(19)

(11)

EP 0 674 742 A1

(12)

(43) Date of publication: 04.10.1995 Bulletin 1995/40 (21) Application number: 94902054.0 (22) Date of filing: 10.12.1993

(51) International Patent Classification (IPC):  E05G 1/ 00( . ) E05G 7/ 00( . ) G07F 19/ 00( . ) (86) International application number: PCT/GB1993/002524 (87) International publication number: WO 1994/013918 (23.06.1994 Gazette 1994/14)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 15.12.1992 GB 19920026096 13.05.1993 GB 19930009878 (71) Applicant: KITCHIN ENGINEERING LIMITED Chesterfield S41 7UP (GB)	(72) Inventor: WHITFIELD, John Doncaster DN4 7BP (GB) (74) Representative: Houghton, David, et al  Hulse & Co. Eagle Star House, Carver Street Sheffield S1 4FP Sheffield S1 4FP (GB)