US1844087A

US1844087A - Window screen

Info

Publication number: US1844087A
Application number: US339770A
Authority: US
Inventors: Boden George
Original assignee: Scovill Inc
Current assignee: Scovill Inc
Priority date: 1929-02-14
Filing date: 1929-02-14
Publication date: 1932-02-09
Anticipated expiration: 1949-02-09

Description

G. BODEN WINDOW SCREEN Feb. 9, 1932.

Filed Feb. 14, 1929 avwmwoz 1 gun a Y5 442M) 55 M a r tweaks Patented Feb. 9, 1932 Umren STATES- raxrarrr or fice GEORGE BODEN, OF WATERBURY, CONNECTICUT,'ASSIGNOR TO SCOVILLE MANUFAC- TUBING COMPANY, OF WATERBURY, CONNECTICUT, .A CORPORATION OF CONNECTI- CUT WINDOW SCREEN Application filed February 14, 1929. Serial no. 339,770. I

This invention relates to window screens and more particularly to screens of the expansion or adjustable type.

In expansion screens one frame section overlaps another and the two sections are relatively movable to make the effective screen area larger or smaller.

in order to obviate the necessity of sliding contact throughout the length of the overlapped portion, it has been proposed to associate individual bearing elements of relatively small area between the two frame sections. Such elements, however, as heretofore known, have been subject to various objections. For example, they do not give proper sliding contact; they are expensive to manufacture and difiicult to assemble; and they are liable to work loose under use.

t is an object of the present invention to provide an expansion screen having individual bearing elements, such that these ele ments are economical to manufacture and assemble; such that they are firmly held in place; and such that the screen sections have easily sliding action without sticking.

With these general objects in view the invention consists in the features, combinations, details of construction and arrangements of parts which will first be described in connection with the accompanying drawings, and then more particularly pointed out.

In the drawings:

Figure 1 is a perspective view, with'parts' broken away and in section, of an expansion screen constructed in accordance with the invention;

Figure 2 is a sectional view (enlarged) taken on the line 2-2 of Fig. 1; and

Figure 3 is a perspective view of a bearing element removed and enlarged.

Referring to the drawings, the screen illustrated as an example comprises two wooden frame sections. One section, which may be termed the inner section, comprises a top bar or moulding 5 and a bottom bar 6 connected at one end by an end strip 7 The other section, which may be termed the outer section, comprises corresponding top, bottom and end pieces 5", 6 and 7*. At the overlapping ends the frames are open.

Suitably secured in the frame sections are screens proper 8, 9 of wire mesh or other suitable material. At the open ends of the frame the screens have finishing strips 1O, 11. Extreme open position of the screen 15 fixed by the mutual engagement of these finishing I strips. Extreme closed position is fixed by the engagement of the top and bottom bars of one frame section with the end strip being.

thicker than the other strips to provide stop shoulders.

In the construction illustrated, the two frame sections have complementary grooves for receiving individual bearing elements.

The inner section has one or more bearing elements sliding in the groove of the outer section, and outer section has one or more bearing elements sliding in the groove of the inner section.

In the exemplification here illustrated, the top bar 5 has a groove '12, undercut upwardly as appears in Fig. 2. The top bar 5 has a bearing element-of metal having anchoring teeth which are staggered to lie in more than one plane. In the embodiment here shown as an example the bearing element is a clip 15, comprising parallel sides and a connecting top, formed from a piece of sheetv metal.

One side has a pluralityof prongs or teeth arranged to bite into the wood of the frame. As shown, four teeth are provided, the

teeth

16, 17, point in one direction and the

teeth

18, 19 point in the opposite direction. As shown,

teeth

16, 18 are straightfi. e. lie in the plane of the clip side;

teeth

17, 19 are bent iii) inwardly to lie in a different plane. The connecting top is bent inwardly to form a V.

When the clip is assembled the points of this V fit into the undercut portions of the complementary groove sections, as illustrated in Fig. 2. As there shown, the clip is anchored, by its teeth, to frame piece 5 and the other side of the clip, and part of the connecting top, slide in groove 1% of frame piece 5.

position in the grooves, the teeth biting into the relatively soft wood, thereby anchoring the clips in place. With staggered teeth, each group has to force its own way into the wood. That is, considering the clip for the position shown in Fig.2,

teeth

18, 16 cannot metal having two substantially parallel sides, one side being smooth and the other side toothed, the teeth facing in opposite directions longitudinally of said element, and a connecting portion for the two sides.

In testimony whereof, I have hereunto set my hand.

GEORGE BODEN.

merely follow the path or groove cut by

teeth

19, 17. Being staggered, they are out of line with this path and must cut their own path independently. As a result a firm anchorage is obtained that prevents the clips from working loose during sliding movements of the screen in use.

The construction described gives aneasy sliding movement without tendency to stick; the clips are economical to manufacture as they can be produced from sheet metal by a simple stamping and bending operation; and the clips are easily assembled and firmly anchored without the necessity of tools or extraneous fastenings.

VVhile the invention is capable'of various embodiments, it is noted that the clips here illustrated are adapted to use with a more or less common form of groove.

l/Vhat I claim is:

1. For use in a window screen, a sheet metal sliding member having a pair ofsides and a connecting portion, said member being substantially M-shaped in cross section,'one

of said sides having teeth pointing in diflerent directions. I

, 2. A bearing element forfrielatiyely sliding members comprising a unitary piece of sheet metal having two substantially parallel sides, one side being smooth and-free of teeth and the other side toothed, and a connecting portion for the two sides.

3. A bearing element for relatively sliding members comprising a unitary piece of sheet metal having two substantially parallel sides, one side being smooth and the other I side toothed, the teeth being staggered in different planes, and a connecting portion for the two sides.

4. A bearing element for relatively sliding members comprising a unitary piece of sheet