| 摘要 |
A power generator has a mass that is capable of moving vertically up and down. A generator has a rotor and a stator. A shaft couples the mass to the rotor, with the shaft allowing the mass to move vertically up and down. The shaft has spirals that produce relative rotation between the shaft and the rotor. The mass can float on a body of water that is subject to fluctuating water levels, such as a tidal body or a lock, or the mass can be used on dry land. The mass has an interior cavity. When the cavity contains gas, the mass rises in the water. When the cavity contains water, the mass sinks in the water. When the mass has sunk, gas is introduced into the cavity. When the mass has risen, the gas is vented from the cavity.
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