After Big Temple and Tanjore Paintings, Tanjore is famous for its traditional toy called "Tanjavur Thalaiyatti Bommai" in Tamil language, which means "Tanjore Head-Shaking Doll". The heads of these dolls shake when disturbed and are detachable. The lower part of the body is bigger and heavier than the heads. As they nod their head with breeze, it is a delight to watch them move.
"Thanjavur Gundusatti Bommai" i.e. Tanjore Roundpot Rocking Doll is another type of Thanjavur Doll. These are basically a pair of a king and a queen symbolic of the many dynasties that homed Thanjavur. This doll is bottom heavy and gently bounces back and forth when disturbed.
These traditional Indian bobble-headed or roly-poly toys are made of terracotta or paper & clay. These toys are handmade and painted over with bright colors. This art dwelled in Thanjavur in the early nineteenth century during King Saraboji’s reign. Since then these toys are found only in Tanjore. Any tourist who steps in this city won’t leave without buying this toy. It is a souvenir to take home from the city.
Mechanisms in Thanjavur Roundpot Rocking Doll:
Here we going to learn about the Mechanisms which were used in Thanjavur Roundpot Doll,The centre of gravity and total weight of the doll is concentrated at its bottom-most point, generating a dance-like continuous movement with slow oscillations.
As the Center of Gravity lies in the Bottom of the doll, where the weight is more. It is Difficult for the doll to falldown. It regains its form sooner.
We can easily learn this by using our States of Equilibrium:
1) Stable Equilibrium:
If an External Force applied on cone, Then cone changes it position and returned to its own position.
2) Unstable Equilibrium:
If an External Force applied on cone, Then cone changed its position.
3) Neutral Equilibrium:
If an External Force applied on cone, Then Cone Doesnt changes its position.
Explanation:
From this Equilibrium we can notice that, if the Center of Gravity crosses the line of weight distribution line then the object falls. Thats y in the Thanjavur doll the center of gravity is pointed downwards it bit away from the center of mass.
So the center of mass crosses the line of weight distribution but it doesnot crosses the lines of center of gravity.
Hence the Object regains its own position.
This Same formula is used in Some of the brands car mechanisms, hence while drifting the cars the rolling of the cars can be avoided.
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