Discussion of the method of determining twist in single yarns by the method of untwisting and retwisting to the same twist in the opposite direction, and description of an instrument, to be used with a twist counter, which indicates the end-point by measuring length. The instru ment consists of a pendulum operating in conjunction with a photronic cell, and the end-point is signaled by a buzzer. Such twist determinations become semi-automatic when done on a motor-driven twist counter.
Get full access to this article
View all access options for this article.
References
1.
A. S. T. M. Standards on Textile Materials, 1938.
2.
E.R. Schwarz .Introduction to Micro-Analysis of Yarn Twist . J. T. I., 24, T105, 1933.
3.
J.T. Killian and E.R. Schwarz.Note on Application of Twist Formulae . J. T. I., 27, T237, 1936.
4.
E.R. Schwarz .Twist Measurements in Single Yarns. Text. Rsch., 8, 157, 1938.
5.
* Measurements made in M. I. T. Textile Laboratory by H. Hindman and E. R. Kaswell.
