Sum of torque

[EOW]

The torque on the half disk is 2 times the torque on the device.

[EOW]

The device is always like I drawn. F1/F1' gives counterclockwise torque. F2/F2' gives a counterclockwise torque. The only problem is springs rotates the torus in the clockwise direction, so I will attract the torus 1 with the container 2 and attract the torus2 with the container1. I can't attract all the part of the torus but the bigger part so the torque is counterclockwise.

[EOW]

I hatching the area where I exchange the attraction (transparency mode):

Container 1 attract the torus 2
Container 2 attract the torus 1

Before the green line attract the green torus and the red line attract the red torus. But now, the green line attract the red torus where the hatched area is (don't forget there are 2 torus) and the red line attract the green torus where the area is hatched. The green line attract the rest of the green torus (not hatched area), and the red line attract the rest of the red torus like that there is no force on the green line and on the red line. Like that I don't have any force on the red line and on the green line.

I drawn container1+torus1 on one image and the same for the container2+torus2.

With one device the sum of energy is keeped. F1 and F2 want to turn counterclockwise but the attraction from the springs on the torus want to turn clockwise, so the sum is constant.

With 2 devices, I attract from the green line a part of the torus1 and a part of the torus2. The torque on the torus1 is near 0 or maybe it's counterclowise when I see the surface of the hatching compared of the all surface inside the container. It's the same for the torus2.

The device turns around the red center, it is always like I drawn: it's important to keep constant the length of the springs. The springs don't lost any energy.

[EOW]

The green line is fixed to the Container1, the red line is fixed to the Container2.
I don't attract all the torus, only the part that is inside the Container1 or the Container2.
The springs keep their length constant, the device turns around the red axis but all turns at the same angular velocity.

[EOW]

The device can be limited to one torus and one container. But the walls of the torus are separate of the interior torus. The inner wall and the outer wall of the torus is in contact with pressure, this pressure can't give any torque to the torus but gives the force F1 and F1 gives a counterclockwise torque on the device. Now, when I attract the interior of the torus it will rotates clockwise, but it's not the same energy I lost. With inner radius at 7 and outer radius at 8.72 the torque on the interior torus is 11.8 but the force F1 gives a torque of 17 and the force on the walls of the container gives a counterclockwise torque too.

At start, all the device turns counterclockwise.