(19)

(11)

EP 0 203 132 A1

(12)

(43) Date of publication: 03.12.1986 Bulletin 1986/49 (21) Application number: 85905859.0 (22) Date of filing: 21.11.1985

(51) International Patent Classification (IPC):  G08B 3/ 10( . ) H03G 3/ 34( . ) H03G 3/ 32( . ) H04M 1/ 82( . ) (86) International application number: PCT/GB1985/000536 (87) International publication number: WO 1986/003353 (05.06.1986 Gazette 1986/12)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 23.11.1984 GB 19840029664 09.10.1985 GB 19850024934 (71) Applicants: WARRACK, Andrew Bushey Herfordshire (GB) LAMBE, John Charles Shilton Oxfordshire (GB)	(72) Inventors: WARRACK, Andrew Bushey Herfordshire (GB) LAMBE, John Charles Shilton Oxfordshire (GB)