No. 17058. Argued March 14, 1963. Decided November 14, 1963. Mr. George Kaufmann, Washington, D.C., with whom Messrs. Gerhard P. Van Arkel, Washington, D.C., and Robert A. Wilson, Cincinnati, Ohio, were on the brief, for petitioners. Mr. Norton J. Come, Asst. Gen. Counsel, N.L.R.B., with whom Messrs. Stuart Rothman, Gen. Counsel at the time the brief was filed, Dominick L. Manoli, Associate Gen. Counsel, and Marcel Mallet-Prevost, Asst. Gen. Counsel, N.L.R.B., were on the brief, for respondent. Before