Patent GB-190121772-A (GB)
Title: Improvements in Rotary or Straight Bar Knitting Machines.
Inventor: ALDRIDGE CHARLES HENRY
Filed: 1901-10-29
Granted: 1902-09-25
Abstract: 21,772. Aldridge, C. H. Oct. 29. Straight - bar knitting-machines. - Relates to machines described in Specifications No. 22,013, A.D. 1899, and No. 54, A.D. 1900. When making a heading or bracelet on the lace work of hose, only a few of the lacing-points C require to be in action, while, when making the repeating-pattern, a much larger number of the lacing-points are required. When making the bracelet, a stop bar D, which is notched or provided with plates screwed on to it at intervals, or is provided with a number of properly-spaced fingers, is turned down so as to press forward certain of the needles, and prevent the lacing-points from taking loops from them. Only those needles opposite notches or spaces in the bar D have their loops removed. When the narrowing machine descends to replace the loops on the predetermined needles, the bar D and the selvage and instep parting stoppers K<2>, K<3>, L<1>, L<2> require to be rocked out of the way ; this is effected by a cam and connecting-rud which rocks a shaft carried by the arm B<1>; this shaft is connected by cranks and connecting-rods with the shafts D<2>, L, K<1>, K. A spring connection enables the shafts D<2>, L, and their bars D, L<1>, L<2> to be turned up to the position shown at D<1> in Fig. 1, whenever necessary. These stoppers may be brought into action by hand or automatically. Instead of using stoppers K' to make plain selvages, N the lacing-points C, Fig. 10, are carried on jacks sliding in tricks in a bar N' and having projections N<10>. Fingers N<9> N<9>, N<11>, N<12>, carried by sliding bars N<5>, N<6> rocked by cranks N<17>, N<18> connecting-rods N<15>, N<16>, and suitable cams act on the projections N<10> and put the selvage points C in or out of action as required to make a plain selvage when fashioning. Springs N<3> hold the jacks in one of their two positions. In the arrangement shown in Fig 12, the fingers are raised and lowered by a pivoted arm 0<1> to produce the same effect. When two top machines, U' for the fashioning-points B<8>, and B<1> for the lacing- points C, are used, brackets U<7>, U<8> on the fashioning-top machine act on the projections N<10> on the jacks N, and raise or lower the selvage lacing- points out of or into action in a similar manner to the fingers N<8>, N<4> &c. In order to select which needles are to have their loops transferred in a lacing-course, a jacquard is used. The bar C<2> carrying the lacing-points, is connected to a bracket F en a slide F<1>, which is pulled by a spring against a second slide F<3> having on its other end a series of steps F<5>, each step being the depth of three needle spaces. Six droppers X, having each three steps X<1>, X<2>, X<3>, of the depth of one needle space, and three pins X<4>, X<5>, X<6>, are acted on by cards G running over a cylinder G'. According to the number and position of the holes in the cards the droppers are raised one, two, or three steps or left alone ; the slide F<3> and by bar C' by means of the steps X<1> &c. and F<5> can be moved into one of eighteen positions. The cylinder is carried on an arm G<2> pivoted at G<3>, and rocked by means of a connecting- rod G<5> and cam. As the arm G<2> falls, a ratchet G<9> acting on the wheel G<11> racks the cylinder round two flats. The bracelet and repeating patterns are produced by two sets of cards strung together so that a bracelet card afternates with a repeating card. When the bracelet is finished, the last card of the bracelet acts on a special dropper, which brings a hook M<2> under the pin G<13> and only allows the cylinder to be racked one flat, thus bringing the repeating-cards into action. Every third &c. instead of alternate cards, may be put into action consecutively. In order to transfer the loops to the right or left, two levers H<1>, H<3> and H<2>, H<4>, with step ends, act on a bowl F<7> on the slide F<1>. According as the end H<1> or H<2> is raised, the ends H<3> or H' or a spring W cause the bar C' to move one needle space to the right or left. The ends H' or H<3> of the levers are raised by bringing the lower end of levers H<5> or H<6> over a pin on a lever rocked by a cam. A special dropper determines which lever H<1> or H<2> is to be raised. A connecting-rod, suitably actuated by cams and levers, withdraws the slide F<3> from the droppers just before selection. A screw J<9>, Fig. 18, moves the bracket F sufficiently to allow the levers H<3>, H<4> to take up their normal position before selection. Sometimes it is desirable that the lacing points should come into action several times in a lace course ; when this is the case, the pattern chain or chains, and the usual stepped wheel which controls the position of the mechanism for shogging the cam shaft, must be stopped. A special dropper acted on by the cards works through suitable levers and rods in such a way as to hold the pawls which rack the pattern chains and stepped wheel out of gear with their ratchet-wheels. There may be two pattern chains, one of which controls the lacing- points in the repeating-pattern and the other has two sets of lugs which control the lacing-points in the bracelet and also the fashioning-courses. The mechanism for shogging the cam shaft is of the usual construction.