US1120695A - Metal fly-screen. - Google Patents

Description

G. H. DAVIS.

METAL FLY SCREEN.

APPLIGiTION FILED SEPT. 2 1913.

1,120,695. Patented Dec. 15,1914.

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UNITED sTArrEs PA 1ENT OFFICE.

GEORGE E. DAVIS, OF PORTLAND, MAINE, ASSIGNOR TO EDWARD T. BURROWES, OF

' PORTLAND, MAINE.

METAL FLY-SCREEN.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed September 2, 1913. Serial N 0. 787,694.

To all whom it may concern Be it known that I, GEORGE H. .DAvIs, Cltlzen of the United States, residing at Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Metal Fly-Screens, of which the following is a specification.

This invention relates to fly screens and the like, and more particularly to such screens the frames of which are constructed wholly of metal.

One of the objects of the invention is to provide a screen frame of this character which shall be stronger and more rigid than those heretofore proposed and which, at the same time, can be more cheaply manufactured.

A further object is to provide a screen of extremely thin, compact structure, the corners of which are no thicker than the side members and in which all parts of the frames are absolutely smooth and flush with each other, thereby presenting an exception ally neat and finished appearance.

\Vith the above objects in View the invention consists in the construction and combination of parts hereafter described and illustrated in the accompanying drawing, in which,

Figure 1 is a fragmentary view of one side of my improved screen frame;-Fig. 2 is a similar view of the other side thereof; Fig. 8 is an edge view of Fig. 1; Fig. 4 is a section on the line 44 of Fig. 1, looking in the direction of the arrow; Fig. 5 is a View showing the method of assembling the parts; Fig. 6 is a perspective view, showing one side of one of my improved corner pieces; Fig. 7 is a similar view, showing the other side of such a corner piece; Fig. 8 is a fragmentary perspective View of the wire holding molding which may be employed: and, Fig. 9 is a view similar to Fig. 4, but showing a modified construction.

Referring to the drawings in detail, the most striking feature of my new design consists in the specially constructed corner pieces A. These corner pieces are preferably of solid forged metal, such as iron or soft steel, and each comprises a corner block 1 and a pair of extending arms 2. One face of the corner block is substantially square in shape, and of dimensions greater than the width of the arms 2, (see Fig. 7). The other side of the block 1 is also substantially square in shape, as indicated at 6, but does not extend entirely to the inside of the corner piece. The block 1 is thicker than the arms 2, the surface 3 being separated fromthe arms 2 by shoulders 4 and the edges of the block 1 projecting beyond the edges of the arms 2, as indicated at 5. One sideof the arms 2, as indicated in Fig. 6, is rahbeted, as indicated at 8, and such rabbeted portion is separated from the surface 6 of the block 1 by means of shoulders 7. It will thus be seen that each arm of each'corn'erpiece is provided with a relatively thick inner edge 12, and a relatively thin rabbeted outer edge 11. The side bars forming the frame are designated by the characters B and C, and as clearly shown in Figs. 4 and 5, each of such members comprises a thin, rabbeted portion 11 and a thick portion 12', separated by a shoulder 8, suclr parts cor responding exactly with the parts of the corner pieces designated by the same reference numerals. In other words, the cross section of each of the arms 2 is identical with the cross section of the side bars B and C.

In assembling a frame in accordance with my invention, four corner pieces such as A are selected from stock. Four side pieces such as B and C, which may readil'v be formed in stock lengths by rolling, a.re cut to the proper length. Each side member such as B is then united at each end with the end' of an arm 2 of one of the corner pieces, the preferable method of uniting being by means of electric welding. After the four side members and the four corner pieces have been thus welded together, a very rigid and practically solid frame results.

In the drawings the welded joints are indicated by the reference character :11. While I have referred to electric welding, and while this is the best method at present known to me, it is to be understood that the members may be joined by other means, as, for example, by brazing, if desired.

