Patent GB-377360-A (GB)
Title: Improvements in or relating to gill-drawing frames or like machines
IPC: D01H5/06
Filed: 1931-05-28
Abstract: 377,360. Gill-boxes. HOLDSWORTH, W., Eudora Street, Providence, Rhode Island, U.S.A. May 28, 1931, No. 15608. Convention date, May 29, 1930. [Class 120 (i).] In a gill drawing frame of the kind wherein one screw 30, Fig. 1, of a pair of co-operating gill-screws 30, 35 is provided at one end with a radially extending faller cam 77, Fig. 5, and the second screw 35 is formed opposite the cam with a reduced shank portion 36 into which the thread groove of the screw is extended, the cam is arranged to carry each faller-bar into centralized position with respect to the second screw so as to lie in the same horizontal plane as the screw axis and so that its end will engage in the thread groove in the shank to start its traverse. The shank 36 of the screw 35 has a diameter less than that of the outer periphery of its thread and greater than that of the root portion of its thread and the thread groove is shaped to engage the sides of a faller-bar immediately the Matter is transferred into centralized position so as to prevent it from rocking or canting. The gill-box, as shown, comprises two opposite sets of faller-bars having intersecting pins and the screw 65 of the upper pair 60, 65 is similarly formed with a reduced shank portion 84. The bearing members 2 for the pairs of gill screws on either side of the machine are formed in two sections 3, 4, Fig. 4, the upper section 4 normally resting against the top face 14 of the lower section which is shouldered at 15 to align the two sections but being arranged to be swung about a hinge 17, Fig. 2, so that the faller-bars may be lifted out of the threads of the screws. The hinge 17 is constituted by ears 18, 19 formed with hubs 20, 21 and a pivot pin 25, lips 28, 29 being provided to engage when the members 3, 4 are swung apart, Fig. 2. The two sections 3, 4 are held together by a long bolt 22 screwed into a tapped hole 24. The lowest screw is driven, e.g. through a bevel gear 33, and drives the other screws through spur gears 40, 41, 68, 62 the gear 40 being secured to the spindle 31 by a pin 42 while the gears 41, 62, 68 are secured on their respective spindles by nuts 44, 63, 69 on the ends of long bolts which extend axially through the screws, the gears being rotatively secured to the screws by studs 46, 64, 71. To accommodate lateral thrust the outer ends of the screws are pocketed in circular recesses 51, 52, 73, 74, white the faller-bar saddles 55, 57, 75, 76 are secured to the end framing as shown in Fig. 4, the upper edge at the left-hand end of the saddles 57 being bevelled very slightly to provide a working clearance for the bars 38. The cams 77, 83 are secured in slots in the screws 30, 60, as described in Specification 225,806, [Class 120 (i), Spinning, Preparation &c. for], while the cams 85, 87 on the screws 35, 65 are of the form described in Specification 295,750, [Class 120 (i), Spinning, Preparation &c. for]. The teeth 95, 96 on the fallers 38, 39 alternate along the length of the bars but during the operative stroke the teeth on one bar are slightly in advance of those on the adjacent opposite bar. To ensure correct resetting of the machine after the upper section 4 has been swung upwardly, Fig. 2, gauge marks 97, 98, Fig. 4, are provided on the members 3, 4 with which the cams 85, 87 are registered before closing the upper section so that the gears 41, 68 are properly set.