US 1050718 A
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Description (OCR text may contain errors)
W. P BREWSTER.
Patented Jan. 14, 1913.
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W. P. BREWSTER.
APPLICATION FILED rmme, 1912.
1,050,? 18. Patented Jan. 14, 1913.
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v mj?fiwewaz em tion, especially UNITED STATES PATENT oFFIo-E.
WILLIA'M P. nnnws'rnn, or s'r. Louis, mssounnnssmnon or ONE-HALF TO HARRY A. ursnaw, or say Loursnrssoulu.
Specification of Letters Patent.
Application filed February 26, 1912. .Serial No. 679,846.
To all whom. it may concern:
Be it known that I-, W1LI.iAM- P. BREW- s'rnn, a citizen of the United States, and resident of St. Louis, Missouri, haveinvented certain new and useful Improvements in Respirators, of which the following is a The object of my inventionis to provide.
an improved respirator which is adapted to be temporarily attached to the'head of the user over the mouth and nos e, with the parts arranged in such a manner that the absorbent or medicated filtering material will only be exposed to air drawn from the exterior of the respirator and cannot be contaminated by the exhaled air.
A fu-rther object of my invention 'is to provide such a respirator with an improved construction of fresh air tube, where by fresh air from the exterior of the house may be drawn into the respirator through the said tube and through the medicated absorbent material within the respirator and thence pass into the lungs of the user, and.
then exhaled through a special exhaling valve, without contaminating the medicated absorbent material.
A further object of myinvention is to provide a respirator of improved construcdiseases of the lungs.
In the drawings Figure 1 is a perspective view of my improved respirator in practical use upon a patient lying in bed adjacent a window; Fig. 2 is a front elevation of my respirator with the absorbent-material chamber detached in order to show the in-- haling passages and inhaling valve; Fig; 3 is a sectional side elevation of the respirator; Fig. 4 is a front elevation of a fresh air strainer. applied to the outer end of the fresh air tube; Fig. 5 is a sectional side elevationl of the fresh air strainer; Fig. 6-is a detail perspective view of a valve seat made use of in carrying out my invention; and
Fig. 7 is a sectional side elevation of a detachable absorbent-material chamber, which may beinterchangeably applied to the resadapted for use in treating Patented Jan. 14, 1913.
pirator' in lieu of the absorbent-1material chamber to which the inner end of the fresh air tube is connected.-
The numeral l-indicates the body of the respirator, which is substantially coneshaped, but the base margin 2 of which is shaped in the arc of a circle as shown at the right hand side of F ig; 3; At the opposite side of the body 1 is an integral hollow nosebridge 3, which together with the marginal edge 2 of the body is shaped to anatomically fit the use-rs nose and face at points adjacent his mouth.
At the outer end of the conical body 1 is the inhaling valve chamber 4 the outer end of which is screw threaded'to fit corresponding screw threads 5 formed upon the absorbent-material chamber 6 which is detachably connected to said inhaling valve chamber 4.- Mounted within said valve chamber 4 is the inhaling valve seat 7 having a series of perforations 8 and detachably clamped in position within said valve chamber by the absorbent-material chamber 6 when the latter is screwed into position. Fixed upon the inner face of said valve seat 7 and adapted to normally closethe perforations 8 of said valve seat, is a flexible inhaling valve 9, preferably made of mica or other flexible material. Said inhaling valve 9 is supported upon its seat by means of a screw or rivet 10, so that when inhalations take place the valve will open inwardly as indicated by dotted lines in Fig. 3.
In the treatment of diseases of the airpassages of the head,-thr0at and lungs, I locate within the absorbent-material chamber 6 a sponge or other body of absorbent or filtermg material as indicated by the numeral ll.
12 indicates a flexible fresh air tube which has its inner end secured to one of the absorbent-material chambers, as shown in Fig.
3, while the other, end, is, during use to be passed out through an opening 13 i'nthe window sash 14,35 shown in Fig. 1, to per mit fresh air to be drawn into the respirator, in treating lung diseases. Located upon the outer end of the said fresh air tube 12 is a. strainer 15, which may be of any preferred construction.
In using the fresh air tube 12 the absorbv cut-material chamber to which the inner end of said tube is' attached, is screwed into position upon the respirator; but when the inhaled air is taken from the room in which the valve-seat 7 is removably clamped.
the user is located, the said fresh air tube and its absorbent-material chamber, are replaced by an interchangeable absorbent-material chamber which is shown in Fig. 7, the same having a series of inlet perforations 16 in its outer end.
17 indicates an exhaling valve chamber, the interior of which is in communication wit-h the interior of the body 1 by means of an opening 18. The outer end of said exhaling valve chamber is screw threaded to receive the screw threads 19 of the screw cap 20. The inhaling-valve chamber a and the absorbent-material chamber 6, are (as will be seen) constructed with annular enlargements at the meeting ends of each; thereby forming opposite annular shoulders, or seats, separated by a space within which It will thus be seen that said valve-seat is clamped between said opposite annularshoulders within the said annular enlargements. The said screw cap 20 clamps in position the exhaling valve seat 21 provided with a series of perforations 22 normally closed by an eXhaling valve 23. The construction of the said exhaling' valve is preferably identicalwith said inhaling valve 10 previously described, except that the exhaling valve opens outwardly while the inhaling valve opens inwardly.
The numeral 24 indicates strap loops to which the straps 25 are attached, in temporarily securing the respirator in position upon the user, as shown in Fig. 1.
In use the sponge llis properly saturated with a medicated liquid, and placed within the absorbent-material chamber, so that all air entering the interior of the respirator must necessarily pass through the said sponge. When the user inhales the air will vented from, coming in contact with the medicated sponge or other material located in the absorbent-material chamber, by the automatic closing of the inhaling valve 9, so that said exhalations must pass outwardly through the openings 22 of the exhaling valve seat 21. Likewise, when inhalations are made by the user the said exhaling valve 23 will automatically close and prevent the entrance of air otherwise than through the said absorbent-material chamber.
The valves 9 and 23 are preferably made of mica, because I have discovered that this material has certain advantages not possessed by any other material known to me, as it is flexible, moisture-proof and transparent, besides possessing other advantages which need not be recited.
hold during the operation of uniting and.
separating said parts, while they are being prepared for use.
The improved respirator, comprising a hollow body shaped to fit the users face, :1
valve-chamber and an absorbent-material chamber having mating telescopic annular enlargements screw-threaded together at the front end of said body and forming a handhold on the exterior of said parts, and having internal opposite annular shoulders and a corresponding annular space within said chambers, a perforated valve-seat carryin an inhaling-valve and removably clampe in said annular space of said enlargements between said opposite shoulders, and a suitable exhaling-valve also connected to said body. y
In testimony whereof, I have signed my name to this specification, in presence of two subscribing witnesses. I
WILLIAM P. BREWSTER.
JOHN C. HIcDoN, E. L. WALLACE.