Gas dish washer

Claim 1

A DISHWASHER UTILIZING GAS IN OPERATION THEREOF COMPRISING A CABINET WITH WALLS, A TUB WITHIN THE CABINET HAVING A BOTTOM WALL ABOVE THE LOWEST PART OF THE CABINET AND OPPOSITE SIDE WALLS, A WATER COLLECTING SUMP DEPENDING FROM THE BOTTOM WALL OF THE TUB FOR COLLECTING A QUANTITY OF WATER THEREIN BEFORE THE WATER SURFACE REACHES THE LEVEL OF THE TUB BOTTOM WALL, SAID SUMP HAVING A PERIPHERAL WALL SPACED FROM THE CABINET WALLS, A HEAT EXCHANGE TUBE EXTENDING THROUGH THE SUMP FOR UNOBSTRUCTED EXPOSURE TO THE TUB AND HAVING A HEIGHT TO SPAN A MAJOR PART OF THE SUMP HEIGHT, A GAS BURNER POSITIONED WITHIN AN END OF SAID TUBE FOR BURNING OF GAS THEREIN, AND MEANS FOR CIRCULATING WATER WITHIN THE TUB.