Patent GB-190106926-A (GB)
Title: Improvements in Weft Replenishing Mechanism for Looms.
Inventor: BAKER WILLIAM HENRY
Filed: 1901-04-02
Granted: 1901-08-17
Abstract: 6926. Baker, W. H., and Kip, F. E. April 2. L o o m shuttles, changing bobbins in, automatically. - A series of bobbin cases r, each containing a full weft bobbin, are held by spring clips q in a rotary magazine l, which is mounted upon a spindle j above the shuttle box m. In the machine shown in Fig. 2, there are twelve bobbin cases, made up of four sets of cases for weft of as many different colours, e.g., red, white, blue, and green. The shuttle box is connected to an arm w, secured to a rocking-shaft v, which carries a cam y, having four radial flanges R, W, B, G, corresponding to the four colours above mentioned. This cam is set so that the flange, corresponding to the colour of the weft in use, is horizontal. Each of the flanges is formed with a recess adapted to engage with one of four bars 1, which are forced towards the cam by springs 2, and serve to control the rotation of the magazine l so as to cause the set of weft bobbins of the proper colour to be brought above the shuttle, ready for transference thereto. The magazine is connected by means of a volute spring 5 to a sheave 4, Fig. 4, mounted loosely upon a sleeve n, forming part of the magazine, and this sheave is driven by means of a cord 6, until the tension of the spring 5 overcomes the driving friction, when the cord slips. The magazine is normally held in position, the cord meanwhile slipping, by a detent 8, but, as soon as this detent is released, the magazine is rotated by the action of the spring until it is stopped by the engagement of one of four detents 10, Fig. 5, with the upper end of one of the four bars 1; these detents, one for each colour of weft, are fitted, at angular distances of 90‹, in circumferential grooves formed in a drum 9, secured to the sleeve n. Assuming that it becomes necessary to change from white weft, which is shown in use in Fig. 2, to weft of another colour, e.g., green, the shuttle-box motion brings the green-weft shuttle in line with the raceway, and at the same time causes the cam y to oscillate so as to press back all the bars 1, except that corresponding to the green, which is forced against the drum 9, and releases the detent 8. The drum and magazine then rotate until the operative bar 1 strikes its corresponding detent, and so causes the magazine to stop with the first bobbin case of the green series beneath a pivoted lever t, which then forces the bobbin case into the shuttle and displaces a previously-exhausted bobbin case. Assuming now that it becomes necessary to change again from green to white weft, the shuttle-box motion actuates the mechanism in the manner already described, so as to bring the first of the white bobbin cases above the shuttle, and, as this first case may be empty, the magazine is provided with means for ensuring its rotation until the first full case comes over the shuttle. These means comprise, for each detent 10, a spring-controlled detector or sliding rod 16, connected by a link 15 and crank 14 to a shaft 13, mounted within the magazine ; this shaft is connected by the crank 19 and link 18 to the corresponding detent 10, which is pivoted to its guideway. When there is no bobbin in the case, the detector 16 is pressed outwards by its spring, and causes the corresponding detent 10 to be turned into an inoperative position. The weft-supplying mechanism is controlled by electric means, which may be similar to those described in Specification No. 14,153, A.D. 1900. The lever t carries an arm t<1>, to which is pivoted the armature 20 of an electromagnet 21 ; when the magnet is excited, the armature is drawn into the path of a striker 22 on the lay, so that, when the lay beats up, the lever t is forced down against the bobbin case. The closing of the electromagnetic circuit, which includes the magnet 21 and shuttle box, is effected by means of a spring lever attached to the bobbin case and normally held out of electric contact by the weft which passes over the lever. The bobbin cases are metallic, and each is formed in two sections electrically insulated from each other ; when in the shuttle, a case is held by metal spring plates fitted to the ends of the shuttle and engaging with the ends of the case.