Patent GB-191008389-A (GB)
Title: Improvements in and connected with Spinning, Twisting and like Frames.
Inventor: WATZLAWIK FRITZ
IPC: D01H9/02
Filed: 1910-04-07
Granted: 1910-10-13
Abstract: 8389. Watzlawik, F. April 7. Doffing - a r r a n g em e n t s ; spindle apparatus.-In an automatic device in a spinning, twisting, or like frame, for removing the completed bobbin without interrupting the working of the machine, the spindle which reciprocates is given an extra movement, and the bobbin which is engaged by a fixed stop is thereby removed from the spindle, the thread is then cut, and the parts returned into working position, the remaining end of the thread being caught upon the spindle. The yarns 17 pass through a preliminary twist tube 21 to drawing - rollers and thence to the flyer 16, which rotates and winds the yarn diagonally on the end of the reciprocating spindle 7. A rod 5, supported at the side of the frame 1, is reciprocated by a heart cam 3 acting on a roller 4 at the end of the rod, and is connected by a cross-bar 8 to the spindle 7 and to a second parallel rod 6. A weight 11 keeps the roller 4 in contact with the cam 3. An arm 29, depending from the end of the spindle 7, engages as it reciprocates a pivoted arm 26 and causes it to oscillate against the action of a leaf spring 27, and to impart by a pawl 28 intermittent rotation to a gear 30 and thence to a shaft 31. A spiral cam 33 is mounted on the shaft 31 and the end of a lever 36 engages this cam and is moved by it. The movement of the upper end of the lever 36 carries a weight 38 along a pivoted rod 39, on which is mounted a brake block 41 resting on the spindle 7, so that as the bobbin grows the braking effect is automatically increased. A lever 43 is linked to the lever 36, and the upper end of the former is adapted to have been raised sufficiently, when the bobbin is completed, to lift a notch in a spring-controlled bar 44 over a fixed projection 47. The movement of the bar 44 which is connected to a lever 49, the upper end of which engages a pulley 50, clutches the pulley to the driving-shaft 12 and winds up a cord 53 lifting a lever 55 and rotating a shaft 54. This rocks a bar 62 which engages a projection 63 on the rod 6, and moves the rod 6 and spindle 7 longitudinally in excess of the ordinary reciprocating movement. The bobbin comes in contact with an adjustable stationary stop 24<a>, and is stripped from the spindle and falls into a chute, the yarn end lying between the blades of a pair of shears 66 situated beneath the spindle. These shears are operated by a rod 58 on the rotation of the shaft 54, there being sufficient lost motion between the parts 59, 60 to allow the necessary lapse of time for the removal of the bobbin. As the bar 6 is moved by the arm 62 a projection 67 engages an arm on a shaft 69, rotating it and thus moving by a link 70 the pivoted arm 71 which carries the gear 30. The gear 30 is thus moved away from the gear 32 and the shaft 31 is left free to rotate. This enables a spring 74 to move the lever 36 back and adjust the braking action of the block 41 for the recommencement of the winding. The lever 43 is likewise moved back, leaving the rod 44 free to drop. back into its original position. The rotation of the shaft 54 simultaneously with the operation of the shears rocks a lever 76 and takes a roller 77 into engagement with the lever 49 unclutching the pulley 50 and taking the bar 44 back into its original position, the notch engaging the projection 47. The unclutching of the pulley 50 allows the lever 55 to drop by its own weight and the shaft 54 is moved back with all its connexions, into its original position, the bar 6 and spindle 7 move back, the yarn end winds round the spindle, and the machine continues its normal operation. The spindle 7 is driven frictionally by a driven sleeve a, Fig. 7, to prevent breaking of the yarn at the commencement of the winding. The yarn is led on to the bobbin by a guide or presser d pivoted on one arm of the flyer 16, and held in engagement with the bobbin by spring and centrifugal pressure.