(19)

(11)

EP 0 591 187 A1

(12)

(43) Date of publication: 13.04.1994 Bulletin 1994/15 (21) Application number: 91913244.0 (22) Date of filing: 19.07.1991

(51) International Patent Classification (IPC):  F16F 15/ 03( . ) H02K 33/ 00( . ) H01F 7/ 16( . ) H02K 33/ 06( . ) (86) International application number: PCT/GB1991/001211 (87) International publication number: WO 1992/001876 (06.02.1992 Gazette 1992/04)

(84) Designated Contracting States: BE DE DK ES FR GB IT NL SE (30) Priority: 20.07.1990 GB 19900015983 (71) Applicant: ACTIVE NOISE AND VIBRATION TECHNOLOGIES INC. Phoenix, AZ 85040 (US)	(72) Inventors: JONES, Owen Essex C07 8BW (GB) TRINDER, Michael, Charles, John Rymer Essex CO7 6QX (GB) (74) Representative: Read, Matthew Charles, et al  Venner Shipley & Co. 20 Little Britain London EC1A 7DH London EC1A 7DH (GB)