Geometrical instruments – Gauge – Having a movable contact probe
Reexamination Certificate
2007-09-20
2009-06-02
Smith, R. A. (Department: 2841)
Geometrical instruments
Gauge
Having a movable contact probe
C033S507000, C033S551000, C033SDIG020
Reexamination Certificate
active
07540096
ABSTRACT:
A spherometer for measuring at least one physical parameter of the workpiece includes at least on fluid-actuated linearly extensible probe member having an output indicative of an amount of linear travel and a chamber housing the linearly extensible probe member. The chamber has an aperture for supporting a workpiece and a vacuum line is coupled to the chamber for creating a vacuum. The probe member is activated as a result of the vacuum in the chamber, causing it to extend linearly toward the workpiece until touching it. The linear extension of the probe may be used as a measurement of distance. The distance measured to a workpiece may be compared to a standard to determine a physical parameter of the workpiece.
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Chernoff Vilhauer McClung & Stenzel LLP
Hardin Optical Co.
Smith R. A.
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