The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1983
Filed:
Dec. 02, 1981
John D Fales, Huntington Station, NY (US);
Other;
Abstract
An electrokinetic display system in which zones or patterns of different chemical concentrations and gradients associated therewith are displayed in an electrochemical cell. The electrolyte contains reagents which take part in a reversible reaction during electrolysis. The reagents are self-indicating or include an indicator, or can be mixtures of both. Gas evolved at the electrodes is prevented from mixing the electrolyte too vigorously. D.C. current is passed between the cell electrodes in one direction long enough to establish a visible flow in the electrolyte. The use of reagents which take part in redox reactions or in which a reversible change in pH takes place is set forth. In a preferred embodiment, the active species in the electrolyte including the electrolysis reaction products are accelerated by a magnetic field transverse to the electric current path. Arrangements for widely varying the visible or multicolored eddy current patterns generated are set forth including moving the magnetic field, varying the current as by reversing and/or interrupting the current, and using alternating current. Also set forth are arrangements for excluding pH or redox indictors from the region of the electrodes.