Vacuum diffusion pump

Claim 1

IN A VACUUM DIFFUSION PUMP HAVING A VERTICAL CYLINDRICAL HOUSING AND A BOTTOM WALL SECURED TO THE LOWER END THEREOF AND DEFINING THEREWITH A NOZZLE ASSEMBLY FOR EXPANDING AND ACCELERATING OIL VAPOR, AN OIL CHARGE DISPOSED IN THE LOWER END OF SAID HOUSING, A PLURALITY OF HORIZONTALLY DISPOSED CYLINDRICAL TUBES SECURED WITHIN SAID HOUSING ABOVE THE UPPER SURFACE OF SAID OIL CHARGE, SAID TUBES BEING EACH PROVIDED WITH AN OPEN END WHICH IS DISPOSED EXTERIORLY OF SAID HOUSING, AN ELECTRIC HEATING ELEMENT DISPOSED WITHIN EACH OF SAID TUBES FOR CONTINUOUSLY GENERATING OIL VAPOR FROM SAID OIL CHARGE, EACH OF SAID TUBES HAVING A PLURALITY OF LONGITUDINALLY SPACED PARALLEL HEAT CONDUCTIVE PLATES SECURED THERETO PERPENDICULAR TO THE AXIS THEREOF, THE LOWER PARTS OF SAID PLATES BEING IMMERSED INTO SAID OIL CHARGE FOR HEATING AND VAPORIZING SAID OIL, AND THE UPPER PARTS OF SAID PLATES EXTENDING ABOVE THE LIQUID OIL CHARGE TO FURTHER HEAT THE VAPOR WHICH RISES VERTICALLY AFTER BEING FORMED AND WHICH PASSES BETWEEN THE UPPER PARTS OF SAID PLATES, SAID FURTHER HEATING BY THE UPPER PARTS OF SAID PLATES ACCELERATING THE FLOW OF VAPOR FORMED FROM SAID OIL CHARGE.