US2049102A - Ophthalmic mounting - Google Patents

Description

July 28, 1936. BAKER 2,049,102

OPHTHALMI C MOUNT ING Filed May 15, 1935 INVENTOR N8)60i'l M. B aKer ATTO EY Patented July 28, 1936 PATENT oi-rice 2,049,102 OPHTHALMIC MOUNTING Nelson M. Baker,.Southbridge, Mass, assignor to American Optical Company, Southbridge, Mass, a voluntary association of Massachusetts Application May 15, 1935, Serial No. 21,501

2 Claims.

This invention relates to ophthalmic mountings and particularly to goggles or eye protectors and has particular reference to improved means for ventilating the same.

One of the principal objects of the invention is to provide improved means for providing additional ventilation for usual types.

Another object of the invention is to provide means whereby the ventilation may be increased or decreased quickly and easily.

Other objects and advantages of the invention will become apparent from the following description taken in connection with the accompanying drawing and it will be apparent that many changes may be made in the details of construction and arrangement of parts without departing from the spirit of the invention as expressed in the accompanying claims. I, therefore, do not wish to be limited to the exact details of construction and arrangements shown and described as the preferred forms only have been shown by way of illustration.

Referring to the drawing:

Fig. I is a front view of a pair of goggles embodying the invention;

Fig. II is a cross section on line II-II of Fig. I;

Fig. III is a perspective view of one of the eyecups of the goggle showing the parts unassembled; and

Fig. IV is a cross section similar to Fig. II but showing the goggle adapted for ordinary purposes.

In the prior art Where devices of this kind were worn by those working in confined areas it Was found that the usual types would not provide suflicient ventilation in the interior of the eyecups and the lenses would become steamed or fogged which was dangerous as well as annoying to the user. One of the principal objects of the invention is to overcome these difliculties.

Referring more particularly to the drawing wherein like reference characters designate like parts throughout, the goggles shown embodying the invention comprises a pair of eyecups I each having an edge portion 2 adapted to fit against the face of the wearer and be held thereagainst by the headband 3 which is connected to the eyecups l by means of the clip members 4. Adjacent their outer ends I, the eyecups are provided with the threaded portions 5.

When the goggles are to be used for ordinary purposes, as shown in Fig. IV, a lens such as B is placed on the ends I of the eyecups and held thereon by cap members H which have threaded portions to engage the threaded portions 5 and flanges l2 to retain the lens 6 on the seat I when the threaded members are engaged.

When the goggles are to be worn in confined areas, a split perforated annular member 8 with the flanges 9 and I is positioned so that one of its flanges 9 rests on the seat 1. On the other flange I0 is positioned the lens 6. An annular cap member I I having the ventilation openings I1 is then placed over the lens 6 and perforated member 8. This cap member II has a flange 10 [2 adjacent its forward end I3 and a threaded portion I4 adjacent its opposite end l5 when the threaded portion M of the cap II is threaded onto the threaded portion 5 on the eyecup l, the flange l2 engages the lens 6 and retains the parts in assembled position.

It will be noted that additional ventilation is provided through perforations 16 in the perforated member 8 and through the openings I! in the cap member I I. The goggles may be worn 20 by workers in confined areas without the danger and annoyance of the lenses becoming steamed or fogged and also that as the goggles may be quickly and easily adapted for either purpose it is not necessary to keep a double stock as the same goggle may be quickly and easily adapted for either purpose.

From the above it will be seen that I have provided means whereby goggles of the usual type may be easily, efilciently and economically adapted for use in confined areas.

Having described myinvention, I claim:

1. In a device of the character described, an eyecup having a seat adapted to be engaged by a transparent screen, screw threaded means adjacent said seat, a perforated cylindrical spacer member having inwardly extending flanges, one of said flanges adapted to form a seat to engage the seat on said eyecup, the other of said flanges adapted to form a seat to be engaged by-said transparent screen, a perforated cap member having an inwardly extending flange adjacent one end and screw threaded means adjacent the other end thereof adapted to engage the screw threaded means on said eyecup, said cap member adapted to fit over said spacer member and adapted to engage said transparent screen with said flange engaging said transparent screen when said screw threaded means on said cap member engages the screw threaded means on said eyecup, the perforations in said cap member being large in the direction of the periphery thereof and the perforations in said spaced being very small as compared to the perforations in said cap member to prevent the entrance of foreign particles while permitting substantially free and even cross ventilation throughout the periphery of said eyecup.

2. In a device of the character described for use with an eyecup having a seat adjacent one end thereof normally adapted to support a lens and connecting means adjacent said seat, a cylindrical spacer member having a plurality of relatively small adjacent openings throughout its side Walls and having an end adapted to engage the seat on the eyecup and an end adapted to form a seat to be engaged by the lens, a perforated cap like member having an inwardly exto permit free ventilation and yet aid in preventtending flange adjacent one end andconnecting means adjacent its oppositeend adapted to en on the eyecup, said cap like memberbeing adap'ted to fit over the spacer member when in position on the eyecup and adapted to engage the lens with its flanged portion engaging said lens when the connecting means are in cooperative relation with each other, the perforations in said cap like member being relatively large as compared to the openings in the spacer member and being adapted to embrace a plurality of said openings in said spacer member to permit" substantially free and even cross ventilation beneath the lens throughout the periphery of the eyecup, the openings in the spacer member being so formed, as

ing' the entrance of foreign particles into said eyecup during use.

" NELSON M. BAKER.

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