Jacobs vowed to fight AMF’s takeover defenses.

Minneapolis financier Irwin L. Jacobs, who is trying to gain control of the sporting-goods concern, said he would go to court to challenge AMF’s anti-takeover measures. He also criticized AMF management’s decision to double severance pay for top officers in the event of a takeover. The AMF board has called Jacobs’ $23-a-share tender offer for 43% of the company’s outstanding shares inadequate. Jacobs currently holds a 7.5% stake in the firm.