US 1917961 A
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Description (OCR text may contain errors)
H. A. FEE
PROTECTIVE MASK July 11, 1933.
Filed Jan. 1931 Patented July 11, 1933 nanny a. ran. or ADRIAN, mcmean' raotrnc'rrvn MASK Application filed January This invention relates to protective masks.
This invention has-utility when incorpo;
rated in a mask to be worn while in run healthful atmospheres. Referring to the drawing:
Fig. 1 is a side elevation, parts being.
broken away, of a mask embodying the in vention herein;
Fig. 2 is a view looking into the mask from the face receiving side thereof;
Fig. Fig. and
Fig. 6 is a view on the line VT-VL Fig. 41.
The mask of the invention herein is designed to be worn by persons working'in atmospheres surcharged with foreign or obnoxious matter, such as regions in the vi cinity of spray painting'and the like. The mask is designed to not only protect the eyes and up] er face portions, but also to in.-.v sure to the wearer an ample supply of un contaminated air while preventing the breathing of unhealthful air, alsoproviding a maximum freedom and comfort to the wearer. i I
The mask comprises an annular frame 1 a is a view on the line IVIV, Fig. 2; 5 1s a view on the line V;V, Fig. 1;
designed to encircle a face and is provided with lining 2 of a cushioning means which may be a pneumatic tube, or the like. This construction permits the frame'to be comfortably and easily fitted to a wide range of shapes and types of faces. with buckle 1 serves as adjustable means for fitting and maintaining the frame onhead 5 of a wearer. Attached to the frame 1 is a member 6 forming a visor extending to form a protective shield for the foreheadand upper portions of the face. This visoro terminates in edge 7 between drop sides 8 which form blinders or side protective shields in the vicinity of the eyes.
The visor 6 is provided with fan-shaped duct 9 therethrough to havedischarge opening 10 along the edge 7 of this visor, the duct extendin to airsupply line 11.
The visor is attached tothc frame 1, and the duct 9 has needle valve12 therein for" control of the air supply from the line 11V to determine the discharge from the opening 10. The discharge forms a film of air jetted downwardly as a curtain in front of the eyes of the wearer of the mask, tending to a is a View on the line 111411, ri
trap 3 provided 1921. Serial No. 506,159.
prevent particles of foreign matter passing through the opening. provided for vision be.
low the visor. This film orcurtain ofzair is sufficient for normal usages to ,affordample protection against particles of materialgetting into the eyes. I
. The visor 6 has additional duct 13 there through from the line 11 and has needle valve 1 1 therein for controlling air flow to branch line 15 extendin downwardly about the frame and through the frame at its lower portion or at a region below'the chin receiving portion. This duct 15 is provided with slot 16 having baffle 17 thereaboveso that air discharged into the lower portion of the mask from this line 15 is directed outwardly from the wearer.
Hinged to the lower portion of theframe 1 1s mouth and nose cover 18 contoured to form a shield for the lower TEZLCG'POIUOHS while not coming in contact with any part thereof. Spring finger 19 'coacts with the line 15 as a. snap connect on to hold the sh eldin upward or sh1eld1ngpos1t1on. Button 2O facilitates the opening of the shield to allow the wearer to expectorate or attend the nose without removing the mask. I The air discharge in the lower portion of the mask from the slot 16 discharges as a film against thisshield 18 and is thereby directed upwardly to be breathed by thewearer, the excess'and exhaled air being discharged over the upper edge 21 thereof. .The edge QL-does not reach the edge 7 of the visor, and there is thus provided clearspace 22 therebetween affording an opening for vision as well as an outlet for excess and exhaled air.
The air discharging through the opening between the visor and cover will under some conditions be sufficient alone toprotect the wearer from undesirable substances with a resulting economy in the use of air.
