Wall thickness measuring method and apparatus

Patent · Tue Jan 17 04:00:00 EST 1989

OSTI ID:6026939

Salzer, L J; Bergren, D A

An apparatus for measuring the wall thickness of a nonmagnetic article having a housing supporting a magnet and a contiguous supporting surface is described. The tubular article and the housing are releasably secured to the supporting surface and a support member of an optical comparator, respectively. To determine the wall thickness of the article at a selected point, a magnetically responsive ball is positioned within the tubular article over the point and retained therein by means of a magnetic field produced by the magnet. Thereafter, an optical comparator is employed to project a magnified image of the ball on a screen and the wall thickness a the selected point is calculated by using a ball surface measurement taken with the comparator in conjunction with a previously determined base line measurement.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4798002
• OSTI ID: 6026939
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
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700102* -- Fusion Energy-- Plasma Research-- Diagnostics
DIMENSIONS
ELECTRONIC EQUIPMENT
EQUIPMENT
FIRST WALL
MAGNETIC FIELDS
MAGNETS
MEASURING METHODS
OPTICAL EQUIPMENT
OPTICAL SCANNERS
THERMONUCLEAR REACTOR WALLS
THICKNESS