320 (#416) ############################################ WOOLLEN AND WORSTED SPINNING (c) The Schlumberger or Société Alsacienne or Dr. Ball's Top Analyser ; (d) Barker's Extension Tester; (e) Heal's Yarn Examiner ; ( Neate's Extensometer ; and (g) Special apparatus for knitting and weaving yarns to test the qualities and perfections or imperfections. In addition to the foregoing machines, etc., many modifications of these machines and some specially designed machines will certainly be required. Two of the most recently developed testing machines are illustrated in Figs. 95 and 96. In Fig. 95 Barker's Extension Testing machine is illustrated. This machine enables the cloth constructor with accuracy to work back from the finished cloth to the cloth in the loom with certainty in practically all cases saving that of heavily milled goods. Tensions or threads may also be accurately investigated. In Figs. 96 and 97 Neate's Extensometer and its graphs are illustrated. This machine gives the stress- strain diagram for yarns tested a single thread at a time. The characteristic curves for typical yarns as revealed by this machine are exceedingly interesting ; several examples are here given. This equipment should be satisfactorily housed and supplemented by a series of charts of the nomogram type posted up for convenient use. A perfect system of recording should be adopted. Systematic work in the testing laboratory will develop that confidence in the firm's productions which, in the long run, means con- tinued and increasing success in the factory itself. Suitable plans for small laboratories are given in Figs. 98 and 98a. 320
20 22 Textile Machine
24 26 Textile Machine
29 30 Textile Machine
88 91 Textile Machine
140 141 Textile Machine
9 9 Textile Machine
11 12 Textile Machine
14 17 Textile Machine