Patent GB-306244-A (GB)
Title: Improvements in or relating to bobbin changing mechanism for looms
IPC: D03D45/20
Filed: 1928-01-06
Abstract: 306,244. Stolle, H., Dege, P., and Neumann, E. Jan. 6, 1928. Shuttles, changing bobbins and the like in automatically.-In an overpick or underpick fast or loose reed loom wherein the bobbin transfer hammer 20 is pivoted at 19 at about the level of the upper edge of the shuttle box front wall and is actuated by a member 23 fast to the lay, the hammer head 24 moves in a curved track 25 communicating with the curved lower part 29 of the upwardly-inclined fixed bobbin magazine 27, and extends upwardly in a curved path below the part 29. The lower end of the magazine is situated at such a height above the shuttle box, as to be entirely clear of the picker and picker spindle, which is mounted above the rear wall of the shuttle box. The bobbins 26 during their transfer to the shuttle box ane guided by a spring-controlled flap 34 and by a downward extension 71 of the hammer track. Special weft end controlling devices are employed. Initiation of weft-replenishment; shutter feeler arrangements. When the weft is substantially exhausted, the electromagnet of a weft feeler arrangement causes a pawl 4 of a lever 5 to move into the path of the weft fork hammer 3 whereby through lever mechanism 7, 8, 9, a pin 11 permits a spring-controlled lever 13, 15 to rock on its shaft 14. The arm 15 bears against a pin 16 on a lever member 17 pivoted on an arm 18 of the hammer 20, and this member 17 is moved into a horizontal position in the path of the lay member 23 whereby the hammer is actuated. A tongue 44 acting as a shuttle feeler is pivoted on the lever 13 and is struck by an improperly positioned shuttle whereby the parts 13, &c. are moved into inoperative position and no bobbin change occurs. Bobbin releasing arrangements: weft ends controlling. The closing or locking flap 34 is mounted on a hollow shaft surrounding a shaft 32 a pin on the flap engaging a spring-controlled arm 38 on the shaft 32. When the flap is rocked by the movement of the lowest bobbin in the magazine, the shaft 32 rocks and a pawl 56 on an arm 57 engages behind one of a number of spaced cupshaped weft-end retaining buttons 55, Figs. 2 and 6, on an endless band 39 carried on discs 33. The band, which is tensioned by a roller 53, is thus moved one step each time bobbin transfer occurs. The weft ends 42 extend from the retaining buttons over a guide rail 43, so shaped that before a bobbin is transferred its weft end leaves the guide 43 and thus a loop of slack is provided. A spring-controlled arcuate strip locking member 61 has a locking nose 65, which bears against the second lowest bobbin 26<a> during transfer. When the hammer returns to normal position, its extension 52 strikes the member 61 and withdraws the locking-nose 65 limiting the movement of the transferrer. An adjustable stop comprising a bolt 58 and lock-nut 59 engages the front wall of the shuttle box to limit the movement of the hammer, or the front wall may have an adjustable stop. Shuttle boxes; pickers.-The picker guide spindle 47, Fig. 11, is mounted over the rear wall of the shuttle box, which has a member 51, Fig. 13, for guiding the shuttle, a groove in the member guiding the yarn when threading.