Improvements in or relating to mountings or attachments for telephone receivers

摘要

213,519. Brookes, H. J. March 15, 1923. Telephones. - Headphones are provided with internally projecting grip devices in the form of small flexible suction cups g mounted on the headband a. Each cup may be attached to a bearing sleeve d by means of a screw e and nut h1. The frictional sliding adjustment devices for the earpieces b shown in the Figure form the subjectmatter of Specification 211,722.