Patent GB-761653-A (GB)
Title: Shuttle-loading device for automatic looms for weaving
IPC: D03D45/20
Filed: 1952-07-04
Abstract: 761,653. Automatic cop changing in looms. SOC. COLL. A. GARDELLA & F. LLO. July 4, 1952 [April 10, 1952], No. 16840/52. Class 142 (2). In a jute loom using solid cops that shorten as they are consumed, the remnant of a depleted cop is extracted at one end of the loom and the weft is cut, leaving sufficient for one pick still threaded through the shuttle, which therefore arrives empty at the other end of the loom (where the cop feeler and cop inserter are situated), enabling the weft to be replenished without a missing or incomplete pick and without interrupting weaving. Cop feeler. A springy arm 10, Fig. 11, is held against the back 5a of the shuttle by an un-exhausted cop so that a feeler 4, Fig. 17, can enter the shuttle freely at beat up. When the last few coils of the cop collapse, the arm 10 springs against the front of the shuttle, where it is locked by a latch 16 rising behind a boss 10a ; the feeler 4 is then pushed forward by the arm 10 to disengage it from a notch 12 in a rod 13, which moves endwise to initiate weft replenishment. Cop extraction. The extractor 7, Fig. 11, is slidable in a bearing 21 and is normally held retracted from the position shown by a spring 22, and is held parallel with the breast beam 2 by a stop 23 resting against a vertical lever 24. When the lever is moved to the right by the rod 13, the extractor swings towards the approaching slay 1 (as shown) under the influence of the spring 22 ; as the slay beats up, a dog (not shown), positioned by the lever 24, strikes a dagger on the slay to turn a vertical lever 30, which projects the extractor 7 so that its point 107 impales the remnant 106 of the cop, the extractor being kept projected by a tooth 48 springing out and abutting the end of the bearing 21 ; as the slay recedes, a striker 37 flicks the extractor clockwise about its pivot 121. As a result, the cop remnant 106 is pulled from the shuttle and taken to a bin 9, the point 107 of the extractor passing between the prongs of a fork 50 ; the tooth 48 encounters a stop 49 which presses it inwards to enter the bearing 21 ; a lug 221 returns the lever 24 and rod 13 to their normal positions ; and, when the striker 37 rides past the end 307 of the extractor, the spring 22 turns the extractor anticlockwise until it becomes parallel with the breast beam and retracts it into the bearing - 21, whereby the point 107 is withdrawn from the fork 50 to drop the cop remnant into the bin 9. A lever 38 on a shaft 39 extending to the other end of the loom was also pushed forward by the clockwise movement of the extractor to set the cop inserting mechanism in operation. Cutting weft. The striker (not shown) that operated the lever 30, Fig. 11, also pushes a member 27, Fig. 14, to depress a rod 33 to open scissors 8; as the slay recedes after extraction of the cop remnant, the scissors are closed to cut the weft by a ramp 332 on a lever 32 riding under a stop 36, which is fixed on the loom frame is such a position that the weft is cut long enough to reach across the fabric. Preventing repeated cop insertion. To prevent a second release of the rod 13 by the feeler 4, Fig. 17, from causing the cop inserter to act twice during the same replenishing operation, a pin 154 depending from a lever 54 normally penetrates the bearing 3 of a sliding rod 250 forming part of the cop inserting mechanism, the rod 250 having a recess to receive the pin; when the rod 250 moves during replenishing, the pin 154 rides out of the recess, causing the other end of the lever 54 to enter a notch 151 in a bar 51 carried by the rod 13, which has meanwhile returned to its normal position after moving to initiate replenishment.