No. 17873. May 21, 1968. John C. O'Meara, Detroit, Mich., for petitioner; Daniel J. Tindall, Jr., Detroit, Mich., on brief; Dickinson, Wright, McKean Cudlip, Detroit, Mich., of counsel. Arthur A. Horowitz, Atty., N.L.R.B., Washington, D.C., for respondent; Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Paul J. Spielberg, Atty., N.L.R.B., Washington, D.C., on brief. Before O'SULLIVAN and PHILLIPS, Circuit Judges, and CECIL, Senior