Patent GB-396757-A (GB)
Title: Improvements relating to circular looms
IPC: D03D37/00
Filed: 1932-02-11
Abstract: 396,757. Circular looms. JALOUSTRE, L. A., 117, Rue St-Lazare, Paris. Feb. 11, 1932, No. 25568/31. [Classes 142 (i) and 142 (ii).] Relates to means, such as described in Specification 285,435, [Class 142 (ii), Looms, Kinds &c.], for stopping relative movement between the warps and shuttles in a circular loom, when the warps break or jam, double latch mechanism being used for this purpose. The invention may be used in looms wherein the shuttles rotate within sheds formed by stationary or rotating warps, but as described below may be used in a loom wherein the shuttles are normally stationary and the warps rotate, the normally stationary shuttles being clutched to and caused to move with the rotating warps on the occurrence of warp breakage &c. Letting-off and guiding warps ; take-up motions. -Intergeared warp beams 13 provided with braking means are carried by a frame driven from a shaft 23 and mounted on a shaft 12, the warps passing through guide holes in a horizontal ring 17, through a circular reed 18 to a circular ring 19 where the beat up occurs. The fabric 20 passes to a take-up device 21 mounted on a rotating frame 22 driven from the shaft 23, the device 21 being driven by worm gearing, change gearing 123 and a stationary rack 124 connected by columns 165 to a normally stationary ring 56. Holding the shuttles stationary normally. The ring 56 carries the bearings of shafts 29 provided with vane wheels 28 engaging recesses in the shuttles, which are held stationary by these means and are guided by rollers 33 mounted on vertical axes in the shuttles engaging an inner race. The ring 56 has an extended base 73 resting in the groove of a rotatable guide member 173 suspended from an outer fixed ring 110 mounted on supports on the loom standards. Rotation of the ring is normally prevented by the engagement with an abutment 174 thereon of a stop 74, on a spring-controlled lever 75, to which it may be pivoted to prevent damage. A ring 64 connected by standards 164 to the rotating frame so as to rotate with the warps &c. is provided with a gear for driving vertical shafts 66 which rotate the vane wheel shafts by bevel gearing. Vertical guide rollers are suspended between the rings 19, 64 from an arm of the member carrying the shafts 66. Clutching the shuttles to the members carrying the rotating warps. If shedding should not take place properly, or a jam be produced by a broken warp, a spring-controlled feeler member 41 on a shuttle is operated and pushes a rod 42 which actuates double latch mechanism 43, 45 whereby a spring-controlled finger 48 is caused to act on one of several abutments on a hoop 53 extending around the loom and connected by a link 58 to latch mechanism for raising from an abutment a latch 60 on a lever 61 pivoted to the ring 56 and connected to a brake band 63 encircling the loom. An adjustable spring 69 connected to a ramp 70 thereupon moves the band into contact with the rotating ring 64, which is thus connected to the ring 56, so that the vane wheels are carried around the loom at the same speed as the warps, the rotation of the vane wheel stops, and the shuttles move with the warps, the lever 61 in the meantime having engaged a projection 175 on the lever 75 and disengaged the stop 74 from the abutment 174. An abutment on one of the columns depending from the normally stationary ring 56 strikes a member of an electric switch for controlling the loom drive, whereby the loom is stopped. The switch can be reset by an upper control lever and the brake band 63 can be reset to declutch the two rings 64, 56 for normal running by pushing a lever into the path of the lever 61. Shedding may be effected by individual dobby or jacquard controlled healds, or by healds working in sections, or for plain weaving by means of discs pressing on the warp threads which pass through a reed permitting free movement of some of the warp threads only, these being thus moved and separated from the others, thus starting a shedding movement which is completed by the shuttle, as described in U.S.A. Specification 1,626,411. The warps may be vibrated and separated by a finger having an extension as described in British Specification 396,756, and the weft spool may be as described in British Specification 396,755. British Specification 396,758 also is referred to.