Testing device, which determines ability of a technician to identify color-coded electric wires, is superior to standard color blindness tests. It tests speed of wire selection, detects partial color blindness, allows rapid testing, and may be administered by a color blind person

Brawner, E. L.

Martin, R.

Pate, W.

English

NASA Technical Reports Server

April 1970
	 Brief 70-10264 
NASA TECH BRIEF 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage commercial 
application. Tech Briefs are available on a subscription basis from the Clearinghouse for Federal Scientific and Technical 
Information, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Division, NASA, Code UT, Washington, D.C. 20546.
--
Color Identification Testing Device 
.
:1
11 5V. 60 Hz
Switch I
Chassis 
Fuse	 I Stepdown 
Transformer  
Indicator Lights	 Indicator Lights7 
Light Green 1 
Brown and White 2 
Gray and White 3 .
	 3 
ugs 
0 ^ (il	 Jacks
Gray
Gray and White

Brown and White

Light Green 
Color Coded
Wires 
Color Code Identification Tester Schematic Diagram 
A plug-and-jack testing device has been constructed 
for determining the ability of a technician to identify 
color-coded electric wires. In this particular applica-
tion, the innovation is superior to standard color 
blindness tests for several reasons: it may be used to 
test speed of wire selection as well as accuracy under 
conditions similar to those encountered on the job; 
it detects certain types of partial color blindness 
often missed by standard tests that produce errors in 
color-code determination; the device allows more
rapid testing and, if necessary, may be administered 
by a color blind person. 
A partial schematic diagram of the circuit is shown 
above. The stepdown transformer provides low volt-
age to the test circuit, diminishing the possibility of 
electrical shock. Each loop of the test circuit contains 
two lamps, a color-coded wire attached to a male 
connector plug, and a female connector jack. The 
jacks are mounted on a panel and labeled with the 
name of the correct color code. The two lamps for 
each circuit are paired, either adjacent to the jacks 
or on a separate panel, which may be placed so that 
the examinee cannot see the results of his selections. 
In use a correct choice will light two adjacent lamps, 
and an incorrect choice will light bulbs in two different 
rows. 
Note: 
Requests for further information may be directed 
to:
Technology Utilization Officer 
Kennedy Space Center 
Kennedy Space Center, Florida 32899 
Reference: TSP70-10264 
Patent status: 
This invention is owned by NASA, and a patent

application has been filed. Royalty-free, nonexclusive

licenses for its commercial use will be granted by

NASA. Inquiries concerning license rights should be

made to NASA, Code GP, Washington, D.C. 20546.

Source: R. Martin, E. Brawner, and W. Pate of

The Bendix Corp.

under contract to

Kennedy Space Center

(KSC- 10278) 
Category 01 
., 
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 Uniteø 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.
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Color identification testing device

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