Telectro-Mek, Inc.

Steven E Modezjewski

Michael R Miller

Daniel G Russ, Deceased

Vilmer L Nichols

A fuel contamination detection system for use in testing the contamination level of a fuel sample, wherein the system is selectively operable in a first mode as a particulate detector and in a second mode as a free water detector. A filter support slide includes two apertures and is adapted to support different sizes of filter elements over the apertures. In the particulate detector mode, the slide carries a pair of filter elements through which a fuel sample has been passed, wherein one filter element bears particulates from the sample. A particulate detection circuit includes an incandescent light and a photocell, between which the slide is moved to introduce one filter element and then the other, whereby a differential reading of their respective opacities is obtained and displayed. In the free water detector mode, only one aperture of the slide is used to carry a chemically treated water filter pad. A free water detector circuit includes an ultraviolet light and a photoresistor, adjacent which the slide is moved to expose the water filter pad to the ultraviolet such that the photoresistor responds to light fluorescing from the water filter pad, whereby a reading of the fluorescent light intensity is obtained and displayed. Optical switches cooperate with positioned holes in the filter support slide to provide slide position sensing that is used by the circuits for test sequencing and that provides visual prompts to a system operator.

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Fort Wayne, IN, United States of America

Steven E Modezjewski