Westinghouse Air Brake to Buy Rockwell Unit

Westinghouse Air Brake Co. agreed to buy Rockwell International Corp.’s railroad electronics division for $80 million in a deal that would enable it to add new train monitoring and communications devices to its product line. Wilmerding, Pa.-based Westinghouse Air Brake is one of North America’s largest makers of locomotive equipment. Costa Mesa-based Rockwell is shedding some businesses, including its semiconductor unit, as it concentrates on industrial automation, avionics and communications. On the New York Stock Exchange, Rockwell rose 94 cents to close at $37.94; Westinghouse Air Brake rose $1.06 to close at $21.88.