US 1944399 A
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Description (OCR text may contain errors)
F. M. BOWERS Jan. 23, 1934.
WELDERS MASK Filed D60. 4, 1931 INV ENTOR ImiamkMEmwers H25 ATTORNEY Patented Jan. 23, 1934 UNITED STATES PATENT OFFICE Claims.
This invention relates .to welders masks, and has for an object to provide a welders mask having a sight opening therethrough, with means for supporting the transparent sheet forming such sight opening, and presenting upon the anterior of said mask no metallic parts.
In the use of a welders mask, it is well known that metallic elements at the anterior of said mask subject to the influences of the welding operation are objectionable, and especially if such metallic elements pass entirely through the welders mask as they are conductive of heat and under some conditions, as well, conductive of electric current.
The present invention, therefore, is directed to the formation of a welders mask of sheet material of a non-conductive nature, upon the anterior of which is positioned a frame of nonconductive material secured to the sheetmaterial from the interior of the mask, and with improved means for maintaining a transparent sheet in the frame.
The invention is directed to other objects and possesses other features of novelty and advantage, some of which, together with the foregoing,
will be hereinafter more fully set forth.
In the drawing:
Figure 1 is a view of a fragment of the anterior part of a welders mask seen in side elevation, with the frame member seen in end elevation,
Figure 2 is a view of a fragment of a mask in front elevation, as indicated by arrow 2 at Figure 1,
Figure 3 is a longitudinal sectional view "through the frameand adjacent structure, as
taken on line 3-3 of Figure 2,
Figure 4 is a transverse sectional view through the frame and adjacent structure as on line 44 of Figure 2, V
401 Figure 5 is a detail view partly in end elevation and partly in section of the follower for the interior of the mask, and
Figure 6 is a perspective View of the angle emnon-conductive material, as for instance, bakelite, although the invention is in no way limited to the particular material.
the transparent sheet13 which may and in most caseswillbe of glass. The opening in theframe member in which the glass is inserted corresponds to and registers sheet 10.
A follower 14 is properly proportioned to be inserted through the opening of the mask and within the frame 11. The glass 13 is of such proportion as to lie within this follower when in position, as indicated at Figures 3 and 1.v The ends of the follower are formed bevelled as shown at 15 in Figure 3 to correspond to the curvature of the sheet 10 and an angle 16 is inserted within this follower, and the entire organization formed into a unitary structure as by the screws 17 passing through the openings .18 in the angle and through the bevelled end 15 of the follower 14 and into the frame 11.
The follower is provided with an opening 19 at each end, and the angle is provided with a slot 20 registering with the opening 19 of the follower. V
A spring 21 has ears 22 at the ends extending through the slot 20 of the angle and into the opening 19 of the follower. This, spring is substantially the type shown in applicants prior patents and applications and is not specific to the present invention, except to-the formation of the ears 22 at the ends, It occupies a bowed position as shown at Figures 3 and 4, the central part of which is provided with a slit forming a tongue 23 which bears upon the transparent sheet 13. When moved to dotted line position as shown at Figure 3, the transparent sheet may be removed from the frame without the necessity of removing the spring bodily from the supporting structure.
It will be noted that the only metallic parts of the structure are within the curvature of thesheet 10, and are, therefore, wholly insulated from the welding operation which is performed, of course, upon the exterior of said mask.
Of course, the welders mask, herein illustrated may be modified in various ways without departing from the invention herein set forth and hereinafter claimed.
The invention is hereby claimed as follows:-
1. A welders mask comprising an arcuate body part having an opening, a frame member of insulating material having an arcuate part fitting upon the anterior of the arc and having an open- The frame member has an-inturned flange 12, upon which is seated,
with the opening in the ing registering with the opening of the body, means having also a registering opening within the are for securing the frame rigidly to the body part, and means including said last mentioned means to maintain a transparent sheet yieldingly within the securing means.
2. A welders mask comprising an arcuate body having an opening in the anterior part, a frame of insulating material upon the anterior surface of the arc and having an opening registering with the opening of the body, a follower within the are inserted through the opening of the arcuate body and into the frame, and penetrating means inserted through said follower, through the arcuate body and into the posterior side of the frame.
3. A welders mask comprising an arcuate. body having an opening in the anterior part, a frame of molded insulating material having, a; part curved to fit the arcuate body and with a relatively plane anterior side; said frame presenting an opening registering with the opening of the bodyand having an inturned flange, a follower within the body, penetrating means inserted through the follower and the arcuate body into the frame, and means within the frame for maintaining a transparent sheet within the fol lower upon the inturned flange.
4. A welders mask comprising an arcuate body of sheet material having an opening through the anterior part thereof, a frame of molded insulating material upon and corresponding with the arcuate exterior and presenting a relatively plain anterior part, said plain part being provided with an opening having an inturned flange, a follower within the arcuate body having a part inserted through said body and into said frame and with parts extending outwardly over the margins of said arcuate body, penetrating means extending through the outwardly extending parts through the arcuate body and into. the frame from the interior, and means fitted within the follower to maintain a transparent sheet upon the inturned flanges of the frame.
5. A welders mask comprising an arcuate sheet. of material having an opening therein, a molded frame of insulating material upon the exterior of said arcuate body, said frame com prising an opening having an inturned flange, a follower Within the arcuate body inserted through said opening: and into: the frame. and clamping the. margins. of the material therebetween. an angle secured upon said follower and having one flange extended downwardly within said follower and provided with an opening, and: a spring retainer having ears: inserted in; said. opening and its intermediate. part bowed", into position for clamping a sheet of transparent ma.- terial upon the flange of the frame.
FREDERICK M. BOWERSJ' iOO