US766867A - Inhaler for anesthetics. - Google Patents

Description

PATENTED AUG. 9, 1904.

G. L. BENNETT. INHALBR FOR ANE'STHETIGS.

Irma/fiar m5/M w l APPLICATION FILED DEO. 7, 1903.

l.. wwm/ai! N0 MODEL.

iwf/M5565 Patented August 9, 1904.

NITED :STATES PATENT @einen GEORGE L. BENNETT, OF CHICAGG, lLLINOlS.

INHALER FOR AN ESTH ETICS.

SPECIFICATION forming part of Letters Patent No. 766,86*?, dated August 9, 1904.

Application filed December '7, 1903. Serial No. 184,245. (No model.)

.To a/ZZ whom it may concern:

Beit known that I, Geenen L. BENNETT, a citizen of the United States, residing at Chicago, in the county of Cook and State of llli nois, have invented a new and useful Improve ment in Inhalers for Anesthctics, of which the following' is a specification.

My invention is related to mechanical devices used in the practice of surgery; and the objects in my improvement are, first, to provide a more convenient and compact evaporator that can be carried in the surgeons pocket; second, to provide an evaporator that can be held in the hand, the heat of the hand causing the iiuids in use to evaporate more rapidly; third, to provide an evaporator that will enable the operator to see at all times just what quantity of iiuid he has in it. l. attain these objects by a mechanism illustrated in the accompanying' drawings, in whichi Figure l is a longitudinal sectional view of the entire device. Fig. 2 is a sectional view cut on line 3 3. Fig. 3 is a sectional View taken on line 2 2.

Similar letters refer to similar' parts throughout the several views.

My invention consists in a cylindrical tube A, of glass or other suitable material, havingI rims f g cemented externally to each end, the rims being provided with screw-threads internally. Caps or plugs F G are inserted .in the ends by means of the screw. The small tube c is bent in the shape of an elongated hook and fixed centrally in the plug Gr, extending into the cylinder half its length. The small cock e is then V[ixed to the outer end of the tube, the cock having means for connecting a hose 1, leading' to an air-compressor.

object of this arrangement is to enable the operator to change the nasal fork l) from the TheV vertical tube 71 to the horizontal tube o', re placing it with the cap l. This change is required when the patient takes the anesthetic in a recumbent position. WV hen the patient sits in a chair, the device is used in the position shown in drawings.

The transverse tube o has another function. The device being cylindrical, it would roll from the position where it was laid; but the tube being lixed at one side of the cylinder the tube forms a base for it to rest on.

rEhe cylinder A is provided with an opening J in one side, fitted with a suitable stopper, to enable the operator to spill in the anesthetic fiuid.

The object of the hook-shaped tubes is to preclude the possibility of spilling the iiuid out by accident or otherwise, as there will never be more than one-half ounce of liuid in it at a time. They are `fixed longitudinally in the same plane with the cylinder with both open ends on the same side. However, they may be set at a right angle with the transverse tube, so that when the evaporator is resting on the tube and nasal fork they will stand in a vertical position, open ends uppermost.

In operation connect a hose leading from an air-rcscrvoir with the cock on lower end of evaporator, spill into the chamber the quantity of fluid anesthetic required, the patient having been arranged in a reclining or Vertical position, and the nasal fork adapted to the position ofthe patient by changing it from vertical to the horizontal tube, or the reverse, as the case may be. Turn on the air, and it will pass through the lirst hooked tube and be blown down on or into the liuid, causing it to evaporate and be taken up by the air and forced out through second hooked tube to the nasal fork in the direction shown by arrows, the fork having been adjusted in nostrils of the patient. The flow of air may be regulated by the cock, it being an ordinary three-way cook having three sizes of discharge-ports. (Shown at E, Fig. l.)

As the operator knows exactly the quantity of anesthetic lluid he has in the evaporator and the relative percentage of fresh air he can control, the danger of a collapse of patient is IOO one fixed centrally in the lower plug and one fixed eccentrically in the top plug,- said tubes extending into the said cylindrical reservoir, the transverse tube having a longitudinal, eX- tension, the movable nasal fork, the cock connected with the projecting end of the tube C and means for connecting a hose substantially as described.

GEORGE L. BENNETT.

Vitnesses:

CHARLES C. BISHOP, M. E. GREGG.

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