Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Lubricant testing
Patent
1993-12-30
1995-07-25
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Lubricant testing
2041531, 204409, 324663, 324698, 324449, 422 8201, 422 8202, G01N 2726, G01N 3330
Patent
active
054351707
ABSTRACT:
A method and apparatus for determining the quality of a lubricant by its solvating effect on an insoluble (resin) matrix to which charged groups have been covalently bound. The solvating effects are measured electronically as a variation in conductivity or capacitance of the resin matrix with respect to temperature. The apparatus includes a metal mesh housing containing e.g. milligram amounts of charged resin beads. A metal probe is fitted in the containing mesh and makes contact only with the resin beads. The entire device is immersed in the lubricant and the electrical conductivity or capacitance is measured from the probe to the mesh through the resin beads. Lubricant degradation is measured as e.g. a decrease in electrical conductivity through the resin beads with respect to an increase in the lubricant's solvent polarity.
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Mike Allen, "Car Clinic", Popular Mechanics, Aug. 1993, p. 71.
Hedges Joe D.
Voelker Paul J.
Brock Michael J.
Klivans Norman R.
Williams Hezron E.
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