Two masses for the centrifugal force - Instrument's card

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Two masses for the centrifugal force

Dating

1893

The two masses (which are joined by means of a wire) can rotate stably around a common axis only if both it passes through the segment joining the centers and a simple condition is respected between radii of rotation and the masses. If the strength of the wire is "replace" that of gravity, a miniature of the system Earth - Moon can be seen

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Two masses for the centrifugal force

Cataloghi	Nº	Voce
Inv. 2016	138	Two masses for the centrifugal force Provisional numbering!
Inv. 1925a	365	Due masse per detto (apparecchio di rotazione per esperienze sulla forza centrifuga)
Inv. 1870	628	Due masse per detto (apparecchio di rotazione per esperienze sulla forza centrifuga)

Section

Mechanics

Window

Conditions

Complete

Working D

Intact

Large	30.0 cm (11.8 in)
Width	12.0 cm (4.7 in)
Height	3.0 cm (1.2 in)

Materials

Sources

Bernardi G., Apparecchi di fisica, III Edizione, Ditta Prof. Gaetano Bernardi, Tranto, 1931, pag. 12, fig. 5074
Daguin P. A., Cours de physique élémentaire avec les applications a la météorologie , E. Privat, Toulouse, 1863, pag. 38, fig. 34
Galileo Officine, Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1929, pag. 58, fig. 5114
Magrini R., Apparecchi per l'insegnamento della fisica, Officine Galileo, Firenze, 1940, pag. 26, fig. B279
Privat Deschanel A., Trattato elementare di fisica, Fratelli Dumolard, Milano, 1890, pag. 30, fig. 16
Resti E., Catalogo generale di apparecchi per l'insegnamento della fisica, Ditta Emilio Resti di Franco Brambilla, Pubblicazi, Milano, 1930, pag. 18, fig. 76
Tarquini A., Apparecchi di fisica, Antonio Tarquini, Roma, 1928, pag. 29, fig. 123

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.

In order to avoid that instruments' cards without the english description text of the device be directly selected, I added a special filter with which only the complete cards are shown in the menu. Anyhow all the partial english instruments' cards (with instrument's dating, dimensions, state of conservation...) can always be seen even if they haven't the english description text. To read this uncomplete cards is sufficient to click, for example, on an instrument's picture or on the word "View" of the table column called "Card" every time they appear in the other pages of this database.