Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1979-10-11
1982-07-06
Gantz, Delbert E.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204DIG9, 323281, 330265, 363 97, C25D 1122, G05F 144
Patent
active
043381766
ABSTRACT:
A system for generating and autocontrolling the voltage or current wave form in a process for the electrolytic coloring of anodized aluminium includes feeding power from a source of symmetrical direct current, with a neutral connection directly coupled to a load, while the positive and negative voltages supplied by the source pass through a power control stage which is controlled by a bipolar operational amplifier. The bipolar operational amplifier has two signal inputs, a positive or non-inverting input which is connected to a signal generator, and a negative or inverting input having a signal which corresponds to the signal which actually exists on the electrodes of the electrolytic bath. This signal is processed in a half-wave outer controller which is controlled by a programming system.
REFERENCES:
patent: 3550025 (1970-12-01), Stodolsky
patent: 3875496 (1975-04-01), Carsten
patent: 3983014 (1976-09-01), Newman et al.
patent: 4011152 (1977-03-01), Rodriguez-Martinez
patent: 4041367 (1977-08-01), Gold et al.
John D. Lenk, Handbook of Modern Solid-State Amplifiers, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 1974, pp. 334-338.
Empresa Nacional del Aluminio, S.A.- (ENDASA)
Gantz Delbert E.
Leader William
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