Abstract: This invention is for a starting apparatus for an inertial pendulum. The apparatus is provided with elastic strands twisted about each other and inelastic strands wound about the twisted strand and the ends of the strands are secured to each other so that when one end of the strands is attached to an inertial element and tension is applied to the other end the strands are caused to untwist and the inertial element caused to rotate.

Abstract: A dynamic energy converter is provided as an exercise and amusement apparatus. The physics of a torsion pendulum and button and string child's toy are employed in to provide a novel mode of exercise. An inertial component of significant mass and diameter has a flexible strand or cord of significant strength threaded through holes in the inertial component and formed into a closed loop. A means for gripping the ends of the loop of cord so that the inertial element is midway between the gripping means is attached to the loop. The user of the apparatus twirls the inertial element to create twists in the cord and then applies opposed tension to the cord to cause the inertial component to rotate as the twists in the cord unwind. The inertia of the inertial element under controlled tension causes the cord to unwind and then wind in the opposite direction until increased tension in the cord causes the inertial component to rotate and accelerate in the opposite direction.

Abstract: A dynamic energy converter is provided as an exercise and amusement apparatus. The physics of a torsion pendulum and button and string child's toy are employed in to provide a novel mode of exercise. An inertial component of significant mass and diameter has a flexible strand or cord of significant strength threaded through holes in the inertial component and formed into a closed loop. A means for gripping the ends of the loop of cord so that the inertial element is midway between the gripping means is attached to the loop. The user of the apparatus twirls the inertial element to create twists in the cord and then applies opposed tension to the cord to cause the inertial component to rotate as the twists in the cord unwind. The inertia of the inertial element under controlled tension causes the cord to unwind and then wind in the opposite direction until increased tension in the cord causes the inertial component to rotate and accelerate in the opposite direction.