Specification of George Harman Barth : apparatus for administering gases for curative purposes.

  • Barth, George Harman.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Harman Barth : apparatus for administering gases for curative purposes. Source: Wellcome Collection.

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    Barth's Improvements in Administering Gases for Curative Purposes. core of the tank, and there delivers its gas into the gas holder just above the water line; at P is a union joint for connecting the bottle E with the tube pro¬ ceeding to the top of the core. The guide rod F is divided, so as to represent pints of capacity of the gas holder, and the proportions of gas and air are thereby easily mixed when required. The gas holder C has properly secured 5. to its top two air-tight cocks K & M. The cock K is to admit the quantity of air required to dilute the oxygen or other gas, and the cock M communicates with a flexible tube and glass mouthpiece indicated by the letter II. The mahogany stand D has fittings to place the bottle E in, and the tank and gas holder are fastened to it by turn buttons for the convenience of removal; the stand D is also mounted on castors for the convenience of removal. The bottle E being charged with compressed gas, and the tank A properly filled with water, the mixing and inhaling of the gas by this apparatus is as follows :—The cock K is opened, and the gas holder C is gently drawn up by means of the ring at the top of the guide rod F until the gas holder is charged 15; with the quantity of air required for diluting the gas, as shewn by the division at the under side of the bridge piece G; the cock K is then shut and the stop cock N slightly opened, thus admitting to the gas holder a small quantity of gas out of the bottle E. When the graduated guide rod F shows that sufficient gas has been admitted the stop cock N is shut, and the apparatus is 20 ready for the patient to inhale. To inhale, the lungs are exhausted of air by making a strong expiration; the glass tube is then taken into the mouth, and the inhaling cock M is opened, and the lungs filled by inspiration with the gas from the gas holder. The cock is then shut, the mouth is removed from the glass tube, and an expiration is made; then the gas is inhaled as before, 25 and then exhaled, and so on alternately until the prescribed quantity has been consumed by the patient. When the gas in the bottle E has been all used the gas holder and tank are taken off, as if in one piece, by moving the turn buttons from the plates and lifting it by the handles; the empty bottle is then removed by unscrewing the 30 union joint P, and a full one is put in its place. The gasometer may consist of a bag of flexible material, instead of the gas holder and tank, as herein¬ before described, so placed in a box or drawer connected with the vessel of condensed gas that a stop or pointer outside the box or drawer shall indicate, on a suitable scale, the amount of gas or air in the gasometer at any time, so 35 that the patient may measure and mix his proportion of gas and air in a manner analogous to that herein-before described for charging the gas holder with gas. Having now described and particularly ascertained the nature of my said
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