(19)

(11)

EP 0 073 762 A1

(12)

(43) Date of publication: 16.03.1983 Bulletin 1983/11 (21) Application number: 81901750.0 (22) Date of filing: 17.03.1981

(51) International Patent Classification (IPC):  F23N 1/ 10( . ) (86) International application number: PCT/US1981/000367 (87) International publication number: WO 1982/003284 (30.09.1982 Gazette 1982/23)

(84) Designated Contracting States: CH DE FR GB LI (71) Applicant: THE G.C. BROACH COMPANY, INC. Tulsa, OK 74145 (US)	(72) Inventor: BROACH, George C. Tulsa, OK 74136 (US) (74) Representative: Gasser, François W.  Patentanwalt und Lizenzberater, Reiterstrasse 5A CH-3013 Bern CH-3013 Bern (CH)