Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1983-07-22
1985-12-24
Krawczewicz, Stanley T.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
73105, G01R 2726
Patent
active
045609241
ABSTRACT:
An elongated carriage has a first capacitive probe disposed from its top surface opposite to an object surface, and a second capacitive probe disposed from its bottom surface opposite to a level reference surface. An arm is orthogonally disposed from the elongated carriage member to provide lateral support. The carriage is moveably supported at opposite ends of the elongated member and at the distal end of the arm by three rolling members which roll in corresponding grooves of supporting members as the carriage is moved in lateral increments with respect to the stationary object and reference surfaces. The first capacitive probe and the object surface comprise a first capacitor, and the second capacitive probe and the reference surface comprise a second capacitor. As the carriage moves laterally, the first probe is moved across the object surface while the second probe is moved across the reference surface. The capacitance of each probe is translated into a distance measurement. The distance values derived from the first capacitor are utilized with the distance values derived from the second capacitor to generate numerical information describing the flatness of the object surface. The apparatus self-corrects for any translational deviations of the carriage.
REFERENCES:
patent: 3187253 (1965-06-01), Whitmore
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patent: 3278843 (1966-10-01), Deming
patent: 3287637 (1966-11-01), Keller
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patent: 3671857 (1972-06-01), Bergmanis et al.
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patent: 4339709 (1982-07-01), Brihier
Ade Corporation Instruction Manual for Microsense 3046A, pp. 1--1 and 3-1 to 3-7.
Genovese Joseph A.
Harvey Jack B.
Krawczewicz Stanley T.
Magnetic Peripherals Inc.
Niebuhr Frederick W.
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