Movement composition device - Instrument's card

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Movement composition device

Dating

11 March 1940

Maker

Antonio Cherubini

It is a device for testing the vector composition of the speeds (equal in magnitude and perpendicular to each other) produced as a result of the simultaneous impact on a ball (missing) of the two hammers raised to the same height and left free at the same instant. If each collision imparts to the ball a speed parallel to the direction of the falling hammer which has generated it, when the two hammers arrive at the same time on the ball thus it moves with a speed that has a direction inclined of 45&dorm; degrees and has an intensity equal to the vector composition of the two single perpendicular speeds.

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Movement composition device

Cataloghi	Nº	Voce
Inv. 2016	159	Movement composition device Provisional numbering!
Inv. 1870	967	Apparecchio per il parallelogramma dei movimenti

Section

Mechanics

Window

Conditions

Incomplete

Working

Intact

Large	13.0 cm (5.1 in)
Width	13.0 cm (5.1 in)
Height	25.0 cm (9.8 in)

Materials

Sources

Bernardi G., Apparecchi di fisica, III Edizione, Ditta Prof. Gaetano Bernardi, Tranto, 1931, pag. 10, fig. 7269

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.