(19)

(11)

EP 0 169 215 A1

(12)

(43) Date of publication: 29.01.1986 Bulletin 1986/05 (21) Application number: 85900487.0 (22) Date of filing: 21.12.1984

(51) International Patent Classification (IPC):  H04R 1/ 02( . ) H04R 1/ 28( . ) H04R 3/ 14( . ) H04R 1/ 26( . ) H04R 1/ 32( . ) (86) International application number: PCT/GB1984/000449 (87) International publication number: WO 1985/003186 (18.07.1985 Gazette 1985/16)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 06.01.1984 CA 19840444842 (71) Applicants: WRIGHT, William Michael Dayton Richmond Hill, Ontario L4C 2B9 (CA) ASQUITH, Anthony Waterloo, Ontario N2T 1B7 (CA)	(72) Inventor: WRIGHT, William Michael Dayton Richmond Hill, Ontario L4C 2B9 (CA) (74) Representative: Hayward, Denis Edward Peter  Lloyd Wise, Tregear & Co. Norman House 105-109 Strand London WC2R 0AE London WC2R 0AE (GB)