Die casting apparatus

Claim 1

IN A DIE CASTING MACHINE HAVING SEPARABLE DIE PARTS AND MEANS OR MOVING SAID DIE PARTS TO CLOSED POSITION TO FORM A DIE CAVITY AND TO OPEN POSITION FOR REMOVAL OF A CASTING THEREFROM, A POT, A SHOT CYLINDER HAVING A FILL-PORT COMMUNICATING WITH THE POT, A GOOSENECK AND NOZZLE CONNECTED WITH THE SHOT CYLINDER, A SHOT PLUNGER IN THE CYLINDER MEANS FOR TRAVELING THE PLUNGER FROM A STARTING POSITION ABOVE THE FILL-PORT TO CLOSE THE FILL-PORT AND FORCE MOLTEN METAL FROM THE CYLINDER THROUGH THE GOOSENECK AND NOZZLE INTO THE DIE CAVITY AND FOR RETURNING THE PLUNGER TO ITS STARTING POSITION: THE IMPROVEMENT COMPRISING MECHANICAL TOP MEANS FOR POSITIVELY ARRESTING THE RETURN MOVEMENT OF THE PLUNGER BEFORE IT PASSES THE FILL-PORT AND OPENS THE SAME TO THE CYLINDER; AND MEANS ACTUATED BY THE MOVABLE DIE PART AS AN INCIDENT TO THE OPENING MOVEMENT OF THE LATTER FOR CAUSING SAID STOP MEANS TO BE RENDERED INOPERATIVE TO ARREST THE PLUNGER AND HENCE PERMIT MOVEMENT THEREOF TO STARTING POSITION ABOVE THE FILLPORT AFTER THE DIE PARTS HAVE SEPARATED.