The Great Mechanical Inventions

Một phần của tài liệu An Introduction to the Industrial and Social history pdf (Trang 88 - 91)

commerce, the steadily increasing demand for English manufactured goods for export.

[Illustration: Distribution of Population According to the Hearth-tax of 1750. Engraved by Bormay & Co., N.Y.]

The great quantities of goods which were every year sent abroad in English ships to the colonies, to Ireland, to the Continent, to Asia and Africa, as well as those used at home, continued to be manufactured in most cases by methods, with instruments, under an organization of labor the same as that which had been in existence for centuries. The cotton and woollen goods which were sold in the West Indies and America were still carded, spun, and woven in the scattered cottages of domestic weavers and weaver-farmers in the rural districts of the west and north of England, by the hand cards, the spinning-wheel, the cumbrous, old-fashioned loom. The pieces of goods were slowly gathered from the hamlets to the towns, from the towns to the seaports, over the poorest of roads, and by the most primitive of conveyances. And these antiquated methods of manufacture and transportation were all the more at variance with the needs and possibilities of the time because there had been, as already pointed out, a steady accumulation of capital, and much of it was not remuneratively

employed. The time had certainly come for some improvement in the methods of manufacture.

A closer examination into the process of production in England's principal industry, cloth-making, shows that this pressure on old methods was already felt. The raw material for such uses, as it comes from the back of the sheep, the boll of the cotton plant, or the crushed stems of the flax, is a tangled mass of fibre. The first

necessary step is to straighten out the threads of this fibre, which is done in the case of wool by combing, in the others by carding, both being done at that time by hand implements. The next step is spinning, that is drawing out the fibres, which have been made parallel by carding, into a slender cord, and at the same time twisting this sufficiently to cause the individual fibres to take hold one of another and thus make a thread of some strength. This was sometimes done on the old high wheel, which was whirled around by hand and then allowed to come to rest while another section of the cotton, wool, or flax was drawn from the carded mass by hand, then whirled again, twisting this thread and winding it up on the spindle, and so on. Or it was done by the low wheel, which was kept whirling continuously by the use of a treadle worked by the foot, while the material was being drawn out all the time by the two hands, and twisted and wound continuously by the horseshoe-shaped device known as the "flyer." When the thread had been spun it was placed upon the loom;

strong, firmly spun material being necessary for the "warp" of upright threads, softer and less tightly spun material for the "woof" or "weft," which was wrapped on the shuttle and thrown horizontally by hand between the two diverging lines of warp threads. After weaving, the fabric was subjected to a number of processes of finishing, fulling, shearing, dyeing, if that had not been done earlier, and others, according to the nature of the cloth or the kind of surface desired.

In these successive stages of manufacture it was the spinning that was apt to interpose the greatest obstacle, as it took the most time. From time immemorial spinning had been done, as explained, on some form of the spinning-wheel, and by women. One weaver continuously at work could easily use up the product of five or six spinners. In the domestic industry the weaving was of course carried on in the dwelling-house by the father of the family with the grown sons or journeymen, while the spinning was done for the most part by the women and younger children of the family. As it could hardly be expected that there would always be as large a proportion as six of the latter class to one of the former, outside help must be obtained and much delay often submitted to. Many a small master who had agreed to weave up the raw material sent him by the master clothier within a given time, or a cloth weaver who had planned to complete a piece by next market day, was obliged to leave his loom and search through the neighborhood for some disengaged laborer's wife or other person who would spin the weft for which he was waiting. One of the very few inventions of the early part of the century intensified this difficulty. Kay's drop box and flying shuttle, invented in 1738, made it possible for a man to sit still and by pulling two cords alternately throw the shuttle to and fro. One man could therefore weave broadcloth instead of its requiring two as before, and consequently weaving was more rapid, while no corresponding change had been introduced into the process of spinning.

[Illustration: Spinning-Jenny. (Byrn, Invention in the Nineteenth Century. Published by the Scientific American Company.)]

Indeed, this particular difficulty was so clearly recognized that the Royal Society offered a prize for the invention of a machine that would spin several threads at the same time.

[Illustration: Arkwright's First Spinning-machine. (Ure: History of the Cotton Manufacture.)]

