(19)

(11)

EP 1 809 954 A1

(12)

(43) Date of publication: 25.07.2007 Bulletin 2007/30 (21) Application number: 05787005.7 (22) Date of filing: 27.09.2005

(51) International Patent Classification (IPC):  F25B 17/08(2006.01) F25D 19/00(2006.01) (86) International application number: PCT/GB2005/003712 (87) International publication number: WO 2006/051251 (18.05.2006 Gazette 2006/20)

(84) Designated Contracting States: CH DE FR GB IT LI (30) Priority: 09.11.2004 GB 0424725 (71) Applicant: Oxford Instruments Superconductivity Limited Witney, Oxon OX8 1TL (GB)	(72) Inventors: NOONAN, Paul Geoffrey Kidlington, Oxfordshire OX5 3JR (GB) MIKHEEV, Vladimir Bicester, Oxon OX26 2XN (GB) (74) Representative: Skone James, Robert Edmund  Gill Jennings & Every LLP Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)