No. 13607. Argued October 31, 1961. Decided February 23, 1962. As Amended April 10, 1962. Warren M. Davison, Washington, D.C. (Stuart Rothman, Gen. Counsel, Dominick L. Manoli, Assoc. Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Allison W. Brown, Jr., Atty., National Labor Relations Board, on the brief), for petitioner. Richard H. Markowitz, Philadelphia, Pa. (Paula R. Markowitz, Wilderman, Markowitz Kirschner, Philadelphia, Pa., on the brief), for respondent. Before McLAUGHLIN, STALEY