Nos. 72-1186, 72-1195. Argued January 22, 1973. Decided March 16, 1973. Rehearing Denied in No. 72-1186 April 23, 1973. As amended April 25, 1973. Francis Heisler, Mark L. Schwartzman, Robert C. Claus, John P. Jacoby, Chicago, Ill., for petitioner. Marcel Mallet-Prevost, Asst. Gen. Counsel, John D. Burgoyne, Atty., N.L.R.B., Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before CASTLE, Senior Circuit Judge, and FAIRCHILD and CUMMINGS, Circuit Judges