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See also:SPINNING (from O. Eng. spinnen, to spin, cf. Ger. spinnen, &c., the Teut. See also:root is seen, to draw out, cf. span, spider)
, the forming of threads by See also:drawing out and twisting various See also:fibres
.
There is ample See also:evidence of the See also:great antiquity and wide See also:diffusion of the See also:art of See also:spinning, for spinning necessarily precedes See also:weaving (q.v.) whenever See also:short fibrous materials have to be made into threads, and weaving is one of the primal and most universal employments of mankind
.
Either remains of implements employed in spinning, or spun threads, are found wherever traces of prehistoric See also:man make their See also:appearance
.
The See also:simple spinning apparatus which was used in the earliest ages continued to be used by civilized communities till comparatively See also:recent times, and it may therefore be said that no art which has been so See also:long and widely practised remained so unprogressive as that of spinning
.
On the other See also:hand, since about the See also:middle of the 18th See also:century, when human ingenuity See also:bent itself in See also:earnest to improve the art, there have not been See also:developed in the whole range of See also:mechanical See also:industries See also:machines of greater variety, delicacy of See also:action, and manifold productive capacity than those now in use for spinning
.
The See also:primitive See also:thread-making See also:implement consisted of a wooden spindle, from 9 to 15 in. long, which was rounded and tapered at both extremities, as in the accompanying figure
.
Near the
Primitive Spindle
.
See also:top there was usually a notch in which the See also:yarn was caught while undergoing the operation of twisting, and See also:lower down a whorl, or wharve, composed of a' perforated disk of See also:clay, See also: Simple as was this primitive apparatus, a dexterous spinner could produce yarn of an evenness, strength and delicacy such as has scarcely been exceeded by elaborate See also:modern appliances . The yarns for the See also:gossamer-like See also:Dacca muslins of See also:India were so See also:fine that z lb See also:weight of See also:cotton was spun into a thread nearly 253 in. long . This was accomplished with the aid of a See also:bamboo spindle not much bigger than a darning See also:needle, and which was lightly weighted with a pellet of clay . Since such a See also:tender thread could not support even the weight of so slight a spindle, the apparatus was rotated upon a piece of hollow See also:shell . The spindle as here described was, so far as is known, the See also:sole apparatus with which yarn was spun until comparatively recent times . The changes in modern spinning have had for their See also:object: (r) the providing of mechanical means to rotate the spindle, (2) an automatic method of drawing out the fibres, and (3) devices for working a large See also:group of spindles together, at speeds before unattainable . The first improvement consisted in cutting a See also:ring groove in the wharve, mounting the spindle horizontally in a See also:frame, and passing a See also:band from a large See also:wheel See also:round the wharve . A rotatory motion was then given to the spindle by turning the wheel with the left hand . After attaching the filaments to the spindle they were attenuated with the right hand, and when fully twisted the thread was moved to See also:form a right See also:angle with the spindle and coiled upon it . Such a wheel has long been known in India, and from a drawing in a 14th-century See also:manuscript in the See also:British Museum it is obvious that it was not unknown, although far from being in See also:general use, in See also:Europe at that See also:early date . It came ultimately to be known in See also:England as the " bobbing wheel," and was in See also:constant use down to the beginning of the 19th century for spinning coarse and fine yarns But fine yarns received two spinnings; the first consisted in drawing out and slightly twisting the fibres into what is still known as a roving, and by the second spinning the roving was fully attenuated and twisted . In 1533, a See also:citizen of See also:Brunswick is said to have cranked the See also:axis of the large wheel and added a treadle, by which the spinner was enabled to rotate her spindle with one See also:foot and have both hands See also:free to manipulate the fibres .
It is not possible accurately to See also:fix the See also:dates at which all improvements in spinning appliances were made; it is certain that many were known and used long before they were generally adopted
.
Thus the flyer, which twists yarn before winding it upon a bobbin, is shown in a drawing by Leonardo da See also:Vinci, together with a See also:device for moving the bobbin up and down the spindle so as to effect an even See also:distribution of the yarn
.
During the 16th century a See also:machine of the foregoing type was widely used, and came to be known as the See also:Saxony wheel
.
It changed spinning from an intermittent to a continuous operation
.
The spindle had affixed upon its See also:outer end a wooden flyer, whose forked legs were far enough apart to enclose a See also:double-flanged spool, and at short intervals bent wires, known as the heck, were inserted in each See also:leg for the purpose of guiding the thread evenly upon the spool
.
This spool was loosely threaded upon the spindle and one of its flanges was grooved to take a See also:driving band from the large wheel, hence the spindle and the spool were separately driven, but the former at a higher See also:speed than the latter
.
The twisted filaments were drawn through an See also:eye in the flyer, led' along one of its legs, and made fast to the spool
.
By operating the treadle the flyer twisted all the fibres about a See also:common axis once for each revolution, and the spool wound up the length thus spun: the thread being slipped from tooth to tooth of the heck at See also:regular intervals to See also:direct it evenly across the spool
.
During the 17th century a second and similar spindle and flyer were added, and these left the spinner free to manipulate one thread with her right, and another with her left hand
.
It was in this See also:condition that the most advanced form of yarn-making was carried on until a great See also:series of inventions revolutionized spinning, and laid the See also:foundations of the factory See also:system which now prevails
.
The remaining See also:part of the problem which See also:lay before inventors was to draw out masses of parallel fibrous material, and twist them into uniform strands by mechanical means
.
The first See also:stage in the See also:evolution of mechanical spinning was effected by the invention of See also:Lewis See also:Paul, of See also:Birmingham, who obtained a patent in 1738, and who was assisted by See also:
The essential features of this invention consisted in passing carded slivers between pairs of parallel rollers, each succeeding pair of which moved faster than the preceding pair, to attenuate the sliver to the required extent
.
From Paul's See also:specification it would appear that he attempted to turn the rollers about their See also:horizontal and See also:vertical axes simultaneously, in See also:order to draw out the fibres and twist them at one operation
.
But healso mentions a See also:plan for which he procured a patent twenty years later, namely, the use of only one pair of rollers working in See also:conjunction with a bobbin which See also:drew off the thread faster than the rollers delivered the sliver, and coiled the thread about itself
.
The bobbin, therefore, attenuated, twisted and wound the material
.
Neither plan proved a commercial success
.
See also:
By means of the traveller a thread was held in the best position for winding upon a spool, as well as put under the necessary tension
.
Later inventors have so altered the construction of the ring, traveller and spindle that a speed of upwards of t I,000 revolutions per See also:minute can now be attained
.
This represents the highest development of continuous spinning
.
Whilst endeavours were being made to perfect continuous spinning, See also:attention was also directed to perfecting the intermittent See also:process as represented by the bobbing wheel
.
Between the years 1764 and 1767, See also:
But his rollers did not fully attenuate the rovings before twisting them, as is the See also:case with continuous spinning, neither was stretching alone relied upon
.
From its introduction this machine was able to spin finer and more elastic threads than any of its rivals, but for a See also:time the preparation of suitable rovings was a source of great trouble
.
The immediate consequence of the decision of the See also:court of See also: |
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