Fabric analysis; covering wool, worsted, silk, cotton, artificial silk, etc. from fiber to finished fabric by Posselt E. A. (Emanuel Anthony) 1858-1921

Author:Posselt, E. A. (Emanuel Anthony), 1858-1921
Language: eng
Format: epub, pdf
Tags: Textile fabrics
Publisher: Philadelphia, Textile Pub. Co
Published: 1920-03-25T05:00:00+00:00

Each of the five divisions of the lever E-D are divided into

ten parts.

The range of the instrument depends upon the weight of the sHding weight F, and which can be varied when desirable.

Three different weights, viz., SO grains, 100 grains, and 1,000 grains are most frequently used, and the range of the instrument with these different weights is as follows:

Fig, 64

By using the intermediate decimal divisions of spaces on the levers we obtain in the case of the 50 grains weight, an increase of 5 grains for each division; with the 1(X) grains weight, 10 grains for each division, and with the 1,000 grains weight, 100 grains for each division; so that the range is from 50 grains up to 5,000 grains, with difference of not less than 2.5 grains when the 50 grain weight is used, 5 grains when the 100 grain weight is used, and 50 grains when the 1,000 grain weight is used.

At the end of the lever D a graduated scale H is placed, divided into spaces which enable the elasticity of the fibre to be measured in terms of the distance of the two jaws C and / from each other. The generally used arrangement is that if the jaws C and / are separated one tenth of an inch, it will indicate half an inch on the scale H, thus enabling very small ranges of elasticity to be readily seen.

A small stop S, adjusted by a thumb screw at the back of the plate, is inserted in a long slot in the divided plate so as to prevent the lever from falling when the point of fracture is reached.

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