GB374741A - Improvements in or relating to looms for weaving - Google Patents

Abstract

374,741. Electric looms. JASICEK, A., 16, Meytensgasse, Vienna, and POLNAUER, F., 20, Kurfiirstenstrasse, Berlin. Sept. 30, 1931, No. 27217. [Classes 142 (i), 142 (ii), and 142 (iii).] Driving arrangements; picking motions; stop-motions, shuttle; checking shuttles; changebox motions; circular looms; shuttleless looms; reeds.-The shuttle or other thread inserter of a circular or other loom is made of or has a part made of non-magnetizable material and is propelled by a travelling magnetic field through a stationary magnet system. As shown in Fig. I and diagrammatically in Fig. 10, a magnet system I, II is arranged at each side of the loom only and is energized by current from the three-phase supply Q under the control of a switch b rotated from the loom main shaft W which is driven by belts D, C from a motor B. The switch sections 1, 2 cause the magnet I to be energized to throw the shuttle S and then the sections 5, 6 cause the magnet II to be energized to check the shuttle. The sections 7, 8 and 3, 4 act similarly on the return throw of the shuttle. While the shuttle is in the shed, current is supplied to the main motor B through the switch sections 9, 11 or 13, 15, and when the shuttle is in a box, through the sections 10, 12 or 14, 16 and a switch N. Should the shuttle not box, the switch N is left so that the current passes to a brake IV instead of the motor B and the loom is stopped. Fig. 4 shows a magnet system with upper and lower magnets E<1>, E<2> spaced apart for the passage of the fin f of the shuttle S ; Fig. 16 shows only one magnet E and a parallel iron bar 101 encircled by a part 103 of the shuttle, while in Fig. 18 the bar 101 is replaced by two separated iron bars 108, 109 and the shuttle fin 110 is T-shaped; other arrangements are shown in Figs. 27 and 29. The pole pitch of the magnets may decrease towards the outer ends of the shuttle stroke as shown in Fig. 11. In changebox looms several bars 44, 45, 46, Fig. 31, corresponding to the bar 101, one for each shuttle compartment, can be brought between or against the fixed magnets E<1>, or the bars 108, 109, Fig. 37, may be divided longitudinally to allow the passage of a round pin 110 carrying the fin 111 when the box 54 is rotated, or the fins 119, Fig. 39, of the shuttles S may come between the fixed magnet E and the iron body 54 of the change-box. When the magnet system is continuous, as in a circular loom, the reed teeth Ka, Fig. 47, may be bent to form a groove Kr for the passage of the shuttle fin f, or they may be divided as shown at 57, 58, Fig. 51.