Patent GB-190924845-A (GB)
Title: Improvements in Jacquard Pattern Mechanism.
Inventor: SEFTON-JONES HERBERT
IPC: D03C3/24
Filed: 1909-10-28
Granted: 1910-04-14
Abstract: 24,845. Jones, H. Sefton-, [Willey, G. F.]. Oct. 28. Jacquards; pattern surfaces.- Prominences on the pattern surface operate key points 6<a>, Fig. 3, formed on, or otherwise combined with, thin flat keys 6 carried by a shaft 7, Figs. 1 and 3, in a carriage, which is moved to and fro between the pattern surface and the jacquard needles 3. Certain keys 6 are thereby rocked, and their projections 6<b>, which have notched extremities, are raised so as to engage and operate corresponding needles 3 and hooked uprights 2 when the carriage is moved to the right. For each series of keys, there is a corresponding vertical row of needles. The parts 6<b> of the keys are offset vertically and laterally to bring them opposite their corresponding needles 3. The needles are kept in vertical alinement by grooves 6<c> in a board or plate 6d, the needles fitting holes, which are bored in a plate 6<c> and in the plate 6<d> so as to intersect the grooves 6<c>. The plates 6<c>, 6d are mounted on the carriage. The diameter of the needles is a little greater than the width of the grooves 6<c>. Certain keys have vertical extensions 6<h>, which engage grooves in a bar 20 on the carriage and thereby space the keys. Separating blades or strips may also be interposed between the keys. The carriage, which is supported by arms 9, 10, is moved to and fro by means of a locking-bar 17 carrying rolls 16 actuated by grooved cams 15 and fitting in horizontal slots in the end pieces of the carriage. The bar 17 is first moved independently of the carriage, and V-shaped ribs thereon engage V-shaped recesses on the keys, which are thereby locked in their set positions, after which the bar 17 and the carriage are moved together towards the needles. A similar action occurs on the return stroke, so that the keys are disengaged from the locking - bar before they are moved with the carriage, and they are all positively depressed into normal position, where they rest on a bar 21, by an evener bar 22, which is moved downwards by cam - actuated lever mechanism during the stroke of the carriage to the left. The pattern surface, comprising prominences or depressions arranged in successive transverse rows, may be made by casting in a prepared matrix, or in a similar manner to the type bars or stereotype plates of printing-machines. All the keys 6, which may be in one or more horizontal rows, may be actuated by one or by several transverse series or rows of prominences on the pattern surface. The pattern cylinder is driven by worm gearing from a shaft 30 carrying a ratchet-wheel driven by a double pawl, of which one limb is normally kept in gear with the ratchet-wheel by a spring, but the opposite limb may be moved into gear instead by pulling a cord 34, thus allowing the cylinder to be driven in the reverse direction in case of a mispick. The pawl is operated by a cam-actuated lever. The bearings 13 of the pattern-cylinder shaft are carried in adjustable slides; and mechanism is employed for adjusting the upper bearing 40 of the worm shaft either independently of the bearings 13 or at the same time. In a modification, a series of needleworkers 3‹, Fig. 7, carried by wires 3<p> in a second carriage 3<q>, are interposed between the needles 3 and keys 6<o>, which are hooked upon a rail 6<q> in the key carriage 8<p>. Certain keys 6<o> rock the corresponding needle-workers 3<o>, thereby disengaging their hooks 3<r> from downturned projections on the needle ends, but the heavy ends of other needle-workers move their hooks 3<r> into engagement with the needles, which are thereby operated when the carriage 3<q> moves to the left. Bars W, engaged by projections 4<u> on the needle workers, take the strain off the wires 3<p>. The carriage 3<q> is moved to and fro by a bar 3<w>; which has a roll 3<y> operated by a slotted cam-piece 3<v> attached to the lifter-rod 5<a> of the guff, and the carriage 8<p> and an evener bar 22<a> are actuated from a three-armed lever 8<q> operated from a pin 8<t> on the carriage 3<q>. The pattern cylinder is actuated by worm gearing and ratchet mechanism from a link 28<b> adjustable in a slot of the lever 8<q>, to vary the rate of movement of the pattern cylinder. The needleworkers have shoulders 3
, which act on the projections of the needles, when the carriage 3<q> is moved to the right, and positively return the needles endways in case the needles are not returned by their springs.