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The team gave kids a sheet of paper with just a few basic elements printed on it: some dots here, squiggles there and a rectangle that suggested a drawing frame.

In addition, a judge checked whether the children chose to incorporate a small shape just outside what looked like a rectangular drawing frame.

The Howard & Bullough Patent Electric Stop Motion Drawing Frame has proved one of the most successful machines ever invented, and there are large numbers of deliveries at work in every Cotton Spinning country.

It was also named the throstle, from the fact that it gave a humming or singing sound while at work; but it is commonly known as the drawing frame.

The material is then carried to a drawing frame, which takes the spongy slivers, and, carrying them through successive sets of rollers moving at increased speed, elongates, equalises, straightens and "doubles" them, and finally condenses them into two or more rolls by passing the same through a trumpet-shaped funnel.