skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Coaxial test fixture

Abstract

An assembly is provided for testing one or more contact material samples in a vacuum environment. The samples are positioned as an inner conductive cylinder assembly which is mounted for reciprocal vertical motion as well as deflection from a vertical axis. An outer conductive cylinder is coaxially positioned around the inner cylinder and test specimen to provide a vacuum enclosure therefor. A power source needed to drive test currents through the test specimens is connected to the bottom of each conductive cylinder, through two specially formed conductive plates. The plates are similar in form, having a plurality of equal resistance current paths connecting the power source to a central connecting ring. The connecting rings are secured to the bottom of the inner conductive assembly and the outer cylinder, respectively. A hydraulic actuator is also connected to the bottom of the inner conductor assembly to adjust the pressure applied to the test specimens during testing. The test assembly controls magnetic forces such that the current distribution through the test samples is symmetrical and that contact pressure is not reduced or otherwise disturbed.

Inventors:
 [1]
  1. (Palos Park, IL)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
865859
Patent Number(s):
US 4590423
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
coaxial; fixture; assembly; provided; testing; contact; material; samples; vacuum; environment; positioned; inner; conductive; cylinder; mounted; reciprocal; vertical; motion; deflection; axis; outer; coaxially; specimen; provide; enclosure; power; source; drive; currents; specimens; connected; bottom; specially; formed; plates; similar; form; plurality; equal; resistance; current; paths; connecting; central; rings; secured; respectively; hydraulic; actuator; conductor; adjust; pressure; applied; controls; magnetic; forces; distribution; symmetrical; reduced; otherwise; disturbed; outer conductive; outer cylinder; inner conductive; magnetic force; current paths; magnetic forces; inner cylinder; vertical axis; power source; inner conductor; contact pressure; material sample; pressure applied; vacuum environment; conductive plates; vacuum enclosure; conductive cylinder; coaxially positioned; current path; material samples; conductive plate; current distribution; hydraulic actuator; coaxially position; contact material; /324/

Citation Formats

Praeg, Walter F. Coaxial test fixture. United States: N. p., 1986. Web.
Praeg, Walter F. Coaxial test fixture. United States.
Praeg, Walter F. Wed . "Coaxial test fixture". United States. https://www.osti.gov/servlets/purl/865859.
@article{osti_865859,
title = {Coaxial test fixture},
author = {Praeg, Walter F.},
abstractNote = {An assembly is provided for testing one or more contact material samples in a vacuum environment. The samples are positioned as an inner conductive cylinder assembly which is mounted for reciprocal vertical motion as well as deflection from a vertical axis. An outer conductive cylinder is coaxially positioned around the inner cylinder and test specimen to provide a vacuum enclosure therefor. A power source needed to drive test currents through the test specimens is connected to the bottom of each conductive cylinder, through two specially formed conductive plates. The plates are similar in form, having a plurality of equal resistance current paths connecting the power source to a central connecting ring. The connecting rings are secured to the bottom of the inner conductive assembly and the outer cylinder, respectively. A hydraulic actuator is also connected to the bottom of the inner conductor assembly to adjust the pressure applied to the test specimens during testing. The test assembly controls magnetic forces such that the current distribution through the test samples is symmetrical and that contact pressure is not reduced or otherwise disturbed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}

Patent:

Save / Share: