(19)

(11)

EP 0 448 588 A1

(12)

(43) Date of publication: 02.10.1991 Bulletin 1991/40 (21) Application number: 90900245.0 (22) Date of filing: 12.12.1989

(51) International Patent Classification (IPC):  F21V 23/ 04( . ) (86) International application number: PCT/GB1989/001481 (87) International publication number: WO 1990/007083 (28.06.1990 Gazette 1990/15)

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI LU NL SE (30) Priority: 15.12.1988 GB 19880029226 (71) Applicant: J & G COUGHTRIE LIMITED Hillington, Glasgow G52 4LZ (GB)	(72) Inventor: COUGHTRIE, John Gillies Glasgow G77 6OB (GB) (74) Representative: Naismith, Robert Stewart, et al  CRUIKSHANK & FAIRWEATHER 19 Royal Exchange Square Glasgow, G1 3AE Scotland Glasgow, G1 3AE Scotland (GB)