Foil track

摘要

A board for a board game bears on its surface pairs of electrical contacts -h and h+ which on being bridged by a suitable conductive playing piece complete an electrical surface. The contacts are rivets which join the board surface a to a circuit board b which is a sheet of cardboard covered with metal foil which has been cut to shape so that it comprises trackways f and g. The electrical currents can drive sound and light-emitting circuits.