Specification of George Harman Barth : inhaling apparatus.

  • Barth, George Harman.
Date:
1869
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Harman Barth : inhaling apparatus. Source: Wellcome Collection.

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    Barth's Improved Inhaling Apparatus for Medicinal JPurposes. may be fitted with an interior core if desired in the customary way. The gasholder is fitted with a' rod scaled to measure the quantity of gas used; it is also provided with counterpoise weights to regulate its weight. The gas or vapour can be supplied to the gasholder from any receptacle containing it through a proper entrance cock at the ordinary 5 tension and density; or it may be compressed into a strong metal receptacle and admitted to the gasholder therefrom, or it can be supplied in a liquid form or even in a solidified form, if the gas will assume these or one of these forms. The purification is effected by causing the gas or vapour to pass through nets, 10 diaphragms, or partitions of cotton, wool, hemp, or any other suitable material, which are placed in the interior of the gasholder in such way that when gas is admitted it must pass through the nets or partitions before it can be withdrawn from the gasholder. In order to remove impurities from the gas or vapour the nets, diaphgrams, or 15 partitions are saturated with such proper chymical solution as will absorb, remove, or neutralize the impurity. As an instance, I charge the nets to remove carbonic acid gas with a solution of caustic potash or with caustic lime water. The solution may be contained in a vessel placed on the top of the core when the instrument is made with a core, 20 or in such situation that whensoever the gasholder is empty and descends the nets or partitions are moistened by the solution, and when it ascends they ascend, and being charged with the solution purify the gas, which must pass through the interstitial spaces of the nets, diaphragms, or partitions before it can be withdrawn from the gasholder. 25 A principal feature in this my Invention is that the gasholder washes or cleans itself by descending into and remaining in water when not in use, thus preventing the danger of diseased emanations being trans¬ mitted to one person who may inhale after another person from air-tight bags which cannot be cleansed. It also enables the operator to measure 30 the quantity of gas used by merely inspecting the scale rods, and when it is desired to have the gas purified or made otherwise capable of being re-breathed and thus economised, it perfectly and conveniently accomplishes the desired purpose. Any form of tube and mouth piece, face piece, or inhaling apparatus 35 can be applied to this my gasholder. I do not select any especial kind, but leave it to the discretion of those who use the apparatus. By gas or gases I mean any kind of gas, and by vapour any kind of