Glass is positioned against preset stops; and glasscutter, which is permanently mounted in carrier support by cutter guide rails, is used to scribe glass at predetermined length. Glass is placed against predetermined groove at opposite end to correspond with setting of cutter carrier support and it is broken on end of cutter base

Coombs, D. S.

English

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uviounsuny .apscrews q, Rubber Pads (4) 
Gtasscutter (Spring-Loaded) 
Modified With One Tooth 
V
ng and Precision Fitted 
rrier 
Cutaway View of Carrier 
Radii on P 
for ( 
Cutter C 
.
May 1974	 B74-10031 
NASA TECH BRIEF 
Langley Research Center
	
A A 
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 National Technical Information 
Service,' Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Office, NASA, Code KT, Washington, D.C. 20546. 
Precision Glasscutter 
Precision Glasscutter 
A precision glasscutter is now being used in the total 
darkness of a NASA Langley Research Center darkroom 
to cut glass photographic plates. Although this glasscutter 
is of comparatively simple construction (see illustration), 
it is very efficient in operation. The glasscutter is being 
used to reduce the length of 4-by 10-inch (10- by 25-cm) 
photographic plates to 5 inches (13 cm), but it could be 
constructed with an adjustable cutter carrier support to 
make cuts of various dimensions. 
Glass to be cut is positioned against the preset stops; 
and the glasscutter, which is permanently mounted in 
the carrier support by cutter guide rails, is used to 
scribe the glass at the predetermined length. The glass 
then is placed against a predetermined groove at the 
opposite end to correspond with the setting of the cutter 
carrier support, and it is broken on the end of the cutter 
base. The cutter mechanism is spring loaded to prevent
Stops at each end of the cutter guide support provide 
preset start and stop positions for cutting. 
Note: 
No further documentation is available. Specific ques-
tions, however, may be directed to: 
Technology Utilization Officer 
Langley Research Center 
Mail Stop 139-A 
Hampton, Virginia 23665 
Reference: B74-10031 
Patent status: 
NASA has decided not to apply for a patent. 
Source: David S. Coombs
Langley Research Center
(LAR-1 1604) .	 a double scribe, and a smooth scribing action is 
provided by bearings mounted on the cutter carrier.
Category 07,08 
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.
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Precision glasscutter

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