Capillary tube wire holder provides a mount for fine wires for photomicrographs. The holder is mounted in a stainless steel tube and cast in a transparent casting material. It protects and permits easy location of the wire

Raphael, H. A.

English

NASA Technical Reports Server

July 1966
	
Brief 66-10329 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U. S. space 
program and to encourage their commercial application. Copies are available to the public from 
the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Inspection of Fine Wires Simplified by Capillary Tube Wire Holder 
tAi	 of Wire Made) VOL
Wire 
Stainless Steel Tubing 
Transparent Molding Material 
The problem: 
To design a mount to hold fine wire (.0005 inch 
diameter) for photomicrographs. The mount must 
protect the wire from damage and permit easy lo-
cation of the specimen. Formerly the fine wire was 
cast in a solid block which tended to damage the 
specimen.
The solution: 
A capillary tube wire holder mounted within a 
stainless steel tube and cast in a transparent casting 
material. 
How it's done: 
A .030 inch x 3/4 inch capillary tube is mounted 
within a /8 inch x 3/4 inch stainless steel tube. Wires 
(continued overleaf) 
This document was prepared under the sponsorship of the National 	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States 	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States 	 will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19660000328 2020-03-11T17:40:14+00:00Z
strung through eight .040 inch holes (four at the 
top end and four at the bottom) drilled in the stain-
less steel tube suspend the capillary along the axis of 
the larger tube. The fine wire specimen is inserted 
in the capillary tube and the whole construction is 
cast within a transparent casting material. 
Notes: 
1. Using this technique, four .0005 inch diameter 
specimens were successfully polished and their 
metallographic structure determined. 
2. Inquiries concerning this invention may be di-
rected to: 
Technology Utilization Officer 
Manned Spacecraft Center 
Houston, Texas 77058 
Reference: B66-10329
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be made 
.to NASA, Code 
GP, Washington, D.C. 20546. 
Source: H. A. Raphael

of North American Aviation, Inc.

under contract to

Manned Spacecraft Center

(MSC-358) 
Brief 66-10329	 Category 05


Inspection of fine wires simplified by capillary tube wire holder

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