In. some instances it may be desirable to 7 add a further protection for the eyes and mask. The transparency may be used in lieu of an air film from the visor or in some instances f air. may be delivered from the visor when the transparency is attached thereto, the latter-especially when unusually fine particles of foreign matter tend to quickly cloud the vision therethrough.
to provide an expansion chamber 25 in the line 11.: This may be of a relatively small volume and be attached to belt 26 of the wearer and the flow thereto controlled by valve 27 in line 28 extending from a suitable source of air supply under pressure. The
'valve 27 may be adjusted to prevent too great a pressure reaching the line 11. The expansion chamber 25 allows the air to be prewarm'ed so that when discharged intothe mask it will not have, a chilling effect on the wearer. The line 11 extending to the belt 26 also prevents direct pulling of the air supply line on the upper portion of the mask, and also retains the air line 11 out of the way from interference therefrom while working. 3
There is thus provided a protective mask designed to give-maximum comfort to the wearer, to supply a volume of clean air in excess of the breathing capacity of the wearer so that no air will be drawn intothe mask from the surrounding atmosphere. There is also provided a means fol-creating an air film or curtain acrossthe eyes of the wearer preventing particles of foreign matter getting thereinto, and the hinged nose and mouth shield further add conveniences for the wearer. The removable t-ransparency protects the clear space 22 without obstructing discharge of exhaled air. The air regulators in the branch lines permit a nicety of adjustment to care for a wide range of conditions, while the diffusion of the air in the mask prevents a direct jetting against the face. When used in connection with spray painting, the line 28 may receiv'eits supply from the same source of pressure used by the spraying devices.
The mask may have straps 3 attached invarious manners affording comfort to" the wearer under different conditions. Also, the mask may be used with one of many of the well-known types of spray paintinghoods covering all or any desired portion of the head. 7 What is claimed and it isdesired tosecure by United States Letters Patent is:
l. A mask-comprising a face encircling band forming a framehaving a visor, a lower'face portion shield hinged to said frame extending upward to leave a clear space betweensaid shield and visor, and
an air supply to said mask having a discharge within the shield. V I
2. A mask comprising a face encircling band forming a frame having a visor, a
lower face portion shield hinged to said frame, an air supply to said frame having a'branch extending to discharge at the visor 1,917,9ei I edge and havinga branch to discharge with- "lower face portion shield hingedto said frame, an ail-supply to said frame having a branch extending to discharge at the visor edge and having a branch to discharge with.- in the shield outwardly from the wearer against the lower portion of the mouth shield. V I 4. A mask comprising an annular frame to fit around the face, a visor extending therefrom, a relatively shiftable lower face portion shield hinged to said frame, an air supply extending to the frame having a branch through the visor to be discharged as a film of air from theedge thereof.
5. A mask comprisingan annular frame to surround the face, avisor extending therefrom, a relatively shiftable lower face portion shield hinged to said frame, an air supply extending to the frame having a branch through the visor to be discharged as a film of air from the edge thereof, and a branch extending along the frame to discharge into the lower portion of the shield outwardly from the wearer.
6. A mask comprising an annular frame of sheet metal having cushioning means thereabout to surround a face, a visor ex tending from said frame, a relatively shiftable lower face portion shield hinged to said frame, and a clip carried by said shield coacting with said frame to hold the shield against the frame in face protecting position.
7. A mask comprising a frame, a visor extending therefrom, a lower face portion shield carried by the frame extending toward the visor and leaving a clear space therebetween, and a transparency having clipfit connection with the free edge ofthe visor to extendtherefrom over said clear space.
5 8. A mask having a frame, a relatively shiftablelower face portion shield and an air supply to the shield interior comprising a film of air directed away from the wearer onto the lower shield region and upwardly along the shield to be discharged over the top :edge thereof.
9. A mask comprising a face encircling band forming a frame having a visor, a lower face portion shield hinged to said frame, an air supply to said frame having a branch extending to discharge at the visor edge and having a branch to discharge within the shield away fromthe wearer, and an independently controlledair supply for each branch In witness whereof'I aflix my signature.
7 f HARRY A. FEE.