Scales on the Archimedean spiral. Drawing, description

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Scales on the Archimedean spiral. Children's Science Lab

Children's Science Lab

All the huge set of scales can be divided into two classes: spring and lever.

Can you think of anything else? Difficult. But P. Zakamsky from the Mangyshlak region proposed his own design of weights. Its idea is as follows. The object to be weighed is suspended on a cable wound around a pulley. The weight is suspended from another pulley rigidly connected to the first one. The second pulley has the shape of an Archimedean spiral.

Scales on the Archimedean spiral

Zakamsky's scales balance themselves: the pulleys rotate until the moment of the weight of the weight being weighed becomes equal to the moment of the weight of the weight.

The angle of rotation of the arrow of the scales fixes the ratio of the masses of the kettlebell and the load.

The scale of these weights can be graduated either in mass units or in relative units. This is very convenient for three control weighings, when it is not the absolute value of the mass that is important, but the percentage deviation from the given value.

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