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22.10.2012 20:43:55
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2.1. Device for reproduction of movement of fishes.

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In 1920, the Austrian scientist Franz Wels, who conducted the research into the mechanism of fish tail movements, has concluded that the local movement of the fish produces by curvature of the spine. The curvature of the spine is provoked by the additional reductions of related muscle fibers, which cause the bends of the fish body, always starting with the head, moving on to the tail in the form of wave-like fluctuations and again starting with the head. Moreover, these wave-like fluctuations occur in the plane perpendicular (or close to perpendicular) to the direction of the fish movement. The movements of birds and amphibians have the similar cause. On the basis of these studies Franz Wels constructed and in 1921 patented the device [1], created not only to reproduce the fish movement, but also to carry out useful work by displacing a flow of water. In his work, he suggested that this device can convert mechanical energy of muscular strength or chemical energy of fuel combustion engine into the useful work liquid transferring, and perform the reverse conversion of the kinetic energy of the water flow into the mechanical energy of the motor shaft rotation as well. However, the idea of transformation of energy of the liquid flow into the useful work has not got the confirmation and the efficiency of work of the device in the form of a pump for pumping the liquid was so small, that there was no further development. The author of the idea tried to reproduce mechanically the kinematics of the fish movements with the help of usual crank gear and crank-slide mechanism without deep understanding of the physical nature of these movements.
The author hoped to transfer the force of the flow impact to the element placed in the flow which has the ability to simulate the fish movements, and then, through the slider to the piston engine power. But at the same time the forces of mechanical dampening of the device, were so great, that there were no movements of the piston.

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