Patent GB-191029057-A (GB)
Title: Improvements in Apparatus for Automatically Changing Bobbins and the like in Loom Shuttles.
Inventor: STEIER HUGO
IPC: D03D45/20
Filed: 1910-12-14
Granted: 1911-12-14
Abstract: 29,057. Steier, H. Dec. 14. Shuttles, changing bobbins and the like in, automatically; shuttles.-When the weft-fork or weft-feeler mechanism 'is operated, the bobbin magazine, or a box or carrier which receives a bobbin from the magazine, moves with the lay during a whole or substantially a whole forward movement thereof or during several revolutions of the loom shaft, and the bobbin is transferred into the shuttle during this time by mechanism mounted partly on the lay and partly on the bobbin magazine or box or carrier, or on the magazine only. In one arrangement, the bobbin magazine 1, Fig. 1, is carried by a batten 2 mounted on the shaft 3 of the lay 4, and has a spring-controlled snap-hook 5 normally engaged by a hooked lever 6 on a shaft 8, whereby the lay is normally retained in the position shown against the action of a spring 7. When the weft-fork mechanism &c. is actuated, the shaft 8 is turned and the hook 6 is disengaged from the hook 5, so that the spring 7 moves the magazine batten 2 back with the lay, the batten 2 moving with the lay during one or more revolutions of the loom shaft. A cam-lever 17, pivoted at 16 to the loom frame and linked to the lever 6 or other arm on the shaft 8, is also depressed, so that its cam part lies in the path of a projection 19 on a spring-controlled pressing-lever 14 on the lay 4. When the lay moves forwards again, the lever 14 is rocked, an extension 15 thereof operating a spring-controlled lever 12 carrying a pusher 10, which transfers a bobbin from the magazine into the shuttle. Before the pusher 10 is depressed, a cam 21 on the lever 14 moves the magazine batten 2 slightly forwards, to position the pusher 10 exactly over the shuttle. If the shuttle is not correctly boxed, a stop 22 fixed to the magazine-batten 2 strikes against it when the lay moves forwards, the batten 2 being thereby forced away from the lay 4, so that the lever 14 is unable to act upon the pusher 10, no bobbin - replenishment being effected. The pick is delayed at the changing end of the loom for one revolution. In a modification, however, it is delayed for several revolutions by moving the picking-cam through mechanism controlled by the weft-fork mechanism &c., the shuttle then remaining beneath the magazine for several revolutions of the loom shaft. In this modification, the lever 17 is formed without a cam portion and is caused to descend slowly, the weft-fork hammer being operated by a cam on a shaft driven at half the speed of the tappet-shaft. In another modification, the lever 17 is vertically movable about an horizontal pivot and is horizontally movable about a vertical pivot, the shuttle when incorrectly boxed operating a stop-rod on a shaft carrying a cam, which moves the lever 17 about the vertical pivot out of the path of the projection 19. The lever 17 may directly operate the pusher 10. The weft ends are looped on an arm fixed to the magazine. In another modification, the magazine 1, Fig. 4, is attached to a plate 28, supported on rollers on a table 30 adjustably secured to the breast beam, the plate and magazine being normally retained in a rear position against spring action by a ratchettooth 35 on a lever 36, which passes through a slot in the table 30 and engages a recess in the plate or magazine side. When the shaft 8 is operated, a lever 38 is rocked and the lever 36 pivoted thereto is withdrawn from its notch. By means of a spring-controlled lever which engages a pin 55 on the plate 28, this plate and magazine are caused to slide forwards so as to follow the movements of the lay. A hook 57 on the lever 36 engages and depresses a hooked or ratchet lever 44 suspended from a lever 43, which engages a slot in a projection 41 on the breast beam and is provided with a lateral projection 47 working in a curved slot in the projection 41. When the lay returns, it again thrusts forwards the magazine, and a cam part of a pressing-lever 49 pivoted at 50 to the magazine wall engages the projection 47, whereby the pressing-lever is depressed together with another spring-controlled pressing-lever connected thereto at the opposite side of the magazine, these pressing-levers then actuating the pusher 10 to transfer a fresh bobbin into the magazine. Arms 64 on a spring-controlled shaft 62 act on the bobbins to press them forwards under the pusher. These arms may be raised to an inoperative position out of the way when introducing fresh bobbins into the magazine, and may be retained in this position by a spring-controlled hook 67 on the lever 43, this hook engaging a ratchet-tooth on the shaft 62. Subsequently, when the next bobbin-changing occurs and the lever 43 moves downwards, the hook 67 is disengaged for the ratchet-tooth and thus allows the levers 64 to fall, if the workman should forget to lower them previously. To prevent injury to the workman by the levers 64 being automatically released while he is filling in fresh bobbins, a hand-operated locking-device is provided for locking the magazine at rest until the workman has finished filling-in. The bobbin pusher operates a stop on a spring arm when it moves downwards, this spring arm contacting with a bar 60 on the lay, whereby the magazine is pushed forwards into correct position for bobbin-transfer. The magazine may be rotatably mounted on a pin on the plate 28, so that if the lay becomes inclined the magazine may be moved to an inclined position, being subsequently returned to normal position by spring action. Moreover, if the magazine is released at the wrong time and is engaged by the picking-stick, damage is prevented by the magazine rotating. The weft ends are attached to a knob arranged slightly below the centre of curvature of the bobbin-guides, so that the threads slacken before the bobbins are fed into the shuttle. In another modification, the magazine is rigid, but a box 74, Fig. 9, which is provided with a slot 77 to receive the lowest bobbin from the magazine and with springs 78, 79 to retain the bobbin, is arranged on a guided carrier 76, the opening in the magazine being closed when the box moves away from the magazine by a lever actuated by the weft-fork mechanism. The shuttle employed has a spindle provided at both ends with heads 80, 81, Fig. 11, connected by bars 82. On one of the heads, the spindle carrying the bobbin 13 is rotatable, while the other head 81 has a hole in it to receive the weft thread.