Patent GB-189911231-A (GB)
Title: Improvements in or relating to Straight Bar Knitting Machines.
Inventor: BLACKBURN WILLIAM HENRY
Filed: 1899-05-30
Granted: 1900-03-31
Abstract: 11,231. Blackburn, W. H., Houldgate, E., and Davies, J. May 30. Straight-bar knitting- machines.-Relates to means for operating the coverer points used for transferring loops, by which seamless gores or pockets can be formed at any point of the garment simultaneously, if required, with narrowing or' widening near the selvage to produce gussets &c. There are two sets of points for each division. One set is carried by the point bar C, and the other by the bar C<1>. Each set consists of two parts, one of which A<3> is fixed to its point bar and the other A<2> hinged thereto so as to be capable of being turned out of action. Filling-up points D' carried by the part A<2> act when all the coverers are in use, and intermediate filling-up points A<4> are normally held out of action by a latch D' and projection D<3>, Fig. 3, but come into action when the parts A<2> are raised out of action as in Fig. 3. The filling-up points are actuated as described in Specification No. 10,045, A D. 1887. A gore is made by putting one or more widening in, say, two courses, with an interval of four or more needles between the widenings, and, say, one or more plain courses between the widening courses ; when the required fulness is obtained, the process is reversed by narrowing courses and plain courses alternately. To make a gasset simultaneously with the gore, after the widenings are made with the full number of points and the filling-up points D<1>, the parts A<2> of the points are turned up and widenings made with the points on the parts A<3> and the intermediate filling-up points. The parts A<2> are raised by a slotted arm M<5> and rod M<4> on arms M<3> rocked by levers and cams. There are two cams on the main shaft, which is shogged to bring one cam into action and so keep the parts A<2> down ; by a hit-and-miss arrangement controlled by the pattern mechanism, the shogging of the cam shaft, at certain times, also shogs the lever bowl in the opposite direction to the shogging of the shaft, and so brings the other cam into action and raises the parts A' out of action. This cam arrangement also controls the intermediate coverer points. The point bar C or C<1> is connected to a slide I, which has a limited sliding motion on an auxiliary fashioning-box F<1>. A pivoted bar I<2>, with a cam on each end, works between studs I<1> on the slide I ; by rocking the bar P by levers and cams and a hit-andmiss arrangement controlled from the pattern mechanism, the slide I and point bar C' can be shogged three or four needles between the narrowings or widenings in the same or successive courses. The auxiliary fashioning-box is carried by and moves bodily with the ordinary fashioning-box, but may have also an independent motion. This is effected by another screw or by a worm F', Fig. 8, and rack F<5>. The worm is rotated in one direction or the other by a pair of constantly-operated bars or pawls and a ratchet-wheel G. The pawls may be held out of action by a mask or bluff H, or either may be allowed to come into action. The bluff is fast to a long pinion H<1> rocked by a section H<2>, which in turn is rocked by levers and cams controlled from the pattern mechanism. The controlling or pattern chain comprises a broad chain, on which the necessary series of studs are secured in lines at different points in its width ; this chain is used in connection with well-known controlling-devices. The coverer box A<2>, A<3> may be divided at other points than the centre, or have a hinged part at each or either end.