Specification of Julius Jeffreys : respirators.

  • Julius Jeffreys
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Julius Jeffreys : respirators. Source: Wellcome Collection.

    5/10 (page 3)
    Jeffreys Improvements in Preventing or Removing Affections of the Chest. Venetian front on it. s, s is the section of the packet of gold wire skeins forming the body of the instrument; f g, g, f the drapery; h, the left-hand ring ; i, i, the lip tucks. My second Invention consists in a modification of the metal work or 5 operating part itself of the instrument. In this form the metal work does not consist of laminae of wire work, or of perforated plates, through which the currents of the breath travel transversely or across the plane of the layers, passing through the several layers in succession, as in the usual instruments, and as seen in the direction of the arrows, Figure VI., but the metal work in 10 this form consists of plates or rods or tubes, placed parallel and near to each other; and the currents pass in and out longitudinally in the direction of and parallel to the metallic surfaces, as seen by the arrows, Figure I. If plates are employed, as in the Figures, the currents alternate lengthways through the fissures between them ; if solid rods or wires, the currents pass over their 15 surfaces lengthways along the interstices left between them; and if hollow rods or tubes are used, the currents travel both through them and along their outer surfaces; in all cases the same channels sbeing employed for the passage of both the exhaled and the inhaled breadth. Figures I., II., and III., exhibit this longitudinal respirator. 20 Figure I. is a vertical section down the middle, dividing the instrument across, along the line d, e, a, b, Figure II. Figure II. is a view of the concave surface, or that which is applied to the face. Figure III. is a view of the instrument from below, looking upon the 25 edgeh,h, Figures I. and II. The letters denote the same parts in all the Figures, <z, a, a, a, are the concentric layers of thin metal forming the instrument, placed a minute distance apart and kept at that distance by embossing the plates, so as to produce projecting points or edges, or by placing wires or cords between them, a, b is the outermost plate extending in the 30 middle an inch above the rest, and convex at its upper edge c, c, c, c, while all the rest are curved downwards along their upper edges, as seen at g, a, g, Figure II., so as to meet the back plate at their upper corners i, i, and to form the mouth piece i, g, a, g, i, c, c, c, c. A soft roll of velvet or leather c, c, c, c, lines the upper edge and rests on the upper lip. The surface 35 g, a, <7, e, e, e, is covered with soft cloth or leather, and rests against the lower lip and chin. The convex front of the instrument is covered with silk, cloth, or leather*#, d, d, Figures I. and III. /,/,/,/, &c., are wires or threads binding the plates together. The instrument is suspended to the face by attachments