(19)

(11)

EP 0 154 621 A1

(12)

(43) Date of publication: 18.09.1985 Bulletin 1985/38 (21) Application number: 83903037.0 (22) Date of filing: 29.08.1983

(51) International Patent Classification (IPC):  H05B 3/ 20( . ) H05B 3/ 34( . ) H05B 3/ 06( . ) (86) International application number: PCT/US1983/001319 (87) International publication number: WO 1985/001178 (14.03.1985 Gazette 1985/07)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicants: HULETT, John G. Dallas, TX 75234 (US) ROTHENBERGER, Robert C. Dallas, TX 75234 (US)	(72) Inventors: HULETT, John G. Dallas, TX 75234 (US) ROTHENBERGER, Robert C. Dallas, TX 75234 (US) (74) Representative: Patentanwälte Grünecker, Kinkeldey, Stockmair & Partner  Maximilianstrasse 58 D-80538 München D-80538 München (DE)