
    Mueller v. Patterson-Erie Corporation, et al., Appellants.
    Argued April 14, 1975.
    
      William T. Jorden, with him McClure, Dart, Miller & Kelleher, for appellants; Will J. Schaaf, with him Ritchie T. Marsh, and Marsh, Spaeder, Bauer, Spaeder & Schaaf, for appellee.
   Judgment affirmed.  