After the frame has been assembled in the manner described, the wire fabric is stretched over the same, the edge of such fabric being bent around the thin rabbeted outer edge of the frame, as clearly indicated in Fig. A. The wire is securely held in place by means of molding D, (see Fig. 8) which is provided with a flange 10 of substantially the width of the frame, and with a flange 9 of less width, the edge of which abuts against the shoulders 8 and 8. This molding may be secured in position at intervals by screws, rivets or other suitable fastening devices, as desired.

The particular form of side members and molding which I have shown is the same as that illustrated in the patent to Cole, No. 1,017,958, dated Feb. 20, 1912, but the general construction of frame is wholly different. It will be observed that in the Cole patent, the side members are united by means of a miter joint at the corners and that owing to this construction a corner plate D is necessary. This produces an increased thickness at the corners of the screens, as shown in Fig. 3 of the Cole patent, which is objectionable. By reference to Fig. 3 of the present drawing, it will be observed that all parts of the frame, including the corner, are substantially of the same thickness, and present an absolutely smooth, flush appearance. This is due to the fact that the ends of the molding D fit snugly against the shoulders 4:, 5, and 7, the combined thickness of the molding, wire fabric'and arms or side members being equal to the thickness of the corner blocks. Moreover. these solid forged corner pieces'with the thickened corner blocks result in a much stronger structure than is possible with the prior arrange ments. It will also be obvious that a great saving of labor results from the elimination of the separate corner plates. such as are necessary in the Cole construction.

Instead of the shape of side bar above described, I may employ that shown in Fig. 9. By reference to this figure, it will be seen that the bar B is substantially rectangular in cross-section, and of uniform thickness throughout. The molding D has two flanges 9' and 10 of equal Width, and this molding entirely embraces the side bars on both faces thereof. With this construction, it will, of course, be understood that the corner pieces will be alike on both sides, each side being of the form shown in Fig. 7, and the ends of the molding will abut against the shoulders of the corner blocks in the manner above described.

It will thus be seen ,that I have provided an extremely thin, compact and rigid screen neat in appearance, and it is thought that themany advantages of the invention will be readily appreciated Withoutfurther discussion.

What I claim is:

1. In a screen, the combination with a rigid, all metal frame, of wire fabric stretched over said frame, and a molding embracing said frame to hold said fabric, the corners of said screen, when the parts are assembled, being of substantially the same thicknees as the side members thereof including the molding.

2. In a screen, an all metal frame comprising solid, forged corner pieces, each piece consisting of a corner block and a pair of arms extending therefrom, side members rigidly united with said arms, a wire" fabric stretched over said frame, and a molding cooperating with the frame to holdsaid block on one side projecting beyond the surface of said arms, side members secured to said arms to form a closed frame, wire fabric on said frame, and a wire holding molding on said frame and lying flush with the surface of said block.

4C. In a screen, rigid corner pieces each comprising a corner block and a pair of arms extending therefrom, each face of said block being of square form, the dimensions of such square face on one side being greater than the width of said arms, side members secured to said arms to form a closed frame, wire fabric on said frame, and a wire holding molding on said frame and having a Evidth equal to that of said larger square ace.

5. A screen frame comprising side mem bers, a wire holding molding fitting over said side members, and corner blocks against which the ends of such molding abut.

6. A screen frame comprising side members, a wire holding molding fitting over said side members, and corner blocks against which the ends of such molding abut, the surface of such corner blocks being flush with the outer surface of said molding.

7. A screen frame comprising side members, a wire holding molding fitting over said side members, and corner blocks against which the ends of such molding abut, the thickness of such corner blocks being substantially equal to the combined thickness of each side member and coiperating moldmg.

8. A screen frame consisting of rigid corner pieces comprising a corner block and a pair of arms extending therefrom, side members welded to said arms, said side members and arms being substantially rec- In testimony whereof I have aflixed my tangular in cross-section, and a Wire holdsignature, in presence of two witnesses. ing molding of substantially the same width GEORGE H. DAVIS. us said arms and side members entirely em- \Vitnesses:

5 bracing said parts, and having ends abut- EDWARD T. BURROWES,

ting said corner blocks. IDA F. MCNAIRN.

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