Pressure type oil feeding tank for oil

Claim 1

A PRESSURE TYPE OIL FEEDING APPARATUS FOR OIL FILLED APPLIANCES SUCH AS CABLES AND OIL FILLED ELECTRICAL MACHINES, INCLUDING A CLOSED CONTAINER WITH A SINGLE CHAMBER, AN EXPANSIBLE AND CONTRACTIBLE IMPERVIOUS CELL MEANS MOUNTED IN SAID CHAMBER OF THE CONTAINER AND OCCUPYING SUBSTANTIALLY ALL BUT INCAPABLE OF FILLING SAID CHAMBER WHEN FULLY EXPANDED THUS LEAVING A SPACE, A SEALED CONNECTION FROM THE APPLIANCE THROUGH SAID CHAMBER TO THE INTERIOR OF SAID CELL MEANS AN INSULATING OIL COMPLETELY FILLING THE APPLIANCE AND SAID CELL MEANS AND SAID SEALED CONNECTION HTEREBETWEEN TO PROVIDE MORE INSULATING OIL THAN IS ACTUALLY NEEDED TO FILL THE APPLANCE, A FLUID CONSISTING OF A LIQUID AND THE SATURATED VAPOR OF SAID LIQUID SEALED UNDER PRESSURE SAID SPACE IN SAID CHAMBER OF SAID CONTAINER AND EFFECTIVE TO EXERT PRESSURE ON SAID FILKLED CELL MEANS SAID LIQUID SELECTED TO REPEATEDLY PERMIT GASIFICATION AND LIQUEFACTION WITHIN SAID CHAMBER AND MEANS TO MAINTAIN SAID LIQUID AT ITS CONVERSION STATE OF GASIFICATION AND LIQUEFACTION TO MAINTAIN THE VARYING QUANTITRIES OF SEALD INSULATING OIL IN SAID CELL MEANS UNDER CONSTANT PRESSURE.