Contrary to the public opinion, who think that the French wrench belongs to the French and was invented by a Frenchman, but it is interesting to know that this wrench was made in 1842 by an Englishman named Richard Clabren. .
In some European countries such as France, Germany or Spain, this tool is called an English wrench. Little by little, it was perfected by different people until in 1891, a Swedish person named Peter Johnson designed and built it in its present form, so that we know it as the French wrench.
Of course, it is interesting to know that the French key is a word that is applied to this tool in some countries, including Iran. And in some other countries, such as Poland, Romania, or Hungary, it is called a Swedish wrench.
French wrench and its uses
As bolts and nuts come in different sizes, it is necessary to have different sizes of wrenches for each bolt and nut of different sizes.
But it is not really possible to People like repairmen, who deal with this type of tools continuously, carry a heavy and bulky set of tools and equipment with them so that they all coordinate with each other. Fortunately, there are some tools to solve this problem. It is designed so that their series can be replaced or adjusted, and by adjusting its opening, a wide range of bolts and nuts in different sizes can be opened and closed, and the French wrench is one of the most important and one of the most practical tools in this type of tool. It is considered self.
The French wrench has two tongues, one fixed and the other movable and adjustable.
Its movable tongue is moved by turning a spiral-shaped screw in the middle of the wrench.
The movable tongue of the French wrench is more resistant to pressure than its fixed tongue, and in order to reduce this pressure on the movable part, the tip of most wrenches (on the fixed part) is usually angled 15 degrees towards the movable part.