Patent GB-174671-A (GB)
Title: Improvements in or relating to lace braiding machines
IPC: D04C3/38
Filed: 1920-09-20
Abstract: 174,671. Wade, H., (Krenzler, G. [Firm of]). Sept. 20, 1920. Braiding-machines. - Relates to mechanism for controlling the movements of the bobbins in lace braiding machines having the centre plates arranged in an arc of a circle. The bobbins are driven either by the plates themselves or by separate intermittently moved drivers mounted below stationary plates. Vertically-movable guideplates, which fill up the gaps in the track and hold the bobbins in the arrested position on a circular line, are employed in conjunction with means for rotating individual bobbins in a clockwise or counterclockwise direction as determined by the jacquard. In the form shown in Figs. 1 and 3 the centre plates 1 act as drivers. Below each plate 1 a vertically movable guide-plate 4 secured to a sleeve 5 is adjustably mounted on a rod 6 and supported on a spring 7. The bevelled surfaces 8 of the plates 4 complete the circular tracks in which the bobbin-carriers move and ensure that the bobbins do not obstruct the plates 4 when rising under the influence of the springs 7. The lower ends 29<a> of the bobbincarriers may be bevelled to assist this action. The sleeve 5 is provided with projections 9, 10 with which heads or bosses 11, 12 of clutch forks 13, 14 mounted on shafts 28, 25 engage in the position of rest. The forks 13, 14 work within grooves 15, 16 of clutches 17, 18, and when pulled down by a jacquard action cause the clutches 17 or 18 to engage corresponding clutch parts on oppositely rotating gear-wheels 20, 21. Thus the shaft carrying the driver that is in action can be driven in either direction according as it is clutched to the gear 20 or 21. The centre-plate 1 is kept normally stationary by the engagement of a projection 22 carried by the plate 4 with a corresponding recess 23 in a collar 19. When either of the shafts 25, 28 are pulled down, the plate 4 is also pulled down to free the bobbin 29 and leave the centre-plate free to move in the predetermined direction carrying the bobbin with it. When the jacquard releases the rods 25 or 28 the sleeve 5 is also released, and the plate 4 having risen the projection 22 engages below an unrecessed part of the collar 19, thus holding the clutch 17 or 18 in action until the centre plate has turned through a half-revolution. In a modification, the upper collars of the clutches are provided with recesses 15<1>, 16<1>, Fig. 4, and are normally held in place by projections 30, 31 of a bracket 32, which supports the bearings for the gears 20, 21. When one of the clutches is acted on by the jacquard and the corresponding recess 15<1> 16<1> registers with the projection 30 or 31, the clutch can be lowered into engagement with the gear 20 or 21, and is retained in engagement therewith until the recess again registers with the corresponding projection, whereupon the clutch again moves upward under spring pressure, the jacquard pull having meanwhile ceased. In another modification, the projection which engages the recess 23 is mounted on the rod which carries the clutch fork 14. In another construction, the necessary movements are brought about by means of a single sleeve 46, Fig. 6, according as the jacquard pull acts above the pivot of a lever 55 as at 48 or below it as at 47. There is only one fork 49, controlling a double clutch 50 which can be moved up or down to engage gears 20 or 21. An arm 51 engages a notch 53 in the upper end of the lever 55 when the jacquard is not acting on the sleeve 46 and holds the fork 49 and clutch 50 in a neutral position, and an upper arm 58 engaging a notched disc 59 holds the centre disc in neutral position. In a further modification the opposed springs 56. 57, which encircle the rod 46<1> and bear against the sleeve 46, are prevented by stops from moving the sleeve out of the neutral position.