Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1974-12-26
1977-04-19
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204228, 204272, 204273, 204275, C25C 120, C25C 700
Patent
active
040186580
ABSTRACT:
A system for optimizing current density versus voltage across a device for electroplating recoverablesilver from expended photographic solutions by controlling voltage applied across the electrodes of the device as a controlled function of current flow through the device, current being sensed in terms of voltage across a resistance in series with the device, and that voltage, after comparison with reference voltages being employed to control a voltage regulator in the circuit between a source of dc voltage and the electrodes. The cathode of the device is a removable flexible stainless steel cylinder, and is contained in a cylindrical tank of larger diameter than that of the cathode. The anode is a hollow graphite cylinder on which pivots an arm bearing two stirring paddles which is rotated from interiorly of the anode by means of a magnetic clutch.
REFERENCES:
patent: 3551318 (1970-12-01), Snook et al.
patent: 3616435 (1971-10-01), Favell et al.
patent: 3875032 (1975-04-01), Thompson
patent: 3925184 (1975-12-01), Cave
Alfin Norman J.
Scott Robert
Kaplan G. L.
Merlin Industries, Inc.
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