电磁线英文资料APPARATUS_FOB_TESTING_ENAMELED_WIRE.pdf

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March 20. 1945
C. B. LEAPE ET AL
2,372,093
APPARAIUS FOR TESTING ENAMELED WIRE
Filed Dec. 3, 1942
4 Sheets-sheet 1
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March 20. 1945.
C. B. LEAPE ET AL
2,372,093
APPARATUS FOR TESTING ENAMELED WTRR
Filed Ded. 3, 1942
4 Sheets-sheet 2
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INVENTORS
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March20,1945.
C. B LEAPE ET AL
2,372,093
APPARAIUS FOR TESTING ENAMELED WIRE
主 Led De,3,1942
4 Sheets-sheet
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http://blog.sina.comcn/iixinlin32134
March 20. 1945
C. B. LEAPE ET AL
2,372093
APPARATUS FOR TESTING ENAMELED WIRE
Fi1 ed Dec.る,1942
4 Sheets-sheet 4
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Patented Mar, 20, 1945
2,372,093
UNITED STATES PATENT OFFICE
APPARATUS FOR TESTING ENAMEALED WIRE
Charles B Leape and Gerald R, Haywood, Forest
Hills, Pa, assignors to Westinghouse Electric
Company, East Pittsburgh
a, a corporation of Pennsylvania
Application December 3, 1342, Seria No 461, 136
15 Claims.(?,737)
This invention relates to apperatus for test
applied and the weight of this load is taken as the
ing enameled wire coatings in order to determi
scrape resistance of the enamel
their physical properties
It has been discovered that scrape values pr
In particular, this Invention is directed to an duced by the use of g manual testing device oi
apparatus for determining the toughness and 6 this kind are quite erratic and not easily dupli-
hardness of applied enamels on conductors
cated, The personal factor is exceedingly high
the like. While the apparatus is most useful
and different individuals running a test secure
determining the properties of enamel coatings on
conductor wires to be employed in electrical
Tor pectedly large variations in scrape values
paratus, it is suitable for determining the physd-10 ample of the erratic and undependable results
ca] propertes of other types of coating composl
with hand-operated scrapers, the following table
tions and organic finishes which may be applied is typical. The wire which was used for thig
to test wire specimens of suitable design for use test was size No 10, 0.037"In diameter, and was
in the
rated 8s& 25 OZ, scrape enamel wire by a con
An important characteristic of an enameled 16 trol laboratory. The testing scraper was g stand
coating is its toughness. The toughness of the
'd type of apparatus employed In the IB
enamel coating greatly determines the extent to. tories of most of the industry.
which the condt
tthe applied coating c
be stretched and deformed or subjected to other
TABLE I
A. Normai rate ofれ
ting from the conductor. Ihere
ccurate determination of the relative toughness Serape
Abraded
Artest
of such coatings is an important factor in selecte
g enamel wire or enamels for any given pu
bose.
side
ut is usually acccpted in the art that the best 20.
single measure of the toughness of enameled c

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