GB190704550A - New or Improved Means for and Method of Singeing Threads and Yarns. - Google Patents

Abstract

4550. Gin, G., and Courtecuisse, V. Feb. 25. Heating by electricity.-In the singeing of yarns and threads, the material is passed through one or more split, opened, or divided metallic tubes of platinum, iridium, rhodium, &c., which are heated electrically and may be of any of the sections shown in Figs. 1 and 2; or a number of tubes or channels may be formed side by side by folding a single piece of sheet metal in the manner shown in Fig. 5, the tubes being provided with ears h for connexion to electric terminals. To prevent distortion of the tubes during heating, a number of them are secured at one end to a cross-piece i, Fig. 7, which is fixed in position, while the other ends are secured to a cross-piece n which is free to move either by being suspended from the lower ends of the tubes, which are arranged in a vertical or inclined position, or by being arranged to slide on rods carrying springs p. Fig. 8 shows an electric arrangement whereby the temperature may be regulated &c. The current is passed through a transformer r through a number of groups of tubes arranged in series, the tubes of each group being arranged in parallel, while the current to the transformer is regulated by means of a number of contact-studs and a switch S. When a aingle long tube is employed and the natural access of air to it is insufficient, a stream of air may be directed by a blower into the tube, and the latter may be contracted at the part where the blast enters to compensate for the cooling effect of the air current.