Specification of Julius Jeffreys : respirators.

  • Jeffreys, Julius, 1800-1877.
Date:
1857
Catalogue details

Licence: Public Domain Mark

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

    5/10 (page 3)
    Jeffreys Improvements in Respirators. of much importance to the comfort of the wearer. In the new arrangement both the acting portion, Figure IV., and the case which receives it, Figure V., and carries the fittings, are flexible in their entire length, so that they may be bent to suit the form of any mouth and jaws, even when the whole is fixed 5 together. This combination of flexibility, both of the case and the instrument or operative part with seperability from each other, I claim as new and impor¬ tant ; and, as any number of packets or layers can be employed, this is also a respirator of all powers in . one. My next improvement is the construction of a nasal respirator, an instru- 10 ment adapted for the nostrils only. Though hitherto not attempted, this has been found practicable in the following construction:—Figures VI. and VII. are a case for the nose, of flexible material, so formed as to apply itself well by the margin a, a, a, a, padded with velvet or leather, &c. to the upper and outside surface of the nose, where it is supported by the nasal bones ; and at 15 the sides it applies itself to the cheek, near the nose, being spread out below so as not to touch the soft alse of the nose, lest they should be compressed at all, to the obstruction of the passage of air into the nostrils. This nose cap is made as little pervious to air as possible, and its lower margin terminates in a firm frame or edge of a semi-oval form C, C, &c., Figures VI. and VIII., but 20 concave behind C\ VII. and VIII., to fit the middle of the upper jaw, below the nose. This frame is made deep enough as at C1, Figure VIII., to carry any requisite number of the metallic or other operative layers, which, when heaped together, Figure IX., are kept a minute distance from each other by a thickened margin round each. These layers or plates exactly fit into 05 the framed margin C, C, C, Figure VIII., and are kept in by the fine cord/,/, buttoned on h, h. b, 6, b, Figures VI., VII., and VIII., are ribbons with elastic bands, which are tied round the head to give support to the respirator. When the nasal respirator is on, a person breathes in and out through the apertures or perforations in the operative part of the instrument, SO the breath passing through the several layers successively. The nose cap so well fits the parts to which its margin is applied as to admit no leakage of air, and it is made expansible to fit all forms of visage. In this instrument the power is likewise variable in any degree desired on the same principle as in the oral of all powers above described. One or more layers of porous 35 woollen or other fabric may be introduced between some of the metallic layers, having been soaked previously in a medicated solution, by the evaporation of which an effect may be produced upon the nerves of the membrane of the nose and throat.