Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1986-08-13
1988-02-02
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204228, 204245, C25C 320, C25D 1700
Patent
active
047227753
ABSTRACT:
In an aluminium reduction cell, the height of the anodes within the cell are controlled automatically, usually by computer. Means (S1 . . . SN, C1 . . . CN) are provided for making small anode movements in order to effect this automatic control but, for safety reasons, these control movements are limited to a maximum preset duration by timers (T1,T2). These are occasions, however, when longer anode movements need to be undertaken and the present apparatus provides means (6) for overriding these timers during such longer anode movements. Various safety measures are incorporated in this overriding function to ensure that safety requirements are maintained.
REFERENCES:
patent: 2731412 (1956-01-01), Ferrand
patent: 3329592 (1967-07-01), Uhrenholdt
patent: 3361654 (1968-01-01), Deprez et al.
patent: 3594300 (1971-07-01), Schafer
patent: 3817846 (1974-06-01), Gebauer et al.
patent: 4210513 (1980-07-01), Mutschler et al.
patent: 4448660 (1984-05-01), Fabian
Alcan International Limited
Valentine Donald R.
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