| abstract |
Means in the shape of a large ball for competitive activities, for games and for advertising purposes, said ball being composed of segments of thin plastic material welded together along their sides and to disks at the top amid bottom, said balls being made to roll, pressed by human energy, towards a winning-post at the end of a city route, or over a flat snow-covered surface, or by swimmers in water, or allowed to roll freely down a sloping road. In one type of execution, inside the ball is an electrical battery-driven propelling device, or some other type, remote-controlled from the outside by means of electromagnetic waves. |