Patent GB-669770-A (GB)
Title: Improvements in or relating to straight bar knitting machines
IPC: D04B11/00
Filed: 1949-05-17
Abstract: 669,770. Knitting-machines. WILDT & CO., Ltd., BARSBY, E. S., and SAUNDERS, A. P. May 8, 1950 [May 17, 1949], No. 13133/50. Class 74 (ii). A housing at each end ot a straight-bar machine having two groups of yarn carriers located, when inactive, at opposite ends thereof, bears a group of movable end stops and is movable aside in relation to the yarn carrier driver bars or rods, whereby any contact-piece associated with a yarn carrier attached to a bar or rod moving to take the carrier out of action, is enabled to pass by the appropriate movable end stop and return into contact with the corresponding fixed home stop. At each end of the machine, the longitudinally movable end stops 9 are borne by a housing 15, Fig. 3, or on a crossslide 67, Fig. 6, movable laterally of the yarn guide driver bars 4, to allow the associated contact-piece 10 of any yarn guide 1 which is going out of action to pass by its end stop 9 and reach its fixed home stop 8. Inside end stops 11 associated with splicing yarn carriers may similarly be moved aside to allow the splicing carriers to pass them and make longer strokes when it is desired to use them like ordinary carriers. The stops 9 are carried on individually longitudinally adjustable slides 24 which may be at the ends of racks 14 sliding in the laterally movable housing 15 and simultaneously adjustable longitudinally by a pinion 20 with which they retain engagement when the housing is moved aside ; or the slides 24 may be adjustable in the cross-slide 67 movable laterally in a longitudinally movable bracket 68. The lateral movement of the housing 15 or slide 67 is effected by cams on the machine control drum and acting through flexible cables. Each stop 9 is so pivoted at 26 that it can be lifted and passed by any contact-piece 10 moving from the home cam as its yarn guide goes into action. Spring- pressed plungers 27 coact with bevels 30 on yarn guide plates 3 to prevent rebound from the stops and so to impart a good selvedge line. Each plate may be provided with two such bevels, each of which will be operated in a single head machine, the opposite sides of the contactpiece 10 then making contact with right-hand and left-hand stops respectively. The step-bystep movement of the groups of end stops 9 towards and away from each other in fashioning, are effected by a right-hand and left-hand threaded shaft 45 racked, through gearing, by a wheel 46, having teeth 46a suitable for racking in either direction, and opposed pawls 50, 51. A member 52, bearing the pawls, is given racking. movements, through bell-crank 54 and linkwork, from the main cam-shaft. The main control drum can act through linkwork 66, 65, 64, to disable one or other or both pawls, by moving a slide 63 having a cam-slot 62a and hence raising or lowering a slide 59 to vary the position of a selector bluff 57 pivoted at 56 on the plate 52 and having a stem 57b slidable in a socket 58. The inside stops 11 are borne by racks 78, 79 interconnected by gear means so as to move longitudinally in opposite directions upon movement being imparted to one rack only. Specification 641,338 is referred to.