(19)

(11)

EP 1 639 327 A2

(12)

(88) Date of publication A3: 28.10.2004 (43) Date of publication: 29.03.2006 Bulletin 2006/13 (21) Application number: 04705119.8 (22) Date of filing: 26.01.2004

(51) International Patent Classification (IPC):  G01G 19/56(1968.09) (86) International application number: PCT/GB2004/000316 (87) International publication number: WO 2004/065916 (05.08.2004 Gazette 2004/32)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR (30) Priority: 24.01.2003 GB 0301630 25.06.2003 GB 0314720 (71) Applicant: Wright, Hugh Charles Armstrong Fenham, Newcastle-upon-Tyne NE4 9RR (GB)	(72) Inventor: Wright, Hugh Charles Armstrong Fenham, Newcastle-upon-Tyne NE4 9RR (GB) (74) Representative: Elsworth, Dominic Stephen  Hargreaves Elsworth Suite 14 i6, Charlotte Square Newcastle-upon Tyne, NE1 4XF Newcastle-upon Tyne, NE1 4XF (GB)