(19)

(11)

EP 0 408 586 A1

(12)

(43) Date of publication: 23.01.1991 Bulletin 1991/04 (21) Application number: 89902953.0 (22) Date of filing: 14.02.1989

(51) International Patent Classification (IPC):  B25H 3/ 04( . ) (86) International application number: PCT/GB1989/000147 (87) International publication number: WO 1989/007512 (24.08.1989 Gazette 1989/20)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 15.02.1988 GB 19880003402 (71) Applicant: WYCHFORD ELECTRONICS LIMITED Bicester, Oxfordshire OX6 ODP (GB)	(72) Inventor: TUTHILL, Roy Douglas Bicester, Oxfordshire OX6 0DP (GB) (74) Representative: Gibson, Stewart Harry, et al  URQUHART-DYKES & LORD, Three Trinity Court, 21-27 Newport Road Cardiff CF2 1AA Cardiff CF2 1AA (GB)