Patent GB-195642-A (GB)
Title: Improvements in shuttle-changing mechanisms for looms
IPC: D03D45/34
Filed: 1923-03-29
Abstract: 195,642. Naamlooze Vennootschap Exploitatie Maatschappij voor Textielindustrie Auerbach & Co. March 31, 1922, [Convention date]. Shuttle-changing mechanism; checking pickers and shuttles.-Relates to shuttle-changing mechanism of the type wherein the rear wall of the shuttle-box is swung inwards to oject the spent shuttle, and the fresh shuttle enters under the raised front wall. Such mechanism is actuated either when weft failure occurs by the weft fork, or by weft-feeler mechanism when the pirn is substantially exhausted, a shaft 56, Figs. 2 and 8, being in both cases turned. A hook 18 is thereby depressed into the path of a pin 17 on a locking-arm 16 on a lever 12 carrying the front wall 11. When the lay moves back, the front wall is thus raised against the action of a spring on the shaft carrying the lever 12. The pin 17 has a thickened part 19 normally engaging the part 9 of a locking-device 9, 10 fixed to a hollow spring- controlled shaft 8 connected by an arm 7 and spring-controlled plunger 6 to the shuttle-box rear wall 3. When the arm 16 is actuated and the lay is back, the pin 17 leaves the part 9 and engages a part 10 concentric with the shaft 8, whereby the front wall is locked in its raised position whilst the shaft 8 is released and is rotated by its spring, thus causing the rear wall 11 to be moved inwards to deflect the incoming spent shuttle from the shuttle-box. The spent shuttle may leave the shuttle box at once, or, as shown, may be held temporarily between the rear wall and a resilient checking-tongue or swell 22 connected at its inner end to a lug 57 on the rear wall and at its outer end by a rod 23 to an arm 24 on a spring-controlled shaft 25, which passes through the hollow shafts 8 and is provided with an arm 49 to engage a cam 50 on the lever 16 and thus limit the movement of the swell 22. The shaft 25 carries a pusher-finger 27 to act en a spring-controlled horizontally-pivoted pusherlever 31, whereby a fresh shuttle is transferred from the magazine into the shuttle-box. At the beat up, the rear wall is forced back by a stationary stop 21 acting on the arm 7, the pin 19 is unlocked, and the front wall returns to normal position. In order to keep back the shuttle during the changing operation, so that it will not interfere with the introduction of a new shuttle, the check-strap 45 of the picker 40 is withdrawn from the action of its spring 46 by being connected by a tension strap 48 to a lever 15 which is turned about a vertical axis against spring action by a curved part 47 connected to the front wall 11, the picker being acted upon by a tension member 42, a cranked lever 41, 41<1>, and a spring 44. When the rear wall is defected, the swell 22 acting through the rod 23 turns the shaft 25, but not sufficiently to place the finger 27 in operative position. When, however, the spent shuttle enters fully between the wall 3 and the swell 22, the latter is forced further outwards and the shaft 25 is turned sufficiently to place the finger 27 in operative position. When the fresh shuttle has been introduced, and the rear wall has returned to its normal position, the spent shuttle is freed and can fall, assisted or not by a spring. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following subject-matter:- Weft-feeler arrangements.-A feeler 92, Fig. 10 (Cancelled), is carried by a casing 74 mounted on an adjusting rod 76 adjustably fixed to an adjustable part 79 provided with a pin 82 carrying a cranked lever finger 83 having a set-screw, which engages the side of the shuttle when the lay beats up, if the pirn is spent, so as to engage an arm 88 of a cranked lever 88, 89. When the feeler is moved back, the lever 88, 89 is rocked, and, by means of a rod 90, a latch 66 is disengaged from a stop 67, so as to enable a spring 72 to turn an arm 65 carrying the latch and thus rotate the shaft 56 to depress the hank 18 into operative position. When the lay moves forward, the pin 17 acts on a curved part 91 and raises the hook 18, thereby turning the shaft 56 and arm 65 to enable the latch to re-engage behind the stop. This subject-matter does not appear in the Specification as accepted.