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.

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    Specification. HaseUines Improved Inhaling Apparatus. surface of tlie stopper B, whereby it is protected from injury. When the parts are in the position seen in Figure 3, a hand i of india-rubber or other suitable material (one end of which is permanently attached to one side of the stopper B) is stretched over the stopper e of the acid 5 vessel and the inlet tube, and secured to the opposite side of the stopper B by a hook or catch k, as seen in Figure 4. This band serves to hold the stopper of the acid vessel in place, and protect it and the inlet tube when packed for travelling. The long tube C, Figure 1, may be replaced by the nasal tube D, Figure 6, when it is desired to inhale the 10 vapor through the nose. In Figure 7 the inlet tube h is represented as provided at its lower end with a valve m opening downward, so that any upward pressure on its under concave surface will instantly close it and thus prevent the entrance of any liquid. I am thus enabled by the use of this valve 15 to effectually prevent the rising of the liquid in the inlet tube and its entering the acid vessel, which might occur when the stopper B was inserted into the mouth of the main receptacle, owing to the com¬ pression of the air within the latter. It is evident that the valve m may be used instead of the valve d as it will also prevent the rising of 20 the liquid in the inlet tube should any person inadvertently breathe or blow into the exhaust tube. It is preferable however to retain the valve d as it prevents the evaporation of the volatile portion of the liquid in the main receptacle which would occur if the valve m only were employed. I do not confine myself to the use of a valve m of the 25 particular construction shewn, as any other suitable valve may be used instead, and although I prefer to use both of the valves d and m yet either one can be used without the other if desired. Figure 8 represents a modification of this Invention, in which neither of the valves d or m is employed. In this case the exhaust tube is of 30 somewhat different construction from that above described; its vertical portion 11 above the stopper is provided at its top with a horizontal branch 12, at one end of which is a valve P opening outward, while to its opposite end is secured the mouth-piece 13 through which the vapor is inhaled, and during this operation the valve P is tightly closed by the 35 pressure of the external air as a vacuum is created within the branch 12. Should however any person breathe or blow into the tube 13 the valve P