1 янв 1760 г. - Invention of textile machinery

Описание:

It became widely used around Lancashire after 1760 when John's son, Robert , invented the drop box, which facilitated changing thread colors.
The roller spacing was slightly longer than the fibre length.
Too close a spacing caused the fibres to break while too distant a spacing caused uneven thread.

Добавлено на ленту времени:

Дата:

Изображения: