Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-05-21
1991-09-03
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
33645, G01V 904
Patent
active
050457101
ABSTRACT:
Apparatus for determining coplanarity of a plurality of points, comprising linear motion unit for moving an object along an linear axis. The object has a plane generally perpendicular to the axis. A gage defines a known plane which is also perpendicular to the axis and has a plurality of points thereon corresponding to points on the object. The gage also is adapted to move along the axis by said linear motion unit. Digital signal switches having individual sensors aligned on the axis for contact with the object and the gage are provided to send a set of signals to indicate the position of the object along the axis at each of the points and to provide a reference set of signals when contacted by the corresponding points on the gage. Also included is a comparator means for comparing the signals with the reference signals for each point and the corresponding point on the gage plane to identify the deviation of each point from coplanarity.
REFERENCES:
patent: 3278023 (1966-10-01), Schneider
patent: 4739175 (1988-04-01), Tamura
patent: 4814621 (1989-03-01), Soth et al.
Claffey Edward T.
Linker, Sr. Frank V.
American Tech Manufacturing Corp.
Le Que T.
Nelms David C.
Renz Jr. Eugene E.
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