(19)

(11)

EP 0 215 053 A1

(12)

(43) Date of publication: 25.03.1987 Bulletin 1987/13 (21) Application number: 86901597.0 (22) Date of filing: 10.02.1986

(51) International Patent Classification (IPC):  G05D 16/ 18( . ) (86) International application number: PCT/US1986/000277 (87) International publication number: WO 1986/005012 (28.08.1986 Gazette 1986/19)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 19.02.1985 US 19850702465 (71) Applicant: MIZER CONTROLS, INC. Shreveport, LA 71101 (US)	(72) Inventors: ANDERSON, R., David Wichita Falls, TX 76308 (US) JACOBS, George, S. Wichita Falls, TX 76308 (US) (74) Representative: Godsill, John Kenneth  Haseltine Lake & Co. Hazlitt House 28 Southampton Buildings Chancery Lane London WC2A 1AT London WC2A 1AT (GB)