Patent GB-386720-A (GB)
Title: Improvements in welt closing mechanism for full fashioned knitting machines
IPC: D04B11/32
Filed: 1931-09-25
Abstract: 386,720. Hosiery-knitting machines. HAINES, J., Meadowbrook, Pennsylvania, U.S.A. Sept. 25, 1931, No. 26823. [Class 74 (ii).] A welt-closing mechanism for a full-fashioned knitting-machine comprises a holder bar to which are secured the welt bars fitted with loop-engaging hooks and which is adapted to be removably attached to a narrowing mechanism, comprised in the machine, to be actuated by the dipping motion thereof to transfer the initial course of fabric loops from the welt bar members back to the needles of the machine, gauges being provided to position the bar on the narrowing mechanism and latches to lock it against displacement when thereon. During the knitting of the welt, the welt bars 45, Fig. IX, which are mounted on a holder 46, are drawn up inclines 49, Fig. I, supported by a front transverse member 50 of the machine frame. The holder 46 is of angular cross section and the flange 46a to which the welt bars 45 are secured is formed with a pair of gauge holes 47 while the other flange 46b has two rectangular apertures 48. On completion of the welt, the holder 46 is removed from the inclines 49 and its flange 46b inserted between the two narrowing comb bars 30, 31 of the usual narrowing mechanism, studs on the lower bar 31 engaging the holes 47 to position the holder preparatory to vertically movable latches 61 secured to a common cross-bar 63 entering the apertures 48 to lock the bar in place. The cross-bar 63 is lowered or raised by turning a handle 66 having a pin engaging a slot in the bar and is locked in either position by a spring-pressed ball in the handle engaging notches in a U-shaped member 67 carrying the handle, the member 67 being mounted on a transverse rod 28 from which depend arms carrying the comb bars 30, 31. Normally, for narrowing the fabric, the narrowing mechanism is lowered twice by a cam 38 on a main cam shaft 19, the cam engaging a roller 37 on a lever 35 pivoted at one end on a stud 36 and connected near its free end by a link 34 to the rod 28. To adapt the narrowing mechanism to turn over the welt, the first lowering is dispensed with by providing an auxiliary cam 80 adjacent the cam 38. This auxiliary cam is engaged by a roller 78, slidable on a stud 77 on an arm 72 loose on the loop regulating shaft 73, when the roller has been displaced along the stud by a hand lever 79, a high part of the cam making the rounded end of the arm 72 engage a collar 74 on a rod 40 to bring a roller 43a on an arm 43 into contact with the lever 35 to prevent it from descending. The cam 38 then acts normally to lower the narrowing mechanism and the latch bars. Grooves 57, Figs. VI and X, in the backs of the hook members 55 of the latch bars 45 engage and close the beards of the needles 13 as the members move down and place the first loops L of the welt over the needles, and latches 56 on the hook members, which extend beyond the ends thereof, close automatically as the members rise clear of the loops. The rod 40 passes through a swivel member 75 on a handlever 39 which may be raised to engage the swivel member with a second collar 76 on the rod and thereby maintain the lever 35 in its raised position. Specification 385,489 is referred to.