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 Purposes. This Invention is also applicable to other apparatus, especially those in which metal gas holders are used. This my present Invention is for apparatus to economise the use of gas, gases, or vapours by purifying them after being inhaled, and thus enabling them to be re-breathed. I accomplish this result by using a 5 gasholder, which is fitted with weights to counterpoise its weight, and is fitted with an appliance to measure the gas contained therein. The gasholder may be supplied with gas or vapour at the ordinary tension and density, or with gas compressed into a strong receptacle, or in a liquid form, or in a solid form. The purification is effected by placing 10 nets or partitions of cotton, wool, hemp, or other suitable material inside the gasholder, which are saturated with some proper chymical solution, such as solution of caustic potash, and other solutions may be used, so that when the gas or vapour after being inhaled is exhaled into the gas¬ holder it has to pass through the interstices of the nets or partitions, 15 which thus absorb its impurities before it is again inhaled. The chymical solution is contained in a vessel secured on or in a core enclosed by the gasholder. When the gasholder is empty the nets or partitions are charged with solution; when gas or vapour is admitted they are in a condition to absorb and take from the gas or vapour all or some of its 20 impurities, and thus render it again fit to be used. By gas or gases I mean any kind of gas, and by vapour any kind of vapour which can be used alone or combined with other gas or vapour, or mixed with air for medicinal purposes; and by medicinal purposes I mean for the relief of disease, or for causing insensibility to pain, 25 or producing sleep. My Invention may also be employed to purify gas for various other purposes. SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by the said George Harman Barth in the Great Seal Patent Office on the 16th March 1869. 61 TO ALL TO WHOM THESE PRESENTS SHALL COME, I, George Harman Barth, Chymist, formerly residing at The Lodge, No. Ill, Westbourne Grove, Bayswater, in the County of Middlesex, but now residing at No. 8, Cambridge Villas, Hammersmith, in the County of Middlesex, send greeting. 35