US1845460A

US1845460A - Air mask

Info

Publication number: US1845460A
Application number: US270946A
Authority: US
Inventors: William E Watters
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-04-18
Filing date: 1928-04-18
Publication date: 1932-02-16
Anticipated expiration: 1949-02-16

Description

Feb. 16, 1932. w, E, wATTERg 1,845,460.

AIR MASK Filed April 1s, 1928 tically keeping its reiterati ret. ia ieee 'WILLIAM E. WATTERGS, QF MAYWOOD, llLl-HQXS ME. E

appiication nea apra is, ieee. serial no. ridare.

The invention relates to improvements in air masks and more particularlyto masks or shields for use by sand blast operators.

A principal object of the invention is to provide amask having, means Jior automa@ windows clean while in use, to maintain a clear vision for the operator.

j An object of the invention is tov provide a mask with means for washing and ltering Y the inlet resh'air.,

An object of the invention is to provide a mask with means :tor accelerating the eX- haiisting of the foul haust port tree from obstruction, to maintain its full area edective.

' An object of the invention is to provide a mask adapted for use under a hood having a window, with ing said-window clean.

An object ofthe invention is to Aprovide a maskv with yielding means for engaging the face of the sand blaster, painter or other artisan.

An object of the invention is to provide a mask with an air supply line that will not hamper the free movement of the operator.

The objects of the invention are in general, to arrange the parts in such combination, as to form an eiiicient air mask adapted to be worn by a sand blast operator, under the usual hood. To provide means associated with the mask for maintaining the windows or veyepieces'of both shield and hood tree from dirt and moisture, so that the vision of the wearer is not obstructed, and toprovidemeans for washing the incoming air and accelerating .the exhausting of the foul air and also to provide means for a snug comfortable engagement of the mask with the face, so arranged that free unhampered. 4

With the foregoing and such other objects in view` as will appear as the-description proceeds, the invention resides tion land arrangement of `details of construction hereinafter described arts and the and claimed, it being understood that lchanges in the precisel embodiment herein described may be madewithin the scope of air and keeping the Aer.-y

means on the mask tor keep.

thus formed, is

movement of the'wearer is' in the combinaf what is claimed without departing romthe spirit of the invention.

ln the drawings:

Fig. 1 is a side elevational view of the ima proved mask shown attached to the :tace oi a 'aa sand blast operator, the hood being indicated in broken lines.,

Fig. 2 showsa 'iront elevational the mask with the hood removed.

Fig. 3 is a view similar to from the opposite or inside ot the mask.

. Fig. a is an enlarged tragmental vertical central sectional viewof the mask and hood. taken along line fir-i of Fig. 2. 'f

Fig. 5 is asectional view throughthe eye e5 pieces or lens of the mask., taken on line 5-5 of Fig. 2. j i

As illustrated in the various iigures oto the drawings, the improved mask comprises a piece of Hexible ymaterial 11., shaped to cona@ form to the general contour of a human tace9 having openings adapted to receive transparent members to form windows 12 and an enlarged nose and mouth pecel arranged to carry an air 19. Secured to the periphery ot the mask.,` a cushion 16 which serves as an air seal in addition to a protector for the aceiof the wearer.

view of Fresh air is supplied to the insideot the eo v against the window 32 ofthe hood 31, vusually 90 worn over the mask as further protection.

rlhe inlet conduit 18 is provided with a bypass extending through the mask and downwardly between the windows,v which is provided with openings adjacent to the center of $5 .I

the windows to permit a small stream of air to be ejected upon the inner side of each of the windows to prevent moisture deposits.

Referring now to the drawings, apiece of flexible material 11, strong. light leather b e- 10 Fig. 27 viewed e@ liltering or washing element 3a yer, and is adapted to ing preferable, is formed to conform to the general contour of a face and is provided with a pair of windows 12 mounted, in any suitable or approved manner near the upper end thereof. Located on a vertical line running between vthe windows 12, and suciently distanced below the same, is an opening having secured to its edge a forwardly andv downwardly extending tubular nose and mouth piece 13 made of the same material as the face covering 11. rllhis tubular eX- tension or nose piece 13 has its forward end open and a cover plate or cap 14 securely closes the open end, and a series of annular accordion pleats are provided to permit a limited amount of flexing.

Secured around the edge of the face covering 11 is a sealing ring or cushion 16 which furnishes additional comfort and protection to the forehead, cheeks and chin of the wearbe indated through a valve 17, provided on its lower side.

The mask is held in place over the operators face by adjustable straps 33 secured to the mask and arranged to eXte over the head, as shown in Fig. 1. V

To admit a plentiful supply of fresh air to the inside -of the mask a rigid conduit 18 is secured toits outside, and extendsl downwardly between the window members l2. The lower end of this conduit 18 is bent outwardly at a point just above the mouth piece 12, and has its open end secured to and communicating with said mouth piece at its extreme forward end. To afford protection to the wearer from the full force of the incoming air, throughthe conduit 18, which has normally a pressure of about'20 pounds, a berous-porous substance 19, preferably a sponge is inserted in the forward end of the mounth piece 13. This material 19 is pref lerably saturated with water to wash and insure a proper distribution of the airjpassing therethrough. K

To prevent moisture from accumulatin on the windows 12, an air conduit is provlded in the form of a by-pass 21, which extends from the upper' end of the rigid conduit 18 through the mask downwardly between the windows 12. The by-pass 21 is provided with v a pair of small ports 22 adjacent the central horizontal center line ofthe windows 12. These ports 22 are so positioned on the cond duit that a stream of airisdirected laterally and angularly towards each\window, thusthe constant stream of fresh air passing over the surface of the window prevents moisture or dirt deposit thereon.

