US 2391565 A
Description (OCR text may contain errors)
Dec- 25, 1945- T. H. GRINDROD ET AL 2,391,565
VNELDFR'S MASK Filed March 14, 1944 25 26- FIG. 4 z8 Patented Dec. 25, 1945 WELDERS MASK Thomas H. Grindrod and Arthur E. Church, Portland, Oreg.
Application March 14, 1944, Serial No. 526,371
This invention relates generally to the Welders art and particularly to a welders mask.
The main object of this invention isto provide an improved form of Welders mask whereby the wearer will be protected from the fumes arising from the welding or cutting operation, at the same time afford a means of cooling the face of the wearer, aswell as affording freshy cool air for breathing purposes.
These and other objects will become more apparent from the specifications following as illustrated in the accompanying drawing, in which:
Fig. 1 is a side elevation of the device, with a portion of the fastening strap broken away.
Fig. 2 is a front elevation of Fig. l.
Fig. 3 is a fragmentary section taken along the line 3 3 in Fig. 1.
Fig. 4 is a fragmentary elevation taken along the line 4 4 in Fig. l.
Similar numbers of reference refer to similar parts throughout the several views.
Referring in detail to the drawing, there is shown a nose piece Iii which is fairly rigid and which has an inturned edge II which is somewhat exible and adapted to provide a cushion between the nose piece i3 and the face I2 of the wearer. The lower end I3 converges toward an outlet opening which is connected to a iiexible tube I 4, whose tip I5 is provided with a slit I5 which permits the device to function as a Iiap valve through which air may be exhaled, but which will close in the opposite direction. Devices of this character are in common use and over which the device which we are about to describe is an improvement.
Extending thro-ugh the side Il of the tube I is a flexible hose I8 which extends upwardly along the interior of the nose piece lil to the closed end I9. The portion of the hose I8 near the nose 20 of the wearer is provided with lateral perforations 2 I.
It is desirable to piece lll to receive a erably elastic.
provide loops 22 on the nose head strap 23 which is prei- The hose I8 is provided with a valve 24 of any type suitable for regulating the oW of air through the hose lI8 from a source of supply (not shown). The operation of the device is as follows:
When in use with or without a welders mask, the nose piece I Il is merely put into place in a manner to completely cover the nose and mouth of the wearer. The valve 24 is then adjusted to provide the desired amount of air, it being only necessary to provide an ample quantity as an excess will merely carry the exhaled air out through the tube I4 and between the edge II and the face thereby serving to cool the face of the wearer and avoid the overheating of the face, which is a common objection to al1 forms oi" masks.
In other words, there is at all times a pressure slightly above that of the surrounding atmospheric pressure, thereby insuring an outward new of air at al1 times and making it impossible for any gas to enter the nose piece.
It will be understood that the cushion Il may be smooth or uted to encourage the flow of air along the face of the wearer withoutv departure from our invention.
In Fig. 4 the. flutes 25 are produced by forming notches 26 in the edge 2l. The surface 23 is in direct Contact with the skin of the wearers iace.
While we have thus illustrated and described our invention it is not our intention to be limited to this precise form, but it is our intention to cover all such forms and modifications of the device as fall fairly within the appended claim.
A device of the class described consisting of a nose piece adapted to cover the nose and mouth of the wearer, the edges thereof contacting the cheeks of the wearer, said edges being iiuted to permit the outward ow of air therethrough, and means for injecting fresh air along the front of the nose piece and discharging it outwardly in both directions toward the cheek engaging edges.
THOMAS H. GRINDROD. ARTHUR E. CHURCH.