Patent GB-191319701-A (GB)
Title: Improvements in Doffing Mechanism for Spinning, Twisting, Doubling and like Machines used in the Production of Yarns or Thread of Fibrous Substances.
Inventor: STELL ALFRED
IPC: D01H9/04
Filed: 1913-09-01
Granted: 1914-08-27
Abstract: 19,701. Stell, A., Stell, J., and Welch, H. Sept. 1. Doffing-arrangements for cap spinning, twisting, and like frames. The full bobbins are removed from, and empty ones placed upon, the spindles by the use of semicircular supports or half - tubes adapted to take between the spindles and the bobbins. On the completion of the bobbins 6, the spindle rail 1, Figs. 2 and 5, is operated through a hand-wheel 11 and rack and pinion 2, 9 to raise the caps 4, the flanges 4<b> thereof being then engaged by bifurcated pieces 43 which are carried by racks 40 and advanced by operating a shaft 42 ; the rail 1 is then lowered to carry the spindles 3 clear of the caps, which are then carried against the rail B by retracting the racks 40. Brackets 17 carried by racks 16 are then raised by actuating a handle 14<a> and racks 21, slidable in the brackets, are advanced by operating a handle 20 to carry the bifurcated ends of plates 31, Fig. 8, beneath the bobbins which are raised, by operating the racks 16, high enough to enable the sharpened ends 47 of spring arms 46, operated from a shaft 45, to be engaged beneath the flanges of the bobbins and support them. Each plate 31 is mounted upon a plate 36, fixed on a pinion 29 engaging a rack 28 on a bar 27 which is mounted in brackets 23 carried by the racks 21, and carries two of the semicircular supports or half-tubes 32 ; springs 35, arranged between downwardly extending parts of the plate 31 and the plate 36, enable the supports to accommodate themselves to slight irregularities in the sizes or positions of the spindles. The full bobbins being supported by the arm 46, the brackets 17 are slightly lowered to enable the supports 32 to be advanced, by actuating the racks 21, to take against the spindles 3, and the shaft 45 is actuated to release the bobbins which fall upon the supports 32. The brackets 17 are then raised to carry the plates 31 clear of the spindles after which the racks 28 are moved by the handle 27<a> to rotate the plates and carry the full bobbins away from the spindles, the empty bobbins, carried by the other set of supports, being carried over the spindles. The arms 46 are moved to support these empty bobbins and the brackets 17 lowered to move the supports 32 clear of the bobbins. The plates 31 are then retracted and the arms 46 moved to allow the empty bobbins to fall upon the spindles after which the racks 40 are advanced to bring the caps over the spindles which are raised to engage, and to carry the bobbins within, the caps, the pieces 43 being returned to their initial position again. A notched rod 26 carried-by arms 25 on a shaft 24 journaled in the brackets 23 is then moved to pass over the tops of the full bobbins and carry the threads into proximity to the notched flanges 5<a> on the spindles, so that, on the frame being restarted, the threads from the full bobbins are broken and held by the flanges 5<a>. Thin vertical pins or equivalent devices may be used in place of the half-tubes 32 and, according to the Provisional Specification, the half-tubes &c. may be mounted upon lateral arms extending from bars.