Energy capture from oscillating object

A device for capturing energy from an oscillating object carrying the device, the device comprising:

• a frame;
• at least one rotor assembly, wherein each of the at least one rotor assembly comprises:
• a cradle;
• a rotor rotatably carried by the cradle so as to be rotatable about a rotation axis relative to the cradle;
• the rotor comprising an unbalancing weight to unbalance rotation of the rotor relative to the cradle;
• for each of the at least one rotor assembly, the respective cradle being pivotably carried by the frame so as to pivotally reciprocate within a limited range of reciprocal motion within the frame about a respective cradle pivot axis that intersects and is substantially perpendicular to the respective rotation axis;
• and
• at least one power take-off coupled to the respective rotor;
• further comprising a return actuator carried by the frame and mechanically coupled to the respective cradle of each of the at least one rotor assembly to urge the respective cradle to reverse within a range of reciprocal motion of the respective cradle;
• wherein the return actuator comprises:
• at least one counterweight slidably carried by the frame so as to be slidable relative to the frame, substantially parallel to each cradle pivot axis;
• the at least one counterweight being mechanically coupled to the at least one rotor assembly such that sliding motion of the at least one counterweight relative to the frame pivots each respective cradle of the at least one rotor assembly about the respective cradle pivot axis.