US990578A

US990578A - Screen.

Info

Publication number: US990578A
Application number: US58315210A
Authority: US
Inventors: John R Mcdonald
Original assignee: MAXIMILIAN A MOSLE
Current assignee: MAXIMILIAN A MOSLE
Priority date: 1910-09-22
Filing date: 1910-09-22
Publication date: 1911-04-25
Anticipated expiration: 1928-04-25

Description

MTNE'SSE-,l I fluff/fronl MM@ JULHNWCDOMLD f v A, moli, YS

J. R.y MUDONALD.

SCREEN.

APPLIOATIOH FILED SEPT. zz. 191D.

990,578.A Patented Apr. 25,1911.

UNITED sTArEs-PrgrENT OFFICE Jo'HN .In mcnoNALD, .or CIRCLE, wYoMINAssIGNoR Inmo MAXIMILIAN A. 1f1vIosLE,

or NEW YORK, N. In.. .wf

SCREEN.

Specieation of Letters Patent.l

Patented Apr. `25, 1911.

Application filed September 1910. Serial No. 583,152.

To all whom 'it 'may concern.'

Be it known that I, JOHN R. MCDONALD, a citizen of the United States, and a resident of Circle, in the county of Fremont and State of Vyoming, have invented certain new and useful Improvements in Screens, of which the following is a clear, full, and exact disclosure.

My invention relates to screensused for protecting rooms, refrigerators, or other inclosed or partly inclosed spaces from flies or other insects. I have observed that when insects light on screens they are usually trying to either escape' or enter the screened compartment and will readily be guided by a slight inclinatiolrof the screen.

One object of my invention is to take4 advantage of this observation and to provide a screen Which can be cheaplyv made and which willrfacilitate all insects lighting on its inner surface to escape and at the same time will revent insects from entering. A further object of my invention is to so construct the screen that it will not obstruct the View of persons looking through it at an angle tothe screened opening as is the case with screens of ordinary construction. l

Referring to the drawing accompanying and forming a. part of this specification, Figure l is a front elevation of a screen embed ing my improvements. Fig. 2 is a side e evation of the same. Fig. 3 is an elevation of a door in which is fixed a modified form of screen embodying my invention. Fig. 4 is a side elevation of the same. Referring in detail to the structure shown in Figs. l an'd 2, numeral 1 designates a frame of any approved construction suitable in size to fit the opening to be screened and inwhich is secured the screen 2. The latter is made preferably of Wire gauze and is .concave or bulged outwardly from the chamber to-be rotected and has a hole 3 at the apex. or common house flies vthis hole should be about three-eighths of an inch in size, while for other insects its size may be varied with` the size of the insect. The inclination Qf the surface of the screen on its inner side, due' to its conical or concave fornibn that side, guides the flies or insects "toward thehole in the center through Which theycan readily pass, While theV inclination of the screen on the out '.de guides them away from' the opening. I have found an inclination of about thirty degrees for the screen surface to be satisfactory, though larger or smaller' angles may be employed. It will be seen that With this construction, the insects Wherever they light on the inner surface of the screen, are induced by the inclining surface to pass along the screen in the direction of and through the opening Without being made to change their course or encountering projections, obstructions or angles of any kind which would divert them from their course. It will also be observed that a person on the inside'of the screen, owing to its bulged construction, can see through it in all directions and it is not necessary to raise the screen in order to observe objects at one side of the screen. The screen 2 in the door shown in Figs. 3 and 4 is the same as that above described, except that the exit opening 3 is located near the upper side of the screen, Which arrangement is an advantage in some cases due to the tendency of insects to travel toward the upper side'of the screen after lighting. This form is also desirable in some cases because the bulged or projecting part of the screen is raised so high that it will not inconvenience users of the door. In Some cases where long horizontal openings such as transoins are to be screened, a plurality of screens such asthat shown in Fig. 1 may be placed side by side or a single screen may be formed with a plurality of bulges and corresponding openings.

IVhile I have illustrated andfdescribed a screen made of wire gauze, it is obvious that it may be Inade of other material such as sheet metal or evenfof glass and may be perforated or solid.

It Will be observed that my screen can be formed by stamping or otherwise out of a single sheet of gauze and may be secured in a frame 'ot' ordinary construction and is free of complicated parts and unsightly attachments.

Other modications may be made in my improved screen without departing from the spirit of my invention or the scope of my claims.

That I claim is:

1. A device of the kind described, comprising :t frame, a screen secured therein bulged outwardly, with an opening at the apex ofthe bulge, the inner surface ofthe screen bei'pg unobstructed and inclined outwerdIy-from the sides of the frame to the sides of the frame to the opening, substanopenng, substantially as described. tally as described.

2. A device of the kind described com- T prsu1g-eframe,a Cone-ShapedV screen Secured JUHB R' MCDONALD j) 'therein' with an opening at the apex, the Vitnesses:

inner surface of the screen being unob- ,BENI BLAGG,

strueted and inclined outwardly from the Ross HODPINQAMER.