(19)

(11)

EP 0 152 420 A1

(12)

(43) Date of publication: 28.08.1985 Bulletin 1985/35 (21) Application number: 84902926.0 (22) Date of filing: 24.07.1984

(51) International Patent Classification (IPC):  F16G 11/ 12( . ) (86) International application number: PCT/GB1984/000260 (87) International publication number: WO 1985/000644 (14.02.1985 Gazette 1985/04)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 29.07.1983 GB 19830020485 (71) Applicant: Rovert Controls (Cheltenham) Limited Cheltenham Gloucestershire GL51 8HF (GB)	(72) Inventor: CHECKLEY, Peter, Edward Upton-on-Severn Worcestershire WR8 OQQ (GB) (74) Representative: Dunlop, Brian Kenneth Charles, et al  c/o Wynne-Jones, Lainé & James 22 Rodney Road Cheltenham Gloucestershire GL50 1JJ Cheltenham Gloucestershire GL50 1JJ (GB)