Nuts were rare metal screws, when made at all, were usually for use in wood. īefore this, screw threads were usually made by chipping and filing (that is, with skilled freehand use of chisels and files). This allowed for the standardization of screw thread sizes for the first time and paved the way for the practical application of interchangeability (an idea that was already taking hold) to nuts and bolts. Henry Maudslay developed the first industrially practical screw-cutting lathe in 1800. The implementation of standards in industry and commerce became highly important with the onset of the Industrial Revolution and the need for high-precision machine tools and interchangeable parts. Henry Maudslay's famous early screw-cutting lathes of circa 17. 83% of the weights which were excavated from the above three cities were cubic, and 68% were made of chert. The notation was based on the binary and decimal systems. The 13.7-g weight seems to be one of the units used in the Indus valley. This was evidence that strong control existed for at least a 500-year period. They did not find statistically significant differences between weights that were excavated from five different layers, each measuring about 1.5 m in depth. Shigeo Iwata describes the excavated weights unearthed from the Indus civilization:Ī total of 558 weights were excavated from Mohenjodaro, Harappa, and Chanhu-daro, not including defective weights. The weights and measures of the Indus civilization also reached Persia and Central Asia, where they were further modified. ![]() Uniform units of length were used in the planning of towns such as Lothal, Surkotada, Kalibangan, Dolavira, Harappa, and Mohenjo-daro. Technical standardisation enabled gauging devices to be effectively used in angular measurement and measurement for construction. ![]() Weights existed in multiples of a standard weight and in categories. The centralized weight and measure system served the commercial interest of Indus merchants as smaller weight measures were used to measure luxury goods while larger weights were employed for buying bulkier items, such as food grains etc. Standard weights and measures were developed by the Indus Valley civilization. 1.7 International Standards Associations.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |