Nos. 22088, 22568, 22569. Argued October 21, 1969. Decided November 13. 1969. Certiorari Denied March 23, 1970. See 90 S.Ct. 1120. Mr. Jacob Sheinkman, New York City, for petitioner in No. 22,088. Mr. Carmack Cochran, Nashville, Tenn., for petitioner in Nos. 22,568 and 22,569 and intervenor McEwen Mfg. Co. in No. 22,088. Mr. Seth D. Rosen, Attorney, National Labor Relations Board, of the bar of the Supreme Court of Connecticut, pro hac vice, by special leave of court, for respondent. Messrs. Arnold