(19)

(11)

EP 0 162 844 A1

(12)

(43) Date of publication: 04.12.1985 Bulletin 1985/49 (21) Application number: 84900524.0 (22) Date of filing: 20.01.1984

(51) International Patent Classification (IPC):  E05B 55/ 00( . ) E05B 17/ 20( . ) E05B 15/ 00( . ) (86) International application number: PCT/GB1984/000012 (87) International publication number: WO 1984/002945 (02.08.1984 Gazette 1984/18)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 21.01.1983 GB 19830001608 28.02.1983 GB 19830005429 (71) Applicant: SPHINX PATENT HOLDINGS LIMITED Great West Road Brentford Middlesex (GB)	(72) Inventor: MORGAN, Laurence, George Thorpe, Egham Surrey (GB) (74) Representative: Godwin, Edgar James, et al  MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)