Patent GB-894362-A (GB)
Title: Improvements in or relating to spinning frames
Inventor: ARAI TAKEJI
IPC: D01H1/36
Filed: 1959-05-14
Abstract: 894,362. Ring-spinning apparatus. O-M SPINNING MACHINE MFG. CO. Ltd. May 14, 1959,No. 16621/59. Class 120(2) In a ring-spinning machine comprising a ring- rail traversed by a reciprocated sprocket 16 and a chain 7 supporting the ring rail, the sprocket is mounted on an arm 62 biased to be released when winding is completed so that the sprocket is released to pay out a length of chain to lower the rail whereby the yarns wind on the necks of the spindles as they continue to revolve due to the inertia of the machine, and trip mechanism is provided to retain the arm against release during winding, which mechanism is automatically released when winding is completed. The arm 62 is pivoted at 63 and its weight and that of the sprocket 16 are not completely balanced by the pull of a spring exerted on one end through a chain 65. During winding, the lever is held in the position shown by the engagement of a detent 58 in a shoulder 70, the detent being held in position by a stop 57 on one side of a lever 55, the other side of which is forced downwardly against the pressure of a spring 54 by a link 52<SP>1</SP> through the agency of an electromagnet 45. When winding is completed, the operating current is automatically cut off and the magnet de-energized whereupon the lever 55 is pushed upwardly by the spring 54 for the stop 57 to force the detent 58 out of engagement. The arm 62 accordingly swings downwardly into a position 64<SP>1</SP>, taking the sprocket 16 and a chain 15 with it, whereby the latter slackens and allows the ring-rail to fall by its weight to a position where the rings coincide with the necks of the spindles. To prevent the detent from being released if the current is interrupted before winding is completed, a member 71 is secured on the shaft 64 to follow the movement of the sprocket 16 so that when winding is completed, the position of a notch 72 coincides with that of a trip-piece 61 carried by the lever 55. Until winding is completed therefore, the trip-piece is supported by the member 71 and prevents release of the detent 70 even if the magnet is ineffective and the spring 54 is tending to free it: when winding is completed, the trip-piece falls into the notch 72 and the lever 55 is free to be acted upon by the spring 54 for the detent 70 to be released. The chain 15 is connected at one end to a sprocket 12 connected by another chain 13 to a bar 5 which is connected to a lever 8 supporting a ring-rail poker 3 by the chain 7. At its other end, the chain 15 is connected to the sprocket 16 which is connected by a further chain 19 to a sprocket 20 pivoted on a lever 31 oscillated by a cam 28 to provide the traverse: the gain is provided by the gradual shortening of the effective length of the chain 15, 19 by the intermittent rotation of the sprocket 20 from a ratchet wheel 36 which is advanced step-by-step by a pawl 41 fixed to the lever as the latter engages a stop 43 at each oscillation. During winding, the attraction of the magnet 45 causes a detent 53 to be held in engagement with a collar 78 on a bar 48 which is urged to the left by a spring 49; when the magnet is de-energized the pawl is released to allow the bar to move to separate the parts of a clutch 23, 24 which couples a driving-shaft 22 to the shaft 25 which drives the cam 28. For winding to recommence, the arm 62 is restored to position by a winding-handle applied at 69 and the ring- rail is raised to starting position by a handle applied at 33.