No. 35, Docket 23550. Argued October 5, 1955. Decided November 3, 1955. Samuel M. Singer, Atty., N.L.R.B., Washington, D.C. (Theophil C. Kammholz, Gen. Counsel, David P. Findling, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and William J. Avrutis, Atty., N.L.R.B., Washington, D.C., on the brief), for petitioner. David I. Ashe, New York City (Ashe Rifkin, New York City, on the brief), for respondents. Before CLARK, Chief Judge, and MEDINA and LUMBARD, Circuit Judges. CLARK,