US 1615718 A
Description (OCR text may contain errors)
Jan. 25,1927. ,7 8
H. S. OLGARD RESPIRATOR Filed Aug. 4, 1925 V INVENTOR. flaw/y '6. Olgan Patented Jan. 25, 1927.
UNITED STATES HARRY S. OLGARD, 0F KOI-ILER, WISCONSIN.
Application filed August 4, 1925.
This invention relates to a respirator for protecting operatives employed where the atmosphere is liable to be charged with deleterious particles of matter or injurlous gases, and has for its object to provide, in a manner as hereinafterset forth, a respirator which may be readily attached against the face of the wearer to enclose the mouth and nostrils and further including means for supplying fresh pure air for inhalation and from which the exhaled air can be separately discharged.
A further object of the invention is to provide, in a manner as hereinafter set forth, an air container and new and novel means for connecting the same in position with respect to the other elements of the respirator, and further with new and novel means for c011- necting the container to the body of the wearer.
Further objects of the invention are to provide, in a manner as hereinafter set forth, a respirator which is comparatively simple in its construction and arrangement, strong, durable, compact, thoroughly efficient in its use, conveniently positioned, and comparatively inexpensive to manufacture. I
With the foregoing and other objects in view, the invention consists of the novel construction, combination and arrangement of parts, as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.
1n the drawings wherein like reference characters denote corresponding parts throughout the several views:
Figure 1 is a side elevation of a respirator in accordance with this invention, showing the adaptation thereof with respect to a person wearing the same.
Figure 2 is a rear elevation thereof, in section.
Figure 3 is a section on line 3-3, ure 2.
Figure 4 is a section on line 4-4., ure 2.
Figure 5 is a section on line 5--5, ure 4.
Figure 6 is a section on line 6-6, ure 2.
Serial No. 48,123.
Figure 7 the 6- it sat Referring to the drawings in detail, the respirator includes a body portion formed of a rear part generally referred to by the reference character 1 and a forward part generally referred to by the reference character The rear part providesa shield and is adapted to enclose the nose and mouth of the wearer, and the forward part provides a combined valved inlet and valved outlet mechanism for controlling the inhaling and exhaling of air and to which leads a pure air supply. 'fhe rear part 1, at its forward end, is formed integral with the back of the forward part 2.
The rear part 1 comprises a hollow conoidal-shaped member 3 formed of light metallie material having secured to its rear or larger end a pneumatic cushioning element 4 providing a seal, or rather a snug fit throughout when the body portion is secured against the face of the wearer. The element a is in the form of a tube and is positioned against the inner face of the member 3 and projects rearwardly therefrom. The element 4 is secured in position by a flexible retaining member 5, which is positioned against the inner and outer faces of the member 3 and encloses the element 4. Positioned against that part of the member 5 which is arranged against the inner face of the mem ber 3, is a binding strip 6, which is secured in position by hold-fast devices 7, not only extending through the strip 6, but also through that portion of the member 5 arranged against the inner face of the member 3, through the member 3, that portion of the member 5 arranged against the outer face of the member 3, and a binder strip 8 positioned against that portion of the member 5, which is arranged against the outer face of the member 3. The inner face at the is a section on line 7-7, Figrear end of the member 3 is bevelled, as at 9,
and against which is positioned the element 4. When the rear part 1 of the body portion is positioned against the face of the wearer, the element 1 in connection with the member 5 acts as a seal to prevent the passage of injurious gases or other matter to within the member 3.
Secured-to the outer face of the member 3, at diametrically opposite points, that is at the sides of said member 3, as indicated at 10, 11, are rearwardly extending securing straps 12, 13, respectfully, adapted to be adjustably connected together, as at 14, for the purpose of securing the member 3 in position against the face 15 of the wearer. The straps 12 and 13 extend around the back of the head 16 of the wearer when the body portion is in operative position. "See Figure 1.
The forward part 20f the body-portionincludes a casing referred to generally by thereference character '17 and which comprises a rear wall 18, a front wall 19, abott'0111-20,-&11Cl' a pair of end walls, 21, 22. The upper corners of the 'casing 17 are rounded, as at 23. The rear wall 18 is formed centrally with a combined inlet and outlet"opening 24, which establishes communication betweenwthe chamber 25 formed by the casing 17' and the chamber 26 provided with the member 3. The forward end ofthe member-3 *is integral with the wall 18 and registers with the wall of the opening-"'24. Connected 'to or formed integral withthe'innerface-ofthe end wall 21, at a point between its transverse center and lower end, is a longitudinally extending partition 27* which terminates adj acent'the open- 'ing 24--and merges intoa vertically disposed partition 28' connectedwith or integral with the bottom 20. The partitions 27 and 28, in connection with the end 'wa.ll-2l--and bottom 20, provide a-pure air inlet chamber '29. The partition 27 is TOlillGfl with an outlet 30 for the chamber and which is employed for establishing communication between said chamber 29 and chamber 25. The outlet 30 isnormally closedthrough the medium of a-spring controlled-inletvalve 31 for the' chamher 25. The valve 31 is pivoted, as at 32,to the wall 2l -andseats onthe top of-the-partition 27 to close the "opening 30. An expansion "spring is interposed between the top'wall 34 0f the casing 17 andthe valve 81. Sockets' 35 are provided forthe ends of the spring- 33. The endwall 21, below-the par- -tition 27, is provided with an-opening 36 and with an inwardly extending hollow coneshaped holder 87, which registers-with and forms a continuationof the wallof the opening 36. The holder 37 extends into the chamber 29 but is of less length than the length of said chamber.
