Norsk Hydro, A.s.

Lehmkuhl A/s

H-invent A/s

Hans K Holmen

Tormod Naterstad

Jan Hurlen

Sigmund Gjorven

An aluminum electrolysis cell comprises a cathode and a continuous anode disposed above the cathode. The anode is composed of carbon elements which are glued or in some other way connected to one another. Onto the anode, there are added new elements to replace carbon material consumed during the electrolysis process. The anode is divided into sections defined by easily detachable holders or cassettes which are disposed close to one another in a row longitudinally of the cell. The cassettes are each provided at their upper ends with projections designed to be detachably connected to bearer walls or structures along the long sides of the cell.

Aluminum electrolysis cell with continuous anode

Electrometallurgical cell arrangement

The invention relates to a method and apparatus for exact measurement of pressures by means of level or pressure measuring equipment of the bubble tube type. The equipment comprises a bubble tube, a source of pressure, a pressure transducer, and valves which are controlled by a sequence switch means. The invention is characterized in that immediately prior to taking a measurement the source of pressure is connected to the bubble tube for expelling possible liquid therein and in that the source of pressure is then disconnected from the bubble tube. The pressure transducer is connected to the bubble tube during a measuring interval of short duration.

Method and apparatus for exact measurement of pressures by means of

Growing community of inventors

Voyenenga, Norway

Hans K Holmen