The invention of the Katasa testing machine in the late Taisho period and the characteristics of Rockwell and Vickers.
[Reproduction of Private Spring Preparatory School Lecture 8] Explanation of two new hardness testing machines! Inventions of Rockwell and Vickers.
Last time, we studied the advancement of automobiles and the development of the spring industry in the late Taisho period. Now we are entering the Showa period, but two new hardness testing machines were invented in the late Taisho period, which I previously omitted, so I will explain them here. I mentioned earlier that the Brinell hardness tester was invented in 1900, followed by the Shore hardness tester six years later. A little later, in 1919 (the 8th year of Taisho), the Rockwell hardness tester was developed, and six years after that, in 1925 (the 14th year of Taisho), the Vickers hardness tester was invented. Looking at this, we can see that Brinell and Shore were born in the late Meiji period, while Rockwell and Vickers were born in the late Taisho period. *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.
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