US1747764A - Eye ring for gas masks - Google Patents

Description

Fb. 18, 1930. H. ENGELHARD 1,747,764

EYERING FOR GAS MASKS Filed Aug. 13, 1926 EZf/I7I7III7IIIii' c" 5 al li n nlor a v ifi m y Patented Feb. 18, 1930 UNITED STATES'IPATVENT orrice HEEMANN ENGELHARD, OF BERLIN, GERMANY, ASSIGNOR TO DEUTSCHE GASGLIIH- LIGHT-AUER-GESELLSCHAFT MIT BESCHRANKTER i-IAFTUNG, OF BERLIN, GER- MANY, A CORPORATION OF GERMANY EYE FOR GAS MASKS Application filed August 13, 1926, Serial No. 129,071, and in Germany September 4, 1925.

With masks of all kinds serving for the protection against suffocation by gases, it is of utmost importance that the range of vision is obstructed as little as possible. This fact is not properly taken into account with the known eye-glasses, since the mountings of the eye-glasses are of too large dimensions, so that they cannot be approached to the eyes sufiiciently enough without injurious annoyance to the wearer by pressure. With the known mountings for eye-glasses for the purpose mentioned, which are attached to the mask by rolling them into the latter, there is the drawback, that the bent portion for the fabric of the mask is arranged behind the bent portion for the glass window.

The present invention obviates this drawback in such a manner that the bent portion for the eye-windows is situate-d adjacent the bent portion for the fabric of the mask. In this way it is possible to reduce the height of the mountings for the eye-glasses approximately by one half, that is to say almost to the height of the fabric of the mask or the thickness of the eye-window, thus the wearers eyes or the portions of his face close by will suffer no discomfort by pressure.

In the accompanying drawing one mode of execution of the invention is illustrated in a sectional view.

As shown in the illustrated example, the material a which comprises the body of the mask is provided with an opening through which the annular flange b of a major ring 6 is inserted so that the material a at the periphery of said opening is folded into surface engagement with, said flange b. The flange b is bent to form an annular subflange b whereby the folded portion a ofthe mask material a is clamped against the inwardly extending flange 0 of an auxiliary ring 0, the flange c and the opposed surface of the ring 6 providing a relatively wide flat bearing for the material a, which at these points is folded upon itself, whereby said .material and rings are securely connected to fix the mounting in place, the clamping surfaces of said flange 0 and ring 7) lying approximately in the plane of the material a. The main ring I) is doubled upon itself as shown in the drawing and at its inner periphery is provided with a bead (Z against which lies a sealing ring e of rubber or other suitable material. The lens or eye glass f is arranged in contact with the sealing ring e as shown and is clamped in place by means of a clamping ring 9 which possesses an inherent relatively strong resiliency whereby said ring 9 is caused to bear against the eye glass f with sufficient pressure to maintain it in position in the mounting. The clamping ring 9 itself is clamped between the flange b of the main ring 5 and an annular flange 0 formed by bending the auxiliary ring 0 inwardly as shown in the drawing.

WVith the arrangement illustrated and described the mounting for the eyeglass and material, as well as the material and the eyeglass all lie in approximately the same plane, and the transverse height of the mounting is reduced to a minimum. The eyeglasses may thus be brought into close proximity to the eyes of the wearer without developing any annoying pressures or other uncomfortable conditions to the wearer of the mask.

I claim:

In a gas mask, the combination of a body of flexible material provided with eye-openings,

a metallic mounting in each of said openings comprising a ma or ring consisting of an annular flange defining the periphery of an eye-opening, and sub-flanges projecting outwardly from said annular flange in spaced, substantially parallel relation, an auxiliary ring consisting of a peripheral flange and an inwardly extending flange projecting from said peripheral flange between said subfianges in spaced parallel relation thereto,

said sub-flanges and inwardly extending flanges providing relatively wide, flat bearingvsurfaces, said body material at the eyeopenings extending between said sub-flanges and inwardly extending flange and being folded about the peripheral edge of the latter so as to be clamped by said flanges against said bearing surfaces, a bead forming part of said maj or ring within the eye-opening thereof, a packing ring lying against said head, an eyeglass in said eye-opening in engagement with said packing ring and lying in substantially the same plane as said body material, and a clamping ring lying in surface engagement with the one sub-flange of said major ring and projecting inwardly beyond a the same into engagement-With said eye-glass for clamping the latter against said packing ring, said auxiliary ring extending inward- 1y over said clamping ring and clamping it against said one sub-flange.

m In testimony whereof I affix my signature.

HERMANN. ENGELHARD.

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