Man Killed WhileW orking At AmscoA 25-year-old Harvey man was killed Monday afternoon at Amsco Division-Abex corporation in Chicago Heights when a broken grinding wheel struck him in the chest.Lloyd F. Williams of 130 West 14th street died during surgery at St. James hospital in Chicago Heights.A foreman told police that Williams was standing 10 feet from the grinding mill when a 30-inch grinding wheel broke, striking the victim in the chest.