(19)

(11)

EP 0 077 324 A1

(12)

(43) Date of publication: 27.04.1983 Bulletin 1983/17 (21) Application number: 81901632.0 (22) Date of filing: 28.04.1981

(51) International Patent Classification (IPC):  H04R 1/ 28( . ) (86) International application number: PCT/US1981/000554 (87) International publication number: WO 1982/003961 (11.11.1982 Gazette 1982/27)

(84) Designated Contracting States: CH DE FR GB LI SE (71) Applicant: Gale, George, A. Chicago, IL 60619 (US)	(72) Inventor: Gale, George, A. Chicago, IL 60619 (US)