Patent GB-508138-A (GB)
Title: Improvements in processes and machines for ginning cotton
IPC: D01B1/08
Filed: 1938-06-18
Abstract: 508,138. Ginning cotton; lap-forming apparatus. WATSON CENTRIFUGAL COTTON GIN CO. June 18, 1938, No. 18141. Convention date, June 22. 1937. [Class 120 (i)] In a ginning process the lint is repeatedly snatched from the locks of raw cotton while they are subjected to the inertia of the seeds until substantially all the lint is removed from the seeds. The locks are gripped by the lint and a high velocity imparted thereto and the direction of movement of the gripped lint is then abruptly changed so that the lint is snatched from the seeds due to their inertia. The gin comprises a rapidly moving belt 31, Fig. 1, mounted on rollers 25, 26, 27, 32 and provided with teeth 33, inter-engaging sets of straight-toothed saws 55, 56 and 59, 60 and brushes 38, 67. The casing 34 comprises a deflecting plate 39 and a screen 41 forming the base of a suction flue 44, and members 47 .. 51 arranged as shown. Feed screws 46, 52 are provided to collect waste, and a mote board 63 having a turned-up edge 64, a plate 65 and a conduit 70 leading to a condenser are also provided. Cotton passes from the feed hopper 78 through the throat 79 on to the saws 59, 60 and thence to the faster-travelling belt 31 which snatches the lint loose from the seeds. Seeds cleaned of cotton fall through to the saws 55, 56 and thence to the screw 52. Seeds retaining fibre are passed again to the teeth 33. At the top of the path of the belt 31 the fibres are gripped and retained by the teeth 33 while the seeds fly off against the surfaces 39, 41 and return thence to the saws 59, 60. Fine trash is sucked through the screen 41 into the flue 44. Sand &c. is removed by the screw 46: As the belt runs over the roller 26 motes are discharged by centrifugal action on to the board 63. The brush 67 serves to remove the lint to the conduit 70 and discharge the motes by . centrifugal action in front of the plate 71. The teeth 33 may be formed as staples, as separate needles, as the bent ends of pins 80, Fig. 9, or as flat metal points 82, Fig. 10. In other forms the teeth are notched as at 86, Fig. 14, or 88, Fig. 15. Alternatively the belt 31 may be formed of metal and the teeth punched therefrom. Instead of a single belt 31 extending the full width of the machine a number of separate belts may be provided side by side. In a modification, Fig. 2, the saws are enclosed and the cotton fed by a spiked roller 96 from the throat 94 of the feed hopper towards the belt 31. Fans 99, 107 are provided above the roller 26 and opposite the roller 27 the fan 99 being substituted for the brush 38 and the fan 107 directing the lint into the conduit 105. If desired the feed means of Figs. 1 and 2 may be combined as alternatives in one machine e.g. by moving the casing part 48 over to the dotted position, Fig. 1. In another modification the belt 109, Fig. 3, runs over two rollers 26a, 26a and two series of saws 119, 120 are provided. The brush 113 is mounted above a mote board 114 and a condenser 121 is provided the discharge rollers 122, 123 passing the bat of lint between the run of chains 130, 136. The bat is carried forward against the bars 138 and deflected upwardly against the oppositely moving chains 136 by which action a roll is formed. When the roll is sufficiently formed between the sets of chains the drive of the upper chains is interrupted the bars 138 are lowered and the roll discharged on the chains 130. In another modification arcuate guide ribs may be substituted for the saws 119, 120 while in another form saws 152 having ribs there-between are arranged as in Fig. 17, the delinted seeds dropping out between the saws and the edge 157 while the lint is blown off by the air blast through the slot 163. The ginning element may also be constructed as a flat disc.