Apparatus for determining dimensions
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United States of America Patent
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Sep 13, 1983
Grant Date -
N/A
app pub date -
Mar 27, 1980
filing date -
Mar 27, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus and method for determining dimensions of an object. In one embodiment, apparatus comprises a support structure, means for positioning an object, at least one gage member having a contact portion for contacting a surface of a positioned object and an edge movable with said contact portion. The gage member is positioned in a contact position in which it is in contact, or nearly in contact, with a position object. The position of the edge is proportional to a dimension of the object between the contacted surface and a reference point of the object. The reference point may be within the object, such as an axis of rotation, or on a surface of the object. A light source is provided to direct light onto the edge and a lens is used to focus the image of the edge on a light detector comprising a plurality of light sensitive elements capable of producing an output signal in response to incident light. Means are provided to analyze the output signals to determine the dimension of the object between the contacted surface and the reference point.
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