Patent GB-189807949-A (GB)
Title: Improvements in Rotary or Flat-bar Knitting Machines.
Inventor: ALDRIDGE CHARLES HENRY
Filed: 1898-04-02
Granted: 1899-02-11
Abstract: 7949. Aldridge, C. H. April 2. Straight-bar knitting-machines.-To widen at one or both selvages without using the points and without losing a course, the thread-carrier rods can be moved, without shogging the cam shaft, by means of a special cam A<3> on to which is shogged by a handle B<11> a truck B<9> on the ordinary arms B which carry the ratchet pawl arms B<6>, B'. Each arm B has a slide B<13>, and when this is moved outwards it projects over a rod C. The rods C at each end are connected by a bar C<3> moved by the draw-bar in such a way that the bars B are alternately supported and not allowed to follow the cam A<3>, or released and allowed to follow the cam, so that the right and left selvages may be alternately widened. One bar B can be held up continuously when widening at one selvage only. In order to make a good selvage when the widening takes place, the thread should be clear of the sinker, so that it may come up at the outside of the new needle and so be passed round it ; for this purpose a special motion is given to the catch-bar or pressing-trucks by a special cam, but this motion must only be given when the thread carrier is at the widening selvage. E<5>, E<6>, Fig. 4, are the ordinary cams, and E<7> the special cam. The truck is shogged at the required time by a fork E<2> on a bar E which is moved by levers F<8>, F<10> and forked lever F<5>, Fig. 5, which last is operated by a cam F rotated by a ratchet F<1> and pawl F<2>. By means of a lever G operated by hand or from the pattern chain the pawl may be held out of action, so that the cam E<7> can be made to come into action at either selvage as required. The rod E may be traversed by the draw-bar though a rocking lever and slide which, according as it is set, will allow the rod to move in the same or opposite direction to the draw-bar. In widening by the ordinary process with points, the usual catches K<1>, K', pivoted to the slide stops, engage the carrier rods K, K and draw them out when the slide stops are racked outwards ; these catches are lifted by a suitable incline K' on a bar attached to the show boxes ; these catches are also used to regulate the lead of the thread-carriers. When the stops are racked out to the greatest width the inclines K<7> do not allow the catches to come into action during the widening of the widest width ; to obviate this difficulty and to provide for the cases in which it is desirable that the catches should not be used to regulate the lead of the thread-carriers, a slide L' with a projecting bar L<3> to act on projections K<4> on the catches K' is provided. When the catch K' is raised it raises K<1> by the pin K<3>. The bar K<5>, on which is the projection K', is pivoted and rests on a bracket L<4>, and when the fashioning- machine goes down the bar K<5> also goes down, and the projection K' is out of range of the catches. In order to make two rows of fashionings at a distance of a few needles, the fashioning-screw is made so as to have play in its bearings, and is made to traverse by face or other cams and spring.