How was the hole in the sewing machine needle transferred to a sharp end? Detailed answer

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How was the hole in the sewing machine needle transferred to a sharp end? Detailed answer

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How was the hole in the sewing machine needle transferred to a sharp end?

Elias Howe, an American mechanic, developed his first sewing machine in 1844. He was very disturbed by the hole for the thread, located on the blunt end of an ordinary sewing needle. It and the thread trailing behind it did not allow the mechanism to easily pull the needle through the fabric.

The solution was prompted by a nightmare: the mechanic dreamed that he was captured by cannibals, threatening to kill him if he did not immediately create a sewing machine. At the same time, the savages violently shook their spears with holes in the tips! Waking up, Howe sketched a new needle design.

Since then, all sewing machines have used needles with a hole in the sharp end.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

What is metal?

It is not so easy to give an exact answer to the question: "What is a metal?" In terms of physical properties, a metal is a substance that has a bright luster and good conductivity of heat and electricity. However, these properties can also have substances that are by no means metals.

Metals differ greatly from each other in hardness, density, malleability and malleability. (Ductility means the ability to work metal with blacksmith hammers or presses, and malleability means drawing it into wire.) Each metal has a specific melting point, as well as the ability to form alloys with other metals.

At normal room temperature, all metals except mercury are solids. Some metals (for example, gold) can sometimes be found in nature in pure form, but most of them exist in natural conditions only in the form of compounds with other elements. Most often they occur in the form of sulfides, oxides, carbonates and silicates, usually with impurities of granite and other rocks. Many metals are found in ores in combinations with each other. These include lead, zinc, iron, copper, chromium, nickel and others.

Some of the metals are so rare in nature that in order to obtain a very small amount, for example, pure rhenium radium, it is sometimes necessary to process tens of tons of ore. The branch of industry engaged in obtaining pure metals and their alloys from natural raw materials is called metallurgy. Many metals in their pure form have properties that make it difficult to use them for one purpose or another. That is why most of them are used in the form of alloys or chemical compounds. For example, pure iron has insufficient hardness.

Therefore, as a rule, it is used in the form of steel, which is its compound with carbon, often with the addition of other metals: chromium, tungsten, vanadium, etc. Some metals are necessary for the existence of living beings. These include iron, calcium, sodium, magnesium and potassium. Even copper, aluminum and manganese, however, in very tiny amounts, are required for the normal development of the body.

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