(19)

(11)

EP 0 829 073 A1

(12)

(43) Date of publication: 18.03.1998 Bulletin 1998/12 (21) Application number: 96919952.0 (22) Date of filing: 03.06.1996

(51) International Patent Classification (IPC):  G08B 13/ 196( . ) G08B 15/ 00( . ) (86) International application number: PCT/GB1996/001307 (87) International publication number: WO 1996/038828 (05.12.1996 Gazette 1997/01)

(84) Designated Contracting States: DE ES FR GB IE IT (30) Priority: 02.06.1995 GB 19950011144 (71) Applicant: Jon David Limited Liverpool L2 6PY (GB)	(72) Inventor: DEMPSEY, Maurice Hewswall, Wirral, L60 4RS (GB) (74) Representative: W.P. THOMPSON & CO.  Coopers Building, Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)