bukhara engineering-technological institute

1479737725_64566.pptx charles fredrick wiesenthal , a german-born engineer working in england was awarded the first british patent for a mechanica l device to aid the art of sewing, in 1755. his invention consisted of a double pointed needle with an eye at one end. [2] in 1790, the english inventor thomas saint invente d the first sewing machine design, but he did not successfully advertise or market his invention. [3] his machine was meant to be used on leather and canvas material. it is likely that saint had a working model but there is no evidence of one; he was a skilled cabinet maker and his device included many practically functional features: an overhanging arm, a feed mechanism (adequate for …

Формат PPTX, 2,1 МБ. Чтобы скачать "bukhara engineering-technological institute", нажмите кнопку Telegram слева.