Specification of George Haseltine : inhaling apparatus.

  • Haseltine, George.
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Haseltine : inhaling apparatus. Source: Wellcome Collection.

    6/12 (page 4)
    Specification. Haseltine's Improved Inhaling Apparatus. upper end of this tube being bent, as seen in Figure 2, to receive the fumes of the muriatic acid in the vessel c placed in a cavity in the stopper B; the depth of the said cavity is such that only the upper edge of this vessel will project above the upper surface of the stopper, thus, as the air is exhausted from the receptacle A by the act of inhaling, the 5 fumes of the acid are drawn down the inlet tube b3 and passing through the medicated liquid containing a small quantity of concentrated aqua ammonia combine therewith and form the vapor to be inhaled. To the lower end of the exhaust passage a is fitted a metallic casing q con¬ taining a valve d which opens upwardly to allow of the passage of the 10 vapor to be inhaled, but will instantly close and shut off communication should any one blow or breathe into the exhaust tube, thus preventing any pressure of air upon the surface of the medicated liquid and its consequent rise up the inlet tube into the acid vessel c; this mixture of the acid and medicated liquid destroys the power of generating vapor, 15 and necessitates the emptying of the apparatus and a new supply of the medicated liquid and acid which is frequently required in inhalers as heretofore constructed, and which is a great objection to their use. The valve d also prevents the evaporation of the volatile portion of the medicated liquid which would occur if no valve were employed. 20 By embedding the acid receptacle within the stopper, as above described, it is effectually protected from breakage, which is not the case where it is placed inside or outside the main receptacle away from the stopper. When it is desired to pack the inhaler in a trunk or valise for travelling, it is not necessary to discharge the medicated liquid and the 25 acid, but merely to raise the inlet tube b and disconnect it from the acid vessel, which must then be tightly closed by a stopper e9 Figure 3. The inlet tube is now turned around until its end f is over the exhaust passage a (from which the exhaust tube has been previously removed), when it is forced down, as seen in Figure 5, the portion 10 resting in a 30 groove h formed in the stopper B, and the end f fitting into and tightly closing the exhaust passage a. The escape of any of the medicated liquid from the main receptacle A through the inlet tube b or exhaust passage a is thus effectually prevented and the inhaler charged ready for use, can consequently be packed in a trunk or valise without liability 35 to leakage. It will be seen that the groove h allows the portion 10 of the inlet tube to be forced down flush, or nearly so, with the upper