Patent GB-191413081-A (GB)
Title: Improvements in or relating to Net Making Machines.
IPC: D04G1/00
Filed: 1914-05-27
Granted: 1915-03-18
Abstract: 13,081. Hounsell, Ltd., H. E., [Merchant, S. L.]. May 27. Net-making machines.-Relates to a net-making machine in which the corresponding portions of all the net-forming knots of all rows extend in the same general direction and are on the same side of the net, thus producing a net in which, under a strain in one general direction, the knots tend to draw tighter. The net-forming strands are carried by independent thread - sustaining devices or shuttles, which are all of simitar construction and which are arranged in two series r, s, adapted to move relatively to effect the tying of the knots in related strands, in conjunction with loop-forming means and shedding-mechanism. The two series of shuttles are transferred after each knot-tying operation, and the series r has preferably an odd number of shuttles, and the series s one less, whereby the border cords are tied alternately to the alternate rows of knots. Each shuttle comprises a case 236, Fig. 24, with a circular rear end 237 and a tapering forward end 238, the hook 239 of which engages with a member 171, Fig. 6, of the shuttle-drawing mechanism. The top edge of the case 236 is hooked at 241 for engagement by the bars 117 of the shuttle carriage 112, Fig. 24. The shuttle twine is mounted on a reel 245 and is threaded through a hole near the periphery of a spring tension reel 246. A few turns are wound on the reel 246, and the end passed out through a thread passage in the case 236. At the commencement of the knot-forming operation, the set of shuttles r is secured in position between frames 99, Fig. 6, on longitudinal plates 66, 67 of a carriage 63 by spring pins 71 passing through holes in the shuttle cases. The set of shuttles s rests on a plate 141 secured to the framing of the machine and within stalls formed by frames 144. A beam 209 carrying hooks 213 is advanced,and. the hooks are rotated a quarter revolution to form a loop in the twine u of the shuttle r as shown in Fig. 35. The hooks are then withdrawn while the turning movement is continued, a twisted loop being formed, and the hooks moved laterally to engage the twines t of the shuttles s as shown in Fig. 37. Two-pronged needles 184, Fig. 40, are then thrust up to engage the twines t and carry the loops so formed through the loops u. The shuttle carriage 112, Fig. 6, is brought down on to the shuttles s, and their hooks 241 are engaged by sliding the bars 117, after which the carriage 112 is raised to bring the shuttle s to the position shown in Figs. 6 and 40. The spring pins 71 are then disengaged from the shuttles r, and these are drawn through the loops of twines t by the hooks 171. The needles 184 are then nearly withdrawn, the slack of the twines t being taken up by the tension reels 246 of the shuttle s. The shuttle carriage 112 is then moved to the right to carry the shuttles s above the plates 66, 67, and during this movement, brake pins 254, Fig. 21, are brought against the peripheries of the tension reels of the shuttle s, whereby the retractive action of the springs 247 is prevented for a time, while the reels 246 of the shuttles r are free to act on the twines to draw them tight without upsetting the knots. The hooks 213 are then moved forwards, and the needles 184 are moved downwards to doff the knots. The shuttles s are then moved down into the frames 99 to take up the position previously occupied by the shuttle 2. The machine, Fig. 6, comprises (1) a framework 2 within which is mounted a shaft 17 furnished with a series of cams adapted to operate, through lever and like devices, bars 132 for reciprocating the carriage 112 along horizontal guides 102, (2) members 100 for reciprocating the guides 102 vertically, (3) devices 121 controlling the bars 117, (4) a reciprocating carriage 158 carrying the hooks 171 and separators 167, (5) latches 147 adapted to engage a bar 161 to retract the separators 167 during the raising of the shuttles s, (6) levers 216 for reciprocating the hook beam 209, (7) means for reciprocating the needle beam 183, and (8) means 74, 77, 78, 85, &c. for retracting the spring pins 171. Loosely mounted upon the shaft 17 and driven through reducing-gearing 31, 36, at half the speed of the other cams, are cams adapted to reciprocate horizontally the hook bar 209, needlebar 183, and a rack-bar 210 for rotating the hooks 213. Fig. 45 shows the fabric produced.