Patent GB-191114423-A (GB)
Title: Improved Cop Changing Mechanism for Looms.
Inventor: BRIOT ALBERT
IPC: D03D45/20
Filed: 1911-06-17
Granted: 1912-05-09
Abstract: 14,423. Briot, A. July 26, 1910, [Convention date]. Shuttles, changing bobbins and like in, automatically; shuttles, positioning for weftreplenishing. - Relates to cop - changing mechanism of the type described in Specifications 13,831 / 04 a n d 3758/07, and comprises improvements in the arrangements for (1) holding the cop in the feeder, (2) ejecting the cop, (3) ensuring rigidity of the feeder when the shuttle is in correct position for the change, and (4) stopping the loom if the weft breaks or the shuttle is not threaded immediately after the copchanging occurs. The feeder comprises a spindle 6, Figs. 2 and 4, provided with arms 7, 7<1>, 7<2>, supporting a rod 8, on which are pivoted the arms 9, 10 of the copcarrier. When the feeder is lowered from the position .shown in Fig. 4 to the position shown in plan in Fig. 2, in order to insert a cop into the shuttle, spring-actuated pins 4 prevent the cops from falling from the magazine, and a dog 20 pivoted within a groove in the arm 9, having been released from an adjustable part 25, is caused by a spring 59 to engage or hook the cop point, the cop 18 being moved endways so that a groove in the head thereof engages a spur 22 fixed to the arm 10 of the cop-carrier. This spur fits'in a longitudinal groove in a finger 24, which is pivoted to the spur and is recessed circularly to receive the head or heel of the cop 18 from the magazine. A lever 13 pivoted on. a sleeve 14 on the arm 9 is connected by a spring 12 to the sleeve, and fits within a slot 17 in the shaft 6. A knee joint is formed by the parts 9, 10 and 13, 7, 7<1>, the amount of opening of which under the action of the spring is limited by a stop 15 on the lever 13 abutting against a stop 16 on the arm 9. A coiled spring 17<1> normally moves the cop-carrier 9, 10 to the left into contact with the arms 7, 7<1>. When the weft-fork mechanism is actuated, a shaft 26 is rocked, as described below, and, by means of an arm 27, a chain 28 connected to a part 28' on the shaft 6 is slackened, thereby allowing a spring 53 to rotate the shaft 6 and lower the cop feeder. If the shuttle is correctly positioned when the lay beats up, a finger 11<1> on the copcarrier engages an incline 51 in the shuttle, whereby the cop-carrier is moved to the right and a finger 55 on the arm 10 slides underneath a member 56 on the spindle 6, so that the feeder is held rigid. The cop-spindle heads are provided with rings to fit grooves in tongs in the shuttle, stops 49, 50 in these tongs preventing longitudinal movement of the cop spindle. During the cop-changing, the head of the cop 18 in the carrier first engages the head of the cop spindle 57 in the shuttle and thus releases it from the grooves in the tongs. The finger 24 then engages an inclined guard 48 in the shuttle, being thereby rocked so as to push the head of the cop 18 to release it from the spur 22. The rings of the two cops then come into contact and the spindle 57 is expelled, the dog 20 having been rocked to release the cop by coming into contact with a striking-cheek 58. The dog 20 then engages the bend of the spring 59, from which it is released, when it returns to the magazine, by the part 25, but this part maintains it in its open position, so that the carrier may receive a cop from the magazine. If the shuttle has entered too far into its box, it is pushed back along with the carrier, so that the parts 55, 56 may engage, by a lever 60 operated by an adjustable member 61 on the shaft 6. If the shuttle is otherwise incorrectly positioned, the finger 11<1> engages it and the feeder gives way, no cop-transfer occurring and the weftstop-motion subsequently stopping the loom. In a modification, in order to lock the feeder when the shuttle is correctly positioned, the arm 10 is provided with a heel, which, when the copcarrier has been caused to slide, comes over an adjustable arm fixed to the frame. The weft fork is carried by a rod 34, Fig. 10, which is slidable in a support 33 against spring action, and is provided with a support 35 carrying a pin 37 on which a pawl 32 and a toothed sector 38 are independently pivoted. Normally, the pawl 32 is held in position opposite the notch 31 of an arm 30 on the shaft 26 by means of a projection 41 resting on the sector 38, so that the shaft 26 is rocked and the cop-changing mechanism is operated when the weft-fork mechanism is actuated.