Patent GB-190814214-A (GB)
Title: Improvements in Change-box Motions of Looms for Weaving.
Inventor: WILLIAMSON WILLIAM
Filed: 1908-07-04
Granted: 1909-07-01
Abstract: 14,214. Williamson, W., and Lloyd, L. July 4. [Cognate Application No. 18,077, A.D. 1908, duted Aug. 28.] Loom change-box motions ; cards ; pattern surfaces.-Two or more pattern-barrel sections, or three barrels E<1>, E<2>, E<3>, Fig. 4, are provided with ratchet-wheels e<1> so that they may be independently turned by pawls g<4>, pattern levers G', G<2>, G<3> being mounted in three sets on a shaft G and having fingers g to register with the holes h in the pattern cards. The cards on the barrels E'. E<2>, E<3> respectively control the pattern levers G<1>, G<2>, G<3>, which are all periodically raised by the transverse member k, Figs. 1 and 4, of a bar K reciprocated vertically by a tappet k<1>. Only one set of pattern levers are, however, allowed to fall with their fingers g into contact with the card on the corresponding barrel, and as the pawls g<4> are carried by three pattern levers, one in each, particular set, this pattern barrel only is rotated. The levers G', G<3> are provided with notched or stepped fingers g<1>, g<2>, g<3> to engage with plates L and hold the pattern levers G<1>, G<3> in a raised and inoperative position. The levers G<2> remain in action until a card having a raised portion H<1> comes beneath them and raises them into inoperative position. This raised portion, if on the right, operates a change lever M<2> provided with a looped wire m<3>, which moves the fingers g', g', g<3> free of the corresponding plate L and allows the pattern levers G<3> and barrel E<3> to come into action. If the raised portion H<1> is on the left, a change lever M is operated, and the pattern levers G<1> are brought into action in a similar manner. Certain of the cards on the barrels E<1>, E<3> have lift-pins h', to operate change levers M', M<3> connected by wires m<4> to auxiliary books or pawls N, N' pivoted to levers n, which are carried on the shaft G and are constantly rocked by the bar K. The pawls N, N' can thus be placed in position to operate the wide ratchet-wheel e<1> or a special ratchet-wheel e<4> on the barrel E<2>, and a fresh card comes beneath the levers G<2> which remain in action until a card with a raised part comes beneath them. When the loom is stopped, all the pawls g<4> are thrown out of action by levers P acting on projections p on the pawls, the levers P being fixed to a rod P<1> operated by lever mechanism p<1>, p<2> from the knock -off handle R. The rear ends of the pattern levers extend underneath three lifting-bars d', one lever from each set of pattern levers co-operating with each lifting-bar. When the holes in the pattern cards allow certain fingers g and their pattern levers to fall sufficiently, corresponding lifting- bars d<2> are raised and, by means of wires d<4>, place the swivelling ends d' of pokers d in the path of a rocking bracket F provided with a knife f. The pokers d, which control the drop-boxes by means of a forked rack C and sliding cam D, are thus operated. In the application to circular boxes, the rear ends of the pattern levers are connected in sets of three to the levers and double-operating cam which govern the hooks controlling the circularbox motion. The pattern barrels &c. E', E', E<3> have the usual octagonal disks e<2> engaged by sliding spring catches e<3>.