Patent GB-190420393-A (GB)
Title: Improvements in Rotary or Straight-bar Knitting Machines.
Inventor: ALDRIDGE CHARLES HENRY
Filed: 1904-09-21
Granted: 1905-09-14
Abstract: 20,393. Aldridge, C. H. Sept, 21. Straight-bar knitting-machines.- Relates to improvements in the Cotton's type or other rotary machine for producing vertical embroidery stripes &c. in combination with openwork, ribs, or plain fabric. The carrier rods A-A<3>, Fig. 3, (preferably four), are conveniently placed close in front of the fashioning finger-rods and slide, without turning in brackets which can be rocked about their pivots by arms A<9> and links A<10> and can be swung about a centre A<5> by bell cranks A<7> and connecting - r o d s A<8>. Each carrier rod has a number of thread-carriers which all work in one plane. Any carrier blade, by being slid or rocked on the bracket attaching it to the carrier rod, can be put into or out of action during fashioning, and the remaining carriers can slide over the inactive carriers and work with needles normally fed by the latter. At each embroidery course, the carrier rods such as A<2>, Fig. 1, can each receive a separate variable endways movement determined by the position and depth of suitable dogs B<5>, B<6> or other acting- surfaces on a ratchet-driven pattern wheel B<3>, It is generally necessary during the working of an embroidery course to add to or subtract from the principal movement, other movements varying from a half to several needle spaces. These extra movements are imparted by the longitudinal motion of a stepped slide C interposed between the stud-actuated lever B<7> and the carrier-shogging lever C<2>, an elbow C' of which rests on the former. The slide C is itself moved by one or other of tuds D<8>, D<9>, which work in slots in the connecting-piece C<10> and are moved suitable amounts simultaneous in opposite directions by bell cranks D<2>, D<4> and links D<7>, D<6>. The slots in the piece C<10> are shaped so that, in the elevated position of the latter, the stud D<8> moves it to the left a variable amount and the rod A<2> to the right a corresponding amount, while the stud D<9> slides in the horizontal part of its slot. The piece C<10> can be kept up by an engaging arm E capable of bearing on studs at the sides of pattern dogs B<5>. If there is no side stud to hold up the arm E, the piece C<10> falls by its own weight and the stud D<8> moves idly. while the stud D<9>, by engaging with the top part of its slot, moves the slide C to the right and allows a spring to move the rod A<2> a corresponding amount to the left. A single endways movement of the slide C will suffice to impart the requisite extra movements to the carrier rods if the arm C<2> is provided with a jointed piece having an end F<2>, Fige. 10 and 11, arranged to work on a rising series of steps at the side of or behind the inclines F supporting the arm C'. An auxiliary bell crank F<6>, F<7> pivoted to the jointed arm F<2> engages, if supported by the pattern stud E<3>, a lug F<S> on the arm C<2> and holds the piece F<2> rigid with respect to the latter. If the slide C is then moved, the whole linkage will be lifted by the rising incline F<1>. If, however, there is no pattern stud on the side of the dog B<5>, the top end F<6> of the bell crank misses the lug F<8> and the piece F<2> is free to rock on the arm C<2>. If the slide C is then moved, the falling inclines F lower the arm C<2>, the piece F<2> moving idly on its inclines. If no extra movements are to be given to the carrier during the working of a course, the stud E<3>, Figs. 1 and 10, is replaced by a similar stud placed at the back of the dog B<5>. This stud supports a depending portion of the arm C<2>, which is then uninfluenced by the movement of the slide C. It is possible by suitably stepping the dogs B<5>, B<6> to impart an extra lift or fall to the lever B' and to add to or subtract from the movement normally imparted by the slide C to the threadcarriers. The dogs B<5> &c. on the wheel B<3> can be employed for producing the heading of a vertical stripe of embroidery, the even-numbered dogs B<6> producing the repeating part of the pattern. To bring the dogs B<5> successively into action, the wheel B<3> is racked two teeth at a time by a clawker B<10>. If it is required to rack the wheel B<3> one tooth only, e.g., in order to bring the series B<6> into action, the clawker B<10> is lifted partly out of engagement by a pin G<4> on a lever G, which can be rocked for the purpose by removable studs G<3> on the wheels B<3>. As an alternative, the lever G can be controlled through the link G<9> by a pattern chain which is also the means of shogging the cam-trucks used in this type of machine. The lateral shifting of the carrier rods for embroidery courses can be effected by jacquard mechanism which inserts droppers J, Fig. 13, between a pile of three slides L (shown in plan) and thrust rods H-B3 corresponding to and communicating with the carrier rods. The auxiliary movements of the latter required in working an embroidery course, are supplied by a compound stepped wheel which advances the three slides L in regular order. After each advance, or selection, the thrust rods H-H<3> are brought back against the droppers by springs, extended for the purpose by a bell crank and link. The odd and the even numbered cards can be arranged, like the studs B<5>, B<6>, Fig. 1, to produce the heading and the repeating pattern respectively. To change from one to the other, the last card of the one series causes a forked lever to arrest the bell-crank arm which racks the jacquard cylinder, and so to bring the card following, and not the next but one, uppermost.