(19)

(11)

EP 0 834 209 A1

(12)

(43) Date of publication: 08.04.1998 Bulletin 1998/15 (21) Application number: 96914315.0 (22) Date of filing: 20.05.1996

(51) International Patent Classification (IPC):  G08B 17/ 06( . ) H02H 3/ 08( . ) (86) International application number: PCT/GB1996/001201 (87) International publication number: WO 1996/037025 (21.11.1996 Gazette 1996/51)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV SI (30) Priority: 19.05.1995 GB 19950010173 (71) Applicant: Garrard, David Eardley London W1H 3AX (GB)	(72) Inventor: Garrard, David Eardley London W1H 3AX (GB) (74) Representative: Abnett, Richard Charles  REDDIE & GROSE 16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)