The Equivalence of Games with Perfect Recall

A bus bar of laminar construction useful for power distribution systems and the like is disclosed which features an improved contact pin arrangement for providing input, output, and ground connections to the bus bar, together with an improved method of fabricating the bus bar and installing the contact pins or posts. The bus bar comprises a plurality of metallic conductors in sheet form separated by insulator films in a laminated structure, alternate conductor sheets serving as ground planes with the power signal conductors interleaved between the ground conductors. The conductor sheet - insulator film sandwich is clamped between cover members of phenolic or glass epoxy and the whole is encapsulated in a semi-rigid epoxy which extends between and under the conductor sheets at one end thereof. Finally, a series of holes is drilled through the laminated structure thus formed and particularly through the conductor sheets and semi-rigid epoxy and metallic pins or posts are inserted under force into these holes to effect a mechanical and electrical connection of high quality with the separate signal conductors and ground conductors for external access to the elements of the bus bar. The post or pin is larger in cross-sectional area than the hole and at least one cross-sectional dimension of the pin through the center of the cross-section is larger than the diameter of the hole. A bead of an epoxy adhesive is placed over the hole prior to pin insertion. Insertion of the pin then carries only so much epoxy therewith as will go into the hole to provide additional adhesion of pin to bus bar as well as hermetic seal.