Diffusion-pump construction

Claim 1

IN A DIFFUSION PUMP, THE COMBINATION COMPRISING A CASING HAVING A SIDE WALL, TOP AND BOTTOM AND AN UPPER INLET AND A LOWER OUTLET, A SUMP IN A LOWER CASING REGION FOR CONTAINING LIQUID TO BE VAPORIZED, VAPOR-JET MEANS IN SAID CASING ABOVE SAID SUMP, SAID VAPOR JET MEANS COMPRISING A LOWER CHIMNEY, AN UPPER CHIMNEY, AND CLOSURE MEANS SELECTIVELY CLOSING SAID UPPER CHIMNEY FOR SELECTIVE PUMP OPERATION WITHOUT SAID UPPER CHIMNEY, SAID CLOSURE MEANS COMPRISING A CLOSURE ELEMENT MOVABLE UPWARDLY INTO AND DOWNWARDLY OUT OF CLOSING RELTAION WITH SAID UPPER JET CHIMNEY, AND CLOSURE ACTUATING MEANS DEPENDING FROM SAID CLOSURE THROUGH SAID BOTTOM, AND LIQUIDHEATING MEANS IN A LOWER REGION OF SAID CASING, SAID LIQUIDHEATING MEANS COMPRISING A HEATING ELEMENT SPACED OVER SAID SUMP, AND A WICK ENGAGING SAID HEATING ELEMENT AND DEPENDING THEREFROM INTO SAID SUMP FOR CONDUCTING LIQUID FROM SAID SUMP INTO ENGAGEMENT WITH SAID HEATING ELEMENT FOR VAPORIZATION THEREBY.