No. 8759. Argued January 11, 1963. Decided May 28, 1963. Melvin J. Welles, Attorney, National Labor Relations Board (Stuart Rothman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, and Lee M. Modjeska, Attorney, National Labor Relations Board, on brief), for petitioner. William B. Devaney, Washington, D.C. (Charles G. Williamson, Jr., and Steptoe Johnson, Washington, D.C., on brief), for respondent. Before SOBELOFF, Chief Judge, and BRYAN