Wall thickness measuring method and apparatus
Abstract
An apparatus for measuring the wall thickness of a nonmagnetic article having a housing supporting a magnet and a contiguous supporting surface. 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 said 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 at the selected point is calculated by using a ball surface measurement taken with the comparator in conjunction with a previously determined base line measurement.
- Inventors:
-
- Los Alamos, NM
- Issue Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 866816
- Patent Number(s):
- 4798002
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- wall; thickness; measuring; method; apparatus; nonmagnetic; article; housing; supporting; magnet; contiguous; surface; tubular; releasably; secured; support; optical; comparator; respectively; determine; selected; magnetically; responsive; ball; positioned; retained; therein; means; magnetic; field; produced; thereafter; employed; magnified; image; screen; calculated; measurement; conjunction; previously; determined; base; line; supporting surface; field produced; wall thickness; magnetic field; thickness measuring; measuring method; tubular article; housing supporting; releasably secure; magnetically responsive; /33/356/
Citation Formats
Salzer, Leander J, and Bergren, Donald A. Wall thickness measuring method and apparatus. United States: N. p., 1989.
Web.
Salzer, Leander J, & Bergren, Donald A. Wall thickness measuring method and apparatus. United States.
Salzer, Leander J, and Bergren, Donald A. Sun .
"Wall thickness measuring method and apparatus". United States. https://www.osti.gov/servlets/purl/866816.
@article{osti_866816,
title = {Wall thickness measuring method and apparatus},
author = {Salzer, Leander J and Bergren, Donald A},
abstractNote = {An apparatus for measuring the wall thickness of a nonmagnetic article having a housing supporting a magnet and a contiguous supporting surface. 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 said 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 at the selected point is calculated by using a ball surface measurement taken with the comparator in conjunction with a previously determined base line measurement.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}