Energy converter module

An energy converter for converting rotational energy to mechanical strain energy in spiral springs, the converter unit including:

• a frame;
• an axle for receiving a torque, the axle operatively mounted on the frame for rotation;
• a plurality of spiral spring modules, each one operatively mounted to the axle and the frame, each spiral spring module including
• at least first and second serially-connected spiral spring elements having first and second ends radially spaced from one another, the first spiral spring element being oppositely-wound from the second spring element, the first end of at least one of the serially connected spring elements being operatively connected to the axle, with the first end of at least one other serially connected spring element being operatively connected to the frame,
• wherein the second end of each spring element is free to move radially inward and outward, and operatively connected by a link such that the link extends across all the second ends of the springs in the plurality of spiral spring modules.