(19)

(11)

EP 0 452 486 A1

(12)

(43) Date of publication: 23.10.1991 Bulletin 1991/43 (21) Application number: 91901049.0 (22) Date of filing: 08.11.1990

(51) International Patent Classification (IPC):  A62B 18/ 08( . ) H04R 1/ 02( . ) H04M 1/ 05( . ) H04R 1/ 08( . ) (86) International application number: PCT/US1990/006521 (87) International publication number: WO 1991/007859 (30.05.1991 Gazette 1991/12)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 08.11.1989 US 19890433601 (71) Applicant: ACTRON MANUFATURING COMPANY Cleveland, OH 44102 (US)	(72) Inventors: BAUER, Alfred Parma, OH 44130 (US) DOBBINS, Thomas, A. Cleveland Hts., OH 44118 (US) (74) Representative: Cook, Anthony John, et al  D. YOUNG & CO. 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)