GB718103A - Control of healds in a circular loom - Google Patents

Abstract

718,103. Circular loom shedding mechanism. QUALITEX-SOC. DUNOD & CIE. July 27, 1951 [July 27, 1950], No. 17818/51. Class 142(2) Groups of healds 43, Fig. 2, are attached to sliders 42 disposed in two layers around the central shaft 67 of the loom and are drawn inwards periodically by two cams 40 of identical profile acting on rollers 40a on the sliders; lubricant is circulated through a pipe 54a and channels 55, 162 by an electrically - driven pump 52. Outward movement of the healds is effected by springs 58, Fig. 4, housed in concentric cylinders 56, 57, to the inner of which the healds are attached. When the healds arrive at their innermost position, they are locked by a plunger 59 entering a hole in the inner cylinder 57; half the plungers are subsequently retracted by solenoids 65 energized under the control of an endless pattern strip by brushes completing circuits through perforations in the strip there being twice as many brushes as there are shuttles; a rotary distributer switch between the brushes and the magnets causes the magnets to operate in succession to produce a travelling shed for each shuttle. The cylinder 57 may be locked by balls 124, Fig. 5, wedged into a groove in the cylinder by a cone 125 withdrawable by an electromagnet.