US699737A - Fly-exit for screens. - Google Patents

Description

No.'699,737. Patented May I3, 1902., G. F.'WOBK|NG. FLY EXIT FOR SCREENS. (Application filed Apr. 26', 1901.)

(I0 Model) lTE STATES PATENT OFFICE.

CHARLES F. l/VORKING, OF OTTUMWA, IOWA.

FLY-EXIT FOR SCREENS.

SPECIFICATION forming part of Letters Patent No. 699,7 37, dated May 13, 1902.

Application filed April 26, 1901. Serial No. 57,557. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES F. WORKING, a citizen of the United States of America, and aresident of Ottumwa,Wapello county, Iowa, have invented a new and useful Door and Window Screen Fly-Exit, of which the following is a specification.

The object of this invention is to provide means for the exit or escape of house-flies or other insects from the inner surface of awindow-screen or door-screen without necessitating the removal of said screen.

My invention is based on an observation of the habits of house-flies in their attraction to the light and their tendency to crawl or walk upwardly along the inner surface of a window or screen, evidently seeking an opportnnity to escape into the sun lighted and warm atmosphere exterior of a room or inclosure.

My invention consists in the construction, arrangement, and combination of elements hereinafter set forth-,pointed out in my claims, and illustrated by the accompanying drawings, in which- Figure 1 is a face View of my improved attachment unattached to a screen. Fig. 2 is a face view showing my improved attachment mounted on a screen-door as required for practical use. Fig. 3 isa cross-section of my improved attachment and the upper bar of the screen-door, showing in further detail and enlarged View the construction of device and means for attaching the same to the door.

In the construction of the device as shown the numeral 10 designates a bar, preferably made of wood and formed with a beveled edge 11, a portion of which edge is beveled on an angle of about forty-five degrees to the plane of the face of the bar, and the remaining portion is beveled on an angle of about thirty degrees to said face.

The numeral 12 designates a bar, preferably made of woodand formed with a beveled edge 13 at an angle of about forty-five degrees to theface of said bar. 7

The bars '10 12 are of approximately the same thickness and are arranged with their beveled faces in proximity to each other and spaced apart by wedges or strips 14, 15, and 16, which strips are of such thickness as to produce a slot of desired width between the bars and are so shaped as to hold the faces of the bars in alinement whensaid bars are connected by nails driven through their edges and through the strips, as illustrated in Fig. 3. A concave 17 is formed in the edge 13 of the bar 12 and opens broadly to the slot between the bars, one wall of the concave taporing out gradually to the outer extremity of said slot. A concave 18 is formed in the edge 11 of the bar 10 and opens to the slot between said bars opposite to the concave 17, and one wall of said concave tapers out gradually to the outer edge of the slot. The concaves 17 18 extend to material depth in the bars 1210, and the strips 14, 15, and 16 are shaped to fill and fit transversely of said concaves, thus forming partitions in the con-- caves and plugs for the ends thereof.

The device, composed of the bars 10 12 and the strips 14, 15, and 16, should be of a length corresponding closely to the width of a door or window opening and may be employed by mounting said device between the upper edge of an upper window-sash and the lower faces of the header of the window-frame, with the slot of the device inclined outwardly and upwardly from the inside to the outside of the window. In such position the device serves as means of permitting the escape of housefiies and other insects from the inner faces of the window to the sun warmed and lighted exterior of the inclosu're, inasmuch as said house-flies will crawl upward on the windowglassand seek escape through the slot.

It sometimes occurs that house-flies will attempt to enter through the slot of the device, and it is to avoid suchentering that I have provided the concaves 17 18 opening to the slot in order that the fly, following the surface of the slot, will enter one or the, other of the at its lower and side edges to the door in an ordinary manner; but its upper edge is bent into the wider inner edge of the slot and fixed to the beveled face of the door 10, as illustrated in Fig. 3. The bar 10 may be screwed to the side rails 21 22 and the middle rail 23 of the door. When employed in conjunction with a door, as illustrated in Figs. 2 and 3, my improved device presents a slot opening upward and outward from a point immediately below the head-bar 19 of the door and enables the house-fly to crawl upward along the inner face of the screen 20 and out through said slot. My improved device may be similarly mounted on a screen-frame employed to close a window or other opening, the slot being arranged immediately below the headbar of said frame.

I claim as my invention- 1. In a fiy-exit for screens, the combination of two bars rigidly connected together and spaced apart, a slot formed between said bars narrowing toward the exterior of the door, and a concaved recess in each edge of said slot so shaped that both edges thereof slant toward the exterioropening of the slot.

2. The combination of a screen frame formed withahead-bar, two bars fixed to said screen-frame and spaced apart, the edges of the bars being beveled to form a slot, the slot and the lower bar overlapping the lower edge of said head-bar and a screen on said frame, the upper edge of said screen being bent within the slot and fixed to the lower bar, the

beveled edges of the bars being formed with 35 concaves opening to said slot.

Signed by me at Ottumwa, day of April, 1901.

CHARLES F. WORKING. Witnesses:

GEo. F. HEINDEL, WM. S. PARKER.

Iowa, this 20th

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