MANUFACTURE OF PINS.

Previous

WE often hear the expression used, when talking of anything comparatively useless, that "it's not worth a pin;" and from this we might be led to suppose, did we not know it to be otherwise, that a pin was a very worthless thing, instead of being what it is—one of the most useful that is manufactured in this or in any other country. As the use of pins is principally confined to the female portion of our community, perhaps the following short account of their manufacture, for which we are indebted to Knight's "CyclopÆdia of Industry," a very useful book, may not be uninteresting to our readers:—

"Pins are made of brass wire. The first process which it undergoes, by which any dirt or crust that may be attached to the surface is got rid of, is by soaking it in a diluted solution of sulphuric acid and water, and then beating it on stones. It is then straightened; after which, it is cut into pieces, each about long enough for six pins. These latter pieces are then pointed at each end in the following manner: The person so employed sits in front of a small machine, which has two steel wheels or mills turning rapidly, of which the rims are cut somewhat after the manner of a file: one coarse for the rough formation of the points, and the other fine for finishing them. Several of these pieces are taken in the hand, and, by a dexterous movement of the thumb and forefinger, are kept continually presenting a different face to the mill against which they are pressed. The points are then finished off by being applied in the same manner to the fine mill. After both ends of the pieces have been pointed, one pin's length is cut off from each end, when they are re-pointed, and so on until each length is converted into six pointed pieces. The stems of the pins are then complete. The next step is to form the head, which is effected by a piece of wire called the mould, the same size as that used for the stems, being attached to a small axis or lathe. At the end of the wire nearest the axis is a hole, in which is placed the end of a smaller wire, which is to form the heading. While the mould-wire is turned round by one hand, the head-wire is guided by the other, until it is wound in a spiral coil along the entire length of the former. It is then cut off close to the hole where it was commenced, and the coil taken off the mould. When a quantity of these coils are prepared, a workman takes a dozen or more of them at a time in his left hand, while, with a pair of shears in his right, he cuts them up into pieces of two coils each. The heads, when cut off, are annealed by being made hot and then thrown into water. When annealed, they are ready to be fixed on the stems. In order to do this, the operator is provided with a small stake, upon which is fixed a steel die, containing a hollow the exact shape of half the head. Above this die, and attached to a lever, is the corresponding die for the other half of the head, which, when at rest, remains suspended about two inches above the lower one. The workman takes one of these stems between his fingers, and, dipping the pointed end of a bowl containing a number of heads, catches one upon it and slides it to the other end; he then places it in the lower die, and, moving a treadle, brings down the upper one four or five times upon the head, which fastens it upon the stem, and also gives it the required figure. There is a small channel leading from the outside to the centre of the dies, to allow room for the stem. The pins are now finished as regards shape, and it only remains to tin or whiten them. A quantity of them are boiled in a pickle, either a solution of sulphuric acid or tartar, to remove any dirt or grease, and also to produce a slight roughness upon their surfaces which facilitates the adhesion of the tin. After being boiled for half an hour, they are washed, and then placed in a copper vessel with a quantity of grain tin and a solution of tartar; in about two hours and a half, they are taken out, and, after being separated from the undissolved tin by sifting, are again washed; they are then dried by being well shaken in a bag with a quantity of bran, which is afterwards separated by shaking them up and down in open wooden trays, when the bran flies off and leaves the pins perfectly dry and clean. The pins are then papered for sale."

Pins are also made solely by machinery. There is a manufactory for this sort (the Patent Solid Headed Pins, near Stroud) where nearly 3,250,000 are made daily.

A pin, then, is not such an insignificant article, after all. We see it has to go through a great many processes and hands before it is finished. If we take one, examine it closely, and mark how nicely it is made, how neatly the head is fixed on to the shank, how beautifully it is pointed, and how bright it shines, we shall see a very good specimen of what the ingenuity and labor of man can do upon a piece of metal. It is really surprising what a large number are made, and how many persons are employed in their manufacture. We read, some time ago, an amusing article from "Bentley's Miscellany," wherein the writer asks the question: "What becomes of the pins?" and puts forth the rather curious assertion that, if they continue to be lost and made away with as they are now, some day or other the whole globe will be found to be "one vast shapeless mass of pins."

In conclusion, we would recommend our readers always to bear in mind the excellent maxim which Franklin attached to a pin, namely, "A pin a day, a groat a year."

Decorated Line
                                                                                                                                                                                                                                                                                                           

Clyx.com


Top of Page
Top of Page