Claim 1

THE METHOD OF CASTING A ONE-PIECE REVOLVER FRAME HAVING A CHAMBER THEREIN DEFINED BY SPACED SIDE WALLS AND NARROW UPPER AND LOWER END WALLS HAVING HAMMER AND TRIGGER SLOTS THEREIN OPENING RESPECTIVELY INTO THE TOP AND BOTTOM OF SAID CHAMBER, SAID CHAMBER INCLUDING A PORTION EXTENDING REARWARDLY FROM ONE OF SAID SLOTS ALONG THE INSIDE OF ADJACENT END WALL, SAID METHOD INCLUDING THE STEPS OF, FORMING A MOLD CAVITY IN TWO LATERALLY SEPARABLE DIES TO CORRESPOND TO THE EXTERNAL SHAPE OF SAID FRAME, POSITIONING A FIRST WAFER-LIKE DRAW CORE IN SAID MOLD FOR WITHDRAWAL ALONG A RECTILINEAR PATH IN THE PLANE OF SAID HAMMER SLOT AND SUPPORTING THE CORE WITH ITS INNER END PORTION PROJECTING INTO THE CAVITY AND SPACED FROM THE SIDE WALLS OF THE CAVITY TO DEFINE THE HAMMER SLOT AND THE PORTION OF THE CHAMBER ADJACENT AND ALINED WITH THE HAMMER SLOT ALONG SAID PATH, POSITIONING A SECOND WAFER-LIKE DRAW CORE IN SAID MOLD FOR WITHDRAWAL ALONG A RECTILINEAR PATH IN THE PLANE OF SAID TRIGGER SLOT FOR WITHDRAWAL ALONG A RECTILINEAR PATH IN THE PLANE OF THE TRIGGER SLOT AND SUPPORTING SAID SECOND CORE WITH ITS INNER END PORTION PROJECTING INTO THE CAVITY AND SPACED FROM THE SIDE WALLS THEREOF TO DEFINE SAID TRIGGER SLOT AND THE PORTION OF SAID CHAMBER ALINED THEREWITH, SAID DRAW CORES FITTING TOGETHER WITHIN SAID CAVITY TO FORM A CONTINUOUS COMPOSITE CORE EXTENDING THROUGH THE CAVITY, INSERTING A THIRD CORE IN SAID CAVITY PRIOR TO CLOSING SAID DIES AND SUPPORTING SAID THIRD CORE IN SPACED RELATION WITH SAID CAVITY SIDE WALLS AND SAID END WALLS WITH SAID THIRD CORE ABUTTING AGAINST AND PROJECTING LATERALLY FROM SAID COMPOSITE CORE TO DEFINE A PORTION OF SAID CHAMBER NOT ALINED WITH ONE OF SAID SLOTS, CASTING SAID FRAME OF MOLTEN MATERIAL IN SAID CAVITY AND AROUND SAID CORES, PULLING SAID DRAW CORES ALONG SAID PATHS FROM SAID MOLD, REMOVING THE CAST FRAME FROM SAID MOLD, AND DISLODGING SAID THIRD CORE FROM SAID FRAME LATERALLY OF SAID PATHS AND REMOVING THE CORE FROM SAID FRAME.