Improvements in or connected with stethoscopes / [James Ernest Arnold].

  • Arnold, James Ernest.
Date:
1898
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in or connected with stethoscopes / [James Ernest Arnold]. Source: Wellcome Collection.

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    N° 7378 A.D. 1897 Date of Application, 22nd Mar., 1897 Complete Specification Left, 22nd Dec., 1897—Accepted, 5th Feb., 1898 PROVISIONAL SPECIFICATION. Improvements in or connected with Stethoscopes. I, James Ernest Arnold, of 31, West Smithfield, in the City and County of London, Surgical Instrument Maker, do hereby declare the nature of this invention to be as follows : — My invention refers to the construction of stethoscopes whereby they are 5 rendered more sensitive to or for conveying sounds to the ears clearly and dis¬ tinctly from the body of the person examined than heretofore, and with this object in viewr I arrange within the orifice of the trumpet shaped hollow cylindrical end, which is placed against the body of the person to be examined, a conically shaped cap or vessel, the apex of the cone being in communication with the inside of the 10 cap or vessel, and the branch tubes, to which the ordinary rubber tubes leading to the ear branches are connected. The top of the cone should be sunk in or be below the top or outer edge of the trumpet mouth, and the tube leading therefrom should pass through the trumpet, down the outside thereof, and beneath same to the junction of the ear tubes below the trumpet shaped mouth containing the cone 15 aforesaid. The base of the cone is supported by a ring connected near the base of the trumpet mouth, and thus there is an air chamber formed within the cone itself, and the base of the cylindrical stem by or through which the sound waves pass or are conveyed from the body of the person under examination, to the inside of the underside of the cone and thence through the ordinary connecting tubes to 20 the examiner’s ears. Rated this 22nd day of March 1897. BREWER & SON, London and Leeds, Agents for the Applicant. COMPLETE SPECIFICATION. 25 Improvements in or connected with Stethoscopes. I, James Ernest Arnold, of 31, West Smithfield, in the City and County cf London, Surgical Instrument Maker, do hereby declare the nature of this invention and in what^inanner the same is to be performed, to be particularly described and ascertained in and by the following statement: 30 My invention refers to the construction of stethoscopes whereby they are rendered more sensitive to or for conveying sounds to the ears clearly and distinctly from the body of the person examined than heretofore, and with this object in view, within the orifice of the trumpet shaped hollow cylindrical end, which is placed against the body of the person to be examined I arrange a conically shaped cap [Price 8^.]