Identifier: apparatusforme1919147hart (find matches)
Title: An apparatus for measuring the relative wear of sole leathers and the results obtained with leather from the different parts of a hide.
Year: 1919 (1910s)
Authors: Hart, R.W. Bowker, R.C.
Subjects:
Publisher: National Bureau of Standards
Contributing Library: NIST Research Library
Digitizing Sponsor: NIST Research Library

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Fig. 2.—Wearing test machine as used at present Bureau of Standards Technologic Paper No. 147
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Fig. 3.—A bend marked off jor machine wearing test Wear Resistance of Sole Leather 5 A small suction fan and circular brush were added to the equip-ment in order to remove the dust caused by abrasion. Theseimprovements permitted the wearing conditions to be more uni-formly maintained. m. METHODS Sole leather is generally sold in the form of bends. A bend is ahalf of a hide with the shoulder and belly portions trimmed off,the remaining portion being suitable for soles. In the tests con-ducted samples of leather from different locations on a bend wereused to determine their relative durability or resistance to wear.When a whole bend was tested the general scheme was to divideit into blocks, as illustrated in Fig. 3. Each block was stampedwith a code number, which fixed its location on the bend. Whenusing the clover-leaf-shaped cam for holding the samples, testpieces approximately 24 by 5 cm were required and they wereattached to the cam by a clinching device. Test pieces for usewith t

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