US1120684A - Metal fly-screen. - Google Patents

Description

E. T. BURROWES. METAL FLY SCREEN.

APPLICATION FILED SEPT.2,1913.

1, 1 20,684. Patented Dec. 15, 1914.

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EDWARD T. BURROWES, OF PORTLAND, MAINE.

METAL FLY-SCREEN.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed September 2, 1913. Serial No. 787,698.

To all whom it may concern:

Be it known that I, EDVARD T. BUR- nowns, citizen of the United States, residing at Portland, in the coimty of Cumberland and State of Maine, have invented certain new and useful Improvements in Metal FlyScreens, of which the following is a specification.

This invention rel-ates to metal fly screens, and more particularly to screens of this character having rigid frames constructed entirely of metal bars and corner pieces.

The objects of the invention are to provide a frame which can be assembled at a comparatively small labor cost, and which when so assembled will be exceptionally strong and rigid and, at the same time, extremely neat, ornamental and finished in appearance.

To this end the invention consists in the construction and arrangement of parts hereinafter described and claimed, and illustrated in the accompanying drawing, in which,

Figure 1 is a fragmentary view of one side of the improved screen frame with the parts assembled; Fig. 2 is a sectional view thereof, substantially on the line 22 of Fig. 1. looking in the direction of the arrow; Fig. 3 is a sectional view taken through the corner and one of the side members; Fig. is a view of a corner of the frame itself, showing the method of manufacture; Fig. 5 is a view similar to Fig. 1, showing a different form of holding strip; Fig. 6 is a section through one side of the frame shown in Fig. 5.

This invention is in the nature of an improvement over the construction shown in the co-pending application of George E. Davis, filed Sept. 2, 1913, Serial No. 787,694.

In the present invention the same method of assembling the frame is employed as disclosed in such former application, namely, the provision of rigid forged corner pieces, and the welding of the side members thereto. In the present case, however, the arms of the corner pieces and the side members are channel shaped in cross section.

In the drawings. A designates one of the improved corner pieces, while B and C indicate the side members. The arms of the corner pieces and also the side members are provided with flanges or heads 1 and 2, the inner flange 1 preferably being of less height than the outer flange, and said flanges preferably having rounded upper edges. The frame is constructed by placing the side members B and C, of suitable length, end to end with the arms of the corner pieces, and electrically welding them together, as indicated at w in Fig. 1. After the frame has been thus formed, the wire fabric E is laid 'over the frame and holding strips D are then placed in the channel of the frame and secured by suitable fastening means, such as screws or rivets 10, in such a manner that the fabric is drawn over the inner flange 1 and down into the channel under the strip, as clearly shown in Fig. 2. The raw edges of the fabric may then be cut oil flush with the strip by running a knife along the outer edge of the strip at the point marked 6 in Fig. 2.

It will be seen that the strip and fabric lie below the level of the outer flange 2 of the frame.

In order to avoid the necessity of cutting the holding strips D to exact lengths, a corner plate F is provided and formed to fit the channel in the corner piece A. This plate is arranged to overlap the ends of the holding strip D, as indicated at 7 in Fig. 1, so as to produce a finished appearance. It is obvious that the strips D may therefore be cut off approximately the proper length, and since they are hidden by the corner plate F, there is no necessity for even cutting them smooth or square. Thus it is possible to cut and assemble these strips rapidly and with unskilled labor.

In order to prevent any increased thickness at the corners on account of plates F, it is preferred to employ the construction shown in Fig. 3. By reference to this figure it will be seen that the channel in the corner pieces is deeper at the point 3, ad jacent the corner, than at the points 3, adjacent the side members, and from the bottom of the channel at its deepest point rises a boss 4 to a height somewhat greater than the thickness of the holding strip D. The corner plate F rests upon this boss 4, and is held in position by means of a screw 5. By virtue of the increased depth of the channel adjacent the boss, it is thus possible to keep the upper surface of the plate F below the level of the flange 2, thus producing a flush, smooth structure without any projecting parts. The strip D is sufficiently flexible to bend downwardly into the deepened portion of the channel and under the plate F, as clearly shown in Fig. 3, the upper surface of such plate being substantially in the same plane as the outer surface of the holding strip D where it lies in the channels of normal depth in the side members.

In Figs. 5 and 6 there is shown a different form of wire holding molding, such molding consisting of a relatively thick portion 8, (Fig. 6) provided with a relatively thin, longitudinally extending, laterally projecting lip 9, which is arranged to overlie the inner flange 1 of the frame. As shown in the drawings,this molding may conveniently be formed of a strip of sheet metal, folded over upon itself. A slightly modified form of corner plate F is employed and the ends of the molding may either abut against this plate or project under it, as desired. In this construction also, it will be observed that there are no parts which project beyond the level of the outer flange 2.

What I claim is:

1. In a screen, a rigid metal frame, channel-shaped in cross section, a wire holding strip lying in the channel, and a corner plate overlying the ends of such strip, the outer surfaces of such strip and corner plate being below the level of the outer flange of said channel-shaped frame.

2. A screen frame, channel-shaped in cross section, an integral boss rising from the bottom of the channel at each corner of the frame, wire holding strips lying in the channel and having their ends terminating adjacent such boss, and a'cover plate secured to said boss and overlying the said ends of the strips.

3. A screen frame, channel-shaped in cross section, an integral boss rising from the bottom of the channel at each corner of the frame, wire holding strips lying in the channel and having their ends terminating adjacentsuch boss, and a corner plate secured to said boss.

4. A screen frame, channel-shaped in cross section, such channel being deeper at the corners than at the middle of the sides of said frame, and a wire holding strip in the channel.

. 5. A screen frame, channel-shaped in cross section, such channel being deeper at the corners than at the middle of the sides of said frame, a wire holding strip in said channel, a boss rising from the bottom of said channel to a height slightly greater than the thickness of said strip, and a cover plate secured to said boss.

6. A screen frame of channel shape in cross section, a wire holding strip lying in said channel below the level of the outer flange thereof, and a cover-plate arranged to overlie the ends of such strip at the corners of the frame, the channel being deeper at f such points, whereby the said plates also lie below the level of the outer flange of the channel.

7. In a screen, a channel-shaped frame having the inner flange lower than the outer, and a wire holding molding comprising a strip of sheet metal bent over upon itself, and provided with a lip adapted to overlie the said inner flange of such channel-shaped frame.

In testimony whereof I have aflixed my signature, in presence of two witnesses.

EDWARD T. BUBROWES.

Witnesses:

IDA S. MoNArRN, NELLIE E. REABDON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. c."

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