No. 23342. Argued June 12, 1970. Decided July 29, 1970. Mr. Patrick C. O'Donoghue, Washington, D.C., with whom Mr. Martin F. O'Donoghue, Washington, D.C., was on the brief, for petitioner. Mr. Ian D. Lanoff, Atty., National Labor Relations Board, of the bar of the Supreme Court of Illinois, pro hac vice by special leave of court, with whom Messrs. Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, and Glen M. Bendixsen, Atty