No. 16901. Argued September 27, 1962. Decided November 15, 1962. Mr. Bernard Dunau, Washington, D.C., with whom Mr. Plato E. Papps, Washington, D.C., was on the brief, for petitioner. Mr. Melvin J. Welles, Attorney, National Labor Relations Board, of the bar of the Court of Appeals of New York, pro hac vice, by special leave of court, with whom Messrs. Stuart Rothman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, National Labor Relations