| Béranger's scale |
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| Dating | 12 April 1919 |  |
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| This type of scale with particular suspension of the plates is a model quite diffuse also today. The tool is also known as Roberval's scale or, in its improved model, as Béranger's scale. The scale with bottom suspension of the plates is an idea (1669) of the French scientist Gilles P. de Roberval (1602-1675). The system of levers inside (based on the articulate parallelogram) was then improved by other, as was done in 1849 by the engineer Joseph Béranger (1802-1863), whose scale model had a wide diffusion. Like all the instruments used to measure the mass, it has a set of weights, in this case with 13 weights. The maximum weight is 1 kg, while the minimum one is 1 g (so it is not possible to measure a variation of mass lower than 1 g). The 1g weight and the two 2g ones has gone lost. |
| Web page | Béranger's scale |
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| Section | Mechanics |
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| Window | Non esposto |
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| Conditions | | | Large | 38.0 cm (15 in) |
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| Width | 15.0 cm (5.9 in) |
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| Height | 16.0 cm (6.3 in) |
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| Materials |
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| Sources |
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Perucca E., Fisica generale e sperimentale, Unione Tipografico-Editrice Torinese, Torino, 1937, Vol. 1, pag. 64, fig. 79
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| The additional indications which integrate the items of the conservation's state have the following meaning:
(?) = maybe complete; M = maintenance; P = partial; R = restored; D = used for teaching; NC = not checked; X = impossible to verify. |