(19)

(11)

EP 0 253 868 A1

(12)

(43) Date of publication: 27.01.1988 Bulletin 1988/04 (21) Application number: 87900860.0 (22) Date of filing: 23.01.1987

(51) International Patent Classification (IPC):  G07C 9/ 00( . ) (86) International application number: PCT/GB1987/000043 (87) International publication number: WO 1987/004482 (30.07.1987 Gazette 1987/17)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 23.01.1986 GB 19860001585 (71) Applicants: BLOCH, Maurice London, N3 1ES (GB) HASKELL, Harry Ainsworth Staines Middlesex (GB)	(72) Inventors: BLOCH, Maurice London, N3 1ES (GB) HASKELL, Harry Ainsworth Staines Middlesex (GB)