Arranged within the chamber 25is a verrtically disposed partition 38 positioned in proximity toi'the opening 24 on that side opposite the side to which the partition 27 extends towards. The partition 38 is con nectedjto or is integral with the top Wall '34 and isof a height less than the. height of the chamber 25. The-lower end of the *partition 38 terminates i111 an inclined par- .itition 39, which extends towards the of joinder of the end wall 22 with the botportion' of: lthe. respirator.
point tom 20 and is connected with said walls, as at 40. The partition 39 is provided with an opening 41 constituting an outlet for the chamber 25, and said outlet is normally closed by a spring controlled valve 42, which is pivoted, ascat 43, to the partition 38,
The valve 42 seats on the upper face of the partition 39 to close the opening 41 and is normally maintained in open position by a pulling spring-44, \which is interposed between the top wall 84 of the casing 17 and the upper face of-thewalve 42. The ends of the spring 44 are connected, as at 45. The partitions 38 and 39, in connection-with the end wall 22,top wall 84, front and rearwalls 18, '19, pr0vide an outlet chamber 46, and the opening" 41 establishes communication betweenthe chambers '25 and 46.
The rearwall 18 of the casing 17, between itsverticalmedian and the end wall 22, is formedwith an opening 47, and em tending: across the latter a foraminous element 48, secured to the rear face of the wall '18 and arranged-within arearwardly extending-collar'l-tl, which is integral with the wall 18. -The lower portionof the collar 49 is cut. away, as at 50, to provide an outlet. A combined protectingand deflecting member is positioned rearwardly with respect to the foraminous element 48 and'which comprises a circular upper portion 51 terminatingin a rectangular depending extension 52. The portion 51, for: a part of its length, is provided with a forwardly extending annular flange 53, Wl1iCl1 S6'2ltSO1'1-tl18 collar 49. A
brace piece 54isint-eg'ral with and extends diametrically of-the'forward face of the portion 51 and bears againstthe foraminous element 48. The extension 52 cepends to a pointnear the bottom 20 of the casing 17.
The space betweenthe ends of the flange 53 forms a. continuation of the outlet 50.
i The front wall 1 9V is. provided centrally :withan opening-5.5, :closed by a removable plug '56 andwhich provides means whereby :access can be had to the chamber. 25.
A pure air container is :in'dicatedat 57 2lI1Cl-Wl11l1 conslsts ofafle-Xible bag provided with a valved inlettuhe-58 forthe'purpose ofzisupplying air to the-container 57. -The 'with an elbow-shaped. nozzle 60, formedwith a conoidal-shaped discharge end 61, which snu rl rliits the holder 37 when thenozzle is secured to the forward part 2 of the body See nignre 5. The container 57, when worn, is positioned at theback of the wearer, see-Figure 1, and is retained in such position by a V-shaped --s upport-ing-strap 62,:having each of itswlegs fixedly secured to the side of the container 57,: as et -63. The forward end of thestrap 62 is connected to a depending strap 64,190-
sitioned at the front of the wearer and adjustably connected, as at 65, to a vertically extending strap 66, carried by a waist band 67. The element a is provided with a valved inlet tube 68.
When the respirator is mounted in position, the wearer, during the act of inhaling, will open the valve 31, thereby permitting of the supply of pure air from the container 57 into the chamber 25, and which passes through the opening 24: to the wearer. During the act of inhaling, the valve 42 will be moved to close the opening 41. On exhaling, the valve 31 will be moved to its seat, closing opening 24, and the valve 42 moved from its seat, thereby establishing communication between the chambers and 46 for discharge.
It is thought that the many advantages of a respirator in accordance with this invention, can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood that changes in the details of construction can be had which will fall within the scope of the invention as claimed.
hat I claim is 1. A respirator comprising a combined nose and mouth protecting element, a casing connected to the forward end thereof and communicating therewith and provided with a valve controlled air inlet means and a valve controlled air discharge means, said casing having a discharge opening at the rear thereof adjacent the forward end of said element, a screen extending across said opening, and a combined protecting and deflecting element connected to the rear of said casing and opposing said screen and providing means for deflecting the discharge of air downwardly into the atmosphere, said protecting and deflecting element further including means for bracing the screen.
2. A respirator comprising an air container having connected therewith an elbowshaped discharge nozzle, a valve controlled air supply and discharging means adapted to be secured against the face of the wearer and enclose the mouth and nose of the wearer, said means provided with an air inlet chamber, an air receiving chamber and an air outlet chamber, said air inlet chamber having supported therein lengthwise thereof a conical shaped tubular member extending from the outer end wall and terminating at a point removed from the inner end wall of said chamber, said member spaced from the top, bottom and side walls of said inlet chamber and providing means for frictionally securing and supporting the discharge nozzle within said chamber.
In testimony whereof, I alfix my signature hereto.
HARRY S. OLGARD.