John C. RICHARDSON, Appellant, v. WALSH CONSTRUCTION COMPANY, Morrison-Knudsen Company, Inc., Henry J. Kaiser Company and Perini Corporation. No. 15888.United States Court of Appeals, Third Circuit.Argued November 4, 1966. Decided December 5, 1966. Appeal from the United States District Court for the Western District of Pennsylvania; Louis Rosenberg, Judge. Hymen Schlesinger, Pittsburgh, Pa., for appellant. […]