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Title: 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:
 [1];  [1]
  1. Los Alamos, NM
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
866816
Patent Number(s):
US 4798002
Assignee:
United States of America as represented by United States (Washington, DC)
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 = {},
url = {https://www.osti.gov/biblio/866816}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}

Patent:

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