(19)

(11)

EP 0 093 708 A1

(12)

(43) Date of publication: 16.11.1983 Bulletin 1983/46 (21) Application number: 81903236.0 (22) Date of filing: 17.11.1981

(51) International Patent Classification (IPC):  A01B 33/ 02( . ) A01B 33/ 14( . ) (86) International application number: PCT/GB1981/000246 (87) International publication number: WO 1983/001722 (26.05.1983 Gazette 1983/13)

(84) Designated Contracting States: FR GB (71) Applicant: BROWN, Benjamin Marriott Leicestershire LE14 4LA (GB)	(72) Inventor: BROWN, Benjamin Marriott Leicestershire LE14 4LA (GB)