The lower end of the into the mouth piece 13 directed into a relatively large outlet or exhaust openin 23 provided on the upper side of said mouth piece. A fine mesh screen 24 (preferably 100 mesh) is mounted over'the by-pas's extends outlet opening 23 to yprevent; unwarranted nd around and.

. combination,

and its,open end is iterate@ entrance of sand particles or other foreign matter from the outside. lThis outlet opening is of sucient diameter to exhaust all of thefoul air discharged by the wearer, and its passage out is accelerated bythe air from the by-pass 21.

A piece of flexible tubing 25 is connected to the upper end of the rigid conduit 18 and extends over and downwardly behind the head of the wearer to a belt 26, which is adapted to be adjusted about the waist of the operator and has a fitting 27 secured thereto, in this instance riveted, to which the tubing 25 is connected while the opposite end of the fitting 27 is adapted to be connected to an air supply tank or pump by flexible tubing 28.

By attaching the flexible tubing 25 to the waist, the wearer is allowed unhampered freedom of movement within the limits of said conduit.

lt is customary to wear a hood 31, of the general combination shown in broken lines in Fig. 1, over this type of a mask to protect the uncovered parts of the wearers head fronriyin particles of sand, etc. Said hood is provi ed with a plurality of window members 32 and is of suliicient length to extend to the shoulders of the wearer. Under ordinary working conditions, the windows 32 become covered on .their inside with sand and moisture. l'l`o prevent this foreign matter from accumulating thereon, l propose to direct a spray of fresh air upon said window while the hood is in use in conjunction with the improved mask.

To attain this result a forwardly directed opening 34 is provided on the rigid conduit 18, adjacent the lens 12 of the mask. This Opening is preferably in the form of a horizontally disposed slot to continuously direct a horizontal fan shaped spray of fresh air upon the inside surfaces of the windows 32, thus keepingthem clear. v

From the foregoing description it can readily be appreciated that a mask constructed in the above manner will afford ample protectain the vision of the wearer clear at all times,

and finally the iniated cushion provided around the edge of the mask insures a, tight fit and allows the oprator to .wear the mask over a considerable period of time without iscomfort.

I claim:

1. A mask of the class described having,` in a face covering provided with an extending mouth piece havingan exhaust opening, and being flexibly connected to said covering and-arranged to carry a'n absorbent element, means for conducting fresh air vthrough said absorbent element to the inside of the mask, window in said covering, and

a by-.pass associated with said means having openings for discharging an air current against the innerside. of .the window to dry neeaeeo any moisture deposit thereomsaid by-pass exhausting in the exhaust opening and being arran ed to aid in exhausting the air from the mas and in maintaining the e'ective area of the exhaust opening.

2. The combination of a mask comprising, a face covering, a window therein, means for conducting air to the inside of the mask and directing a current of said air` outwardly away from said window and a by-pass on said means for directing a stream of air-against the inside of the window, with a hood havin a window',VV said hood enveloping the mas and arranged with its window in the path of said air current whereby said window is kept free from vision obstructing substances.

3. A maskof the class described, adapted to be inserted in a hood having a window, in combination, a ace'covering provided with an extending mouth piece, having an exhaust opening, flexibly connected to vsaid covering and arranged to carry an absorbent element, a window in said covering, means for conducting fresh air through said absorbent element to the inside of the mask, auxiliary 6. A mask of the class described having,

in combination, a face covering provided with Y a substantially tubular extending mouth piece having an exhaust opening and an accordion connection joiningsaid mouth piece to said covering and an absorbent element in its end, a pair of windows in said mask above the mouth piece, a substantially rigid fresh air conduit extendin downwardly on the outside of said covering between said windows having communication with the interior through said absorbent element, and a bypass extending into said mask and downwardly between said windows having openings to permit a fresh air current to be directed against the windows to maintain clear vision, said by-pass terminating in said exhaust vopening to aid the exhaust of foul air.

ln testimony whereof l ax my signature at 10 South LaSalle Street, Chicago, illinois.

i LIAM E. iA'lTERS.

means associated with said means for discurrent of air outwardly onto the window in the hood to provide clear vision therethrough.

4. The combination with a mask comprising, a face covering having windows, a sub.

stantially rigid conduit on said covering arranged for conducting fresh air to the inside of the mask having an outwardly directed opening for directing a fan-shaped spray of fresh air away from said windows, a by-pass extending into said mask for directing a fresh air current against the inside of said windows to insure clear vision; with a hood having a window, said hood being arranged over the mask with its window in the path of the outwardly directed fresh air current whereby said window is maintained free from vision obstructing substances.

5. The combination of a mask comprising, a face covering having means for securing it 1 to'thehead of a wearer, a window in said E covering, means mounted on said covering for conducting fresh air to the inside of the mask and directing an auxiliaryair current outwardly away from said window, and a bypass in said means for directing a stream of air against the inside of said window, with a hood, said hood having a window and being arranged over said mask with said window 1n the path of said auxiliaryair current whereby said window iskept free from vision obstructing substances.

Eli@

rae