(19)

(11)

EP 0 653 097 A1

(12)

(43) Date of publication: 17.05.1995 Bulletin 1995/20 (21) Application number: 94915843.0 (22) Date of filing: 20.04.1994

(51) International Patent Classification (IPC):  H01F 7/ 06( . ) H01F 7/ 121( . ) H01F 7/ 14( . ) H01F 7/ 08( . ) H01F 7/ 13( . ) H01F 7/ 16( . ) (86) International application number: PCT/US1994/004372 (87) International publication number: WO 1994/028559 (08.12.1994 Gazette 1994/27)

(84) Designated Contracting States: BE DE FR (30) Priority: 01.06.1993 US 19930069797 (71) Applicant: CATERPILLAR INC. Peoria Illinois 61629-6490 (US)	(72) Inventors: GOLOFF, C., Nickolas Secor, IL 61771 (US) ROLFFS, Rodney, L. East Peoria, IL 61611-1559 (US) (74) Representative: Jackson, Peter Arthur, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)