No one claimed this reward, but the spirit of invention was nevertheless awake, and experiments in more than one mechanical device were being made about the middle of the century. The first to be brought to actual completion was Hargreaves' spinning-jenny, invented in 1764. According to the traditional story James Hargreaves, a small master weaver living near Blackburn, on coming suddenly into the house caused his wife, who was spinning with the old high wheel, to spring up with a start and overset the wheel, which still

continued whirling, but horizontally, and with its spindle in a vertical position. He was at once struck with the idea of using one wheel to cause a number of spindles to revolve by means of a continuous band, and by the

CHAPTER VIII 89

device of substituting for the human hand a pair of bars which could be successively separated and closed, and which could be brought closer to or removed from the spindles on wheels, to spin several threads at the same time. On the basis of this idea and with the help of a neighboring mechanic he constructed a machine by which a man could spin eight threads at the same time. In honor of his wife he named it the "Spinning-jenny."

The secret of this device soon came out and jennies spinning twenty or thirty or more threads at a time came into use here and there through the old spinning districts. At the same time a much more effective method was being brought to perfection by Richard Arkwright, who followed out some old experiments of Wyatt of Northampton. According to this plan the carded material was carried through successive pairs of rollers, each pair running more rapidly than the previous pair, thus stretching it out, while it was spun after leaving the last pair by flyers adapted from the old low or treadle spinning-wheel. Arkwright's first patent was taken out in 1769, and from that time forward he invented, patented, and manufactured a series of machines which made possible the spinning of a number of threads at the same time very much more rapidly than even the

spinning-jenny. Great numbers of Arkwright's spinning-machines were manufactured and sold by him and his partners. He made others for use in cotton mills carried on by himself with various partners in different parts of the country. His patent was eventually set aside as having been unfairly obtained, and the machines were soon generally manufactured and used. Improvements followed. An ingenious weaver named Samuel Crompton, perceiving that the roller spinning was more rapid but that the jennies would spin the finer thread, combined the two devices into one machine, known from its hybrid origin as the "mule." This was invented in 1779, and as it was not patented it soon came into general use. These inventions in spinning reacted on the earlier processes and led to a rapid development of carding and combing machines. A carding cylinder had been invented by Paul as far back as 1748, and now came into general use, while several wool-combing machines were invented in 1792 and 1793.

[Illustration: Sir Richard Arkwright. (Portrait by Wright.)]

So far all these inventions had been in the earlier textile processes. Use for the spun thread was found in giving fuller employment to the old hand looms, in the stocking manufacture, and for export; but no corresponding improvement had taken place in weaving. From 1784 onward a clergyman from the south of England, Dr. Edward Cartwright, was gradually bringing to perfection a power loom which by the beginning of the nineteenth century began to come into general use. The value put upon Cartwright's invention may be judged from the fact that Parliament voted him a gift of £10,000 in 1809. Arkwright had already won a large fortune by his invention, and in 1786 was knighted in recognition of his services to the national industry.

[Illustration: Rev. Edmund Cartwright. (Portrait by Robert Fulton.)]

While Cartwright was experimenting on the power loom, an invention was made far from England which was in reality an essential part of the improvement in the manufacture of cotton goods. This was the American cotton gin, for the removal of the seeds from the fibre of the boll, invented by Eli Whitney in 1792. Cotton had been introduced into the Southern states during the Revolutionary war. Its cultivation and export now became profitable, and a source of supply became available at the very time that the inventions for its manufacture were being perfected.

Spinning-jennies could be used in the household of the weaver; but the later spinning-machines were so large and cumbrous that they could not be used in a dwelling-house, and required so much power and rapidity of motion that human strength was scarcely available. Horse power was used to some extent, but water power was soon applied and special buildings came to be put up along streams where water power was available.

The next stage was the application of steam power. Although the possibility of using steam for the production of force had long been familiar, and indeed used to some extent in the pumping out of mines, it did not become available for general uses until the improvements of James Watt, patented in 1769 and succeeding years. In partnership with a man named Boulton, Watt began the manufacture of steam-engines in 1781. In 1785 the first steam-engine was used for power in a cotton mill. After that time the use of steam became more and more general and by the end of the century steam power was evidently superseding water power.

*57. The Factory System.*--But other things were needed to make this new machinery available. It was much

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