(19)

(11)

EP 0 139 713 A1

(12)

(43) Date of publication: 08.05.1985 Bulletin 1985/19 (21) Application number: 84901603.0 (22) Date of filing: 16.04.1984

(51) International Patent Classification (IPC):  G07C 9/ 00( . ) (86) International application number: PCT/GB1984/000128 (87) International publication number: WO 1984/004128 (25.10.1984 Gazette 1984/25)

(84) Designated Contracting States: BE CH DE FR GB LI NL SE (30) Priority: 15.04.1983 GB 19830010222 (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) (74) Representative: Cross, Rupert Edward Blount, et al  BOULT, WADE & TENNANT 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)