Improvements in or relating to electric aural apparatus more especially for use by deaf persons

摘要

166,610. Brown, S. G. Oct. 25, 1920. Receivers for deaf persons.-Sound is communicated to the skull or teeth by a stud E on a stiff reed C vibrated by a magnetic system consisting of a. permanent horseshoe magnet B with coil F wound on a bridge pole-piece b, which is cut away to form a hole just below the reed. The stud E may be mounted at an intermediate point of the reed C so as to project through the cover a.