US 812706 A
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Description (OCR text may contain errors)
PATENTED FEB. 13, 1906.
APPLIGATION FILED we. a, 1904.
H8. X J a w M N W W m W m J ATTORNEYS To all whom itfmqly concern rs wa n hills. as
witness-en, or n nwros, NEW ERSEY.
noleiaioej Y a full, clear, and exact description.
. tion, in which similar characters and conforming substantially thereto.
This invention relates to Improvements in respirators, an object being to vice of this character, that will provide a dee very light, and therefore adapted to be conveniently worn over a person's nose to supply out-oi door air to iuvalids'orother persons requiring pure air duriu waking or sleeping hours, the device being I will describe a respirator embodying my ions fumes, ti
invention and then point out the novel features in the a pended claim.
Reference is to be had to the accompanying drawings, forming a part of this specificaof reference indicate corresponding parts in all the figures.
Figure 1 is a front view of arespirator em bodying my invention showin the same in position. Fig. 2 is a-sectioml elevation of the device, and Fig. 3 is a section on the line '3 3 of Fig. 2.
The respirator comprises a shield or mask 5 designed to be placed over a persons nose The inner edge of the bottom wall is curved and provided with a downwardly-- extended flange, as indicated. at 6. This curved portion is designed to engage over the lip just be low the nose, leaving the mouth free. 'lhe rear edge of the respirator is provided with a suitable packing 7 "which will bear suiii-- ciently close against a persons face to prevent the inlet or outlet of air or the like.
an elastic cordor tape 8, secured at one The device is held in position by means of;
to one side of the respirator and adapted to engage at the other end with a hook 9; but
other means for securing the device in posi- 'tion may be employed without departing iroin the spirit of my invention. When the elastic is used, however, the same will be passed over peciiication of Letters Patent;
lilso adapted for use in laboratories, shops, and other places where nox- Patented Feb. 13, 1906.
and under-the,ears,.as plainly indicated in the form of a flap-valve, preferably consist ing of thin rubber, so that it will readily open and close. v 7
In the upper wall of the respirator is an inlet opening 13, controlled by an inwardly-opening flap-valve 1.4 of similar construction to the outwardly-opening valve 12. Connected to the upper wall of the respirator and communicating with the inlet 13 is a short tube 15, which may consist of any suitable light material-such, for instance, as thin aluminium and it is to be understood that the body of the res irator and the hood l .11 may also be made 0 the same material. Connected to the tube 15 is a flexible tube 16,
designed to be passed to the open air-such,
for instance, as through an opening 1n a w1ndow-sash, as indicated in the drawings or through an opening in a,window-casing or the like or to a'connection with a large air-conduit when used in common in the same room by many personsars, for instance, in factories, &c. v
. To prevent lateral motion of the flexible tube, which might disarrange the respirator, i may employ a head band or cap 17, designed to be placed on a persons head and having metal clips 18 for engaging with the flexible tube.
"When the device is in use, as a person in halos the valve 12 will close and. prevent the drawing into the lungs of any air except through the "external supply-tube 16, and t e inlet-controlling valve prevents the sup lytube from being filled with expired air an rebreathed. The valves being very light will operate noiselessly, which. is a very essential feature, especially when the'device is worn by a sleeping person.
Having thus described my invention, I claim as new and desire to secure by Letters Patent A respirator comprising a nose-mask, the inner edge of the lower wall being curved and provided with a downwardly-extended flange, the said mask. having inlet and outlet openings, valves for said openings, a hood ever the outlet-opening and open at the botname to this specification in the presence of tom the said hood belng inclined downward two subscribing witnesses.
and outward and fully inclosing the valve :1 I e short tube communicating with the inlet, aiid JObEPH WARBAbbE' it flexible tube extending from said short Witnesses:
tube. I ISRAEL L. HALLOCK,
In testimony whereof I have signed my HARVEY L. HALLOOK.