Take two shafts, one above the other, stretch the tape on them. Now, on this tape in a circle we will hang the camera (camera must have the form of the blacksmith's forge, but the length of the horizontal far longer).

 In our example, suppose that there will be 20 cameras. All 10 cameras are located on one side (say from the right) are filled with liquid and pressed down, and on the left side of the chamber empty and closed by valves, ie, no weight. All the opposite chamber communicated with each other communication channels and are hermetically sealed, for example - the first from the eleventh camera, second camera is reported only from the twelfth, etc.

   With the width of the chamber perpendicular to the tape 20 cm, height of the device will be 2 pm; besides, we divide each cell into several cells with the help of interior partitions with flaps.

   Suppose in our example, we divide each cell from the inside with 10 parts-cells, which in turn severely squeezed by the valves. On the top cover cameras have shoulders, which, passing through the lowest point of the device in contact with the floor surface and cause the camera to shut down, squeezing out a liquid on the top pairing Reported opposite chamber. Suppose in each chamber to the right of 100 kg of liquid. The lowest, such as 1-I camera in the direction of rotation, after going under the weight of cameras, squeezing between the floor and the tape is forced to pass its contents from the first cell on the top opposite the 11th chamber, because the cumulative weight of a 9-trail walking camera is 900 kg, while the lower chamber is squeezed in parts of 10 kg. That is, the ratio of the mass of a pressing force to the extruded mass of 90 / 1 (this ratio can be increased). Then open the next cell, then a third, and so in turn the liquid from the lower chamber embossed upward. And under the weight of the fluid-filled upper chamber starts to fall down and depressed the camera enjoys upwards rotating tape. And so every regular camera: one freed from the liquid, the other filled with it, forcing the shaft to rotate continuously ...

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