US2270202A - Screen for windows - Google Patents

Description

Jan. 13, 1942. E. s. PERSSON SCREEN FOR WINDOWS Filed March 28, 1940 INVENTOR. Ema SIGFRID PERSSON BY A ORNEYS.

Patented Jan. 13, 1942 UNITED STATES PATENT OFFICE 6 Claims.

My present invention relates to a screen for windows, and more particularly to. screens for windows of the types provided with a frame and a sash which, in opened positions, form between them at least one rectangular opening and atleast two triangular openings.

The main object of my invention is to provide a screen of the kind indicated ensuring an adequate engagement between the different screen members to provide for sufficient tightness of the joints between the same.

Another object of my invention is to provide a screen of the kind indicated in which said tightening effect is achieved by very simple means using the screen members themselves for said purpose without any additional parts.

Other objects and characteristics of my present invention will be apparent from the following description having reference to the appended drawing, in which:

Fig. 1 is a diagrammatic view showing the window in opened position,

Fig. 2 shows a perspective view, drawn to an enlarged scale, of the corner marked II in Fig. 1, certain parts being cut away for the sake of clearness,

Fig. 3 shows a similar View, also to an enlarged scale, of the corner marked III in Fig. 1, certain parts being cut away also in this case, and

Fig. 4 shows a partial sectional view of a modified embodiment.

Fig. 5 is a sectional view of the screen roller.

In the embodiment of my invention illustrated in the drawing, a sash I is mounted in a frame 2 in such a way that it can be turned about a horizontal axis AA at about the middle of the height of said sash. The sash I is shown opened to a certain extent, the position illustrated corresponding to a maximum ventilation position.

In the top and bottom pieces 2a and 2b of the frame, rollers 3 and 4, respectively, are mounted on which screen members 5 and 6, respectively, are wound. Said rollers 3, 4 are provided with springs 4b between rods 4!: and the rollers in the manner well known from common roller blinds. The free edge of each of said screen members 5, 6 is detachably fastened to the sash in any known manner. For instance, said free edge is provided with a bar I, which is detachably secured to the sash by means of latches 8 of any suitable type.

In order to ensure proper tightness between the frame members 2a, 2b and said rollscreens 5 and 6, respectively, said frame members are each designed so as to provide an edge I0 and II, respectively, engaged by the screen surface at least when the screen members are unrolled from their rollers to a certain extent.

The upper triangular openings between the frame and sash, and the rollscreen 5, one of which is shown in Fig. 2, are each covered by a screen member I2 positioned at the inside of the window and, in the embodiment shown, comprising a single sheet metal plate of approximately the same shape as the triangular opening to be covered. The screen member I2 can be perforated or not. It can also comprise a netting provided with a frame.

Said plate I2 is provided with a flange I3 having a number of slots I4 of the outline illustrated to enable it to be slid onto buttons I5 in a manner known per se, so as to make it readily detachable from said frame 2.

At the opposite edge said plate I2 is provided with another flange I6 projecting in the opposite direction and thus forming an abutment surface for the sash I. At the top said plate I2 is provided with a third flange I'I bent so as to form a curve as, for instance, a circle having its centre in or adjacent to the axis of rotation of the sash I. Said curved flange N forms a support for the edge portion of the screen member 5. Since said screen member 5 is subjected to the spring actionof the roller 3, it has a tendency to occupy a straightened out position, said tendency being counter-acted by the curved flange I'I forcing said edge portion of the screen member 5 to assume a shape in accordance with the curvature of said flange II, thus causing the formation of a tight joint between the plate I2 and the screen member 5.

The lower triangular openings are each covered by a similar plate I8, certain features in connection with said plate I8, however, being different from the plate I2. Thus, said plate I8 is provided with a flange I9 corresponding to the flange I3 in respect of its structure but serving to secure the plate I8 not to the frame 2 but to the inside of the sash I, as shown in Fig. 3.

It is evident, therefore, that said plate I8 will participate in the movements of the sash I, a slot 20 being provided in the bottom piece 2b of the frame 2 to allow for the passage therethrough of a flange 2| of the plate I8, said flange 2| corresponding to the flange II of the plate I2. Another flange 22 corresponding to the flange I6 of plate I2 forms an abutment for engagement with the inside of the frame 2, when the sash is occupying the position illustrated.

It should be obvious then, that the curved flange 2! coacts with the screen member 6 for achieving the same object as the flange I! of plate l2. Both plates I2 and I8 can be provided with depressed ridges 23, 24, partly for stiffening the plates, and partly for contacting with the adjacent members of the sash l and frame 2, respectively, when the sash is occupying intermediary ventilation positions. Hereby a tightening effect between said parts can be obtained also in said intermediary ventilation positions.

In a modified embodiment shown in a sectional view in Fig. 4 similar ridges 25 are substituted for the flange 19, as far as the tightening action is concerned, the plate I8 is in this case being fastened to the sash I by suitable means at the top and the bottom of said plate only.

The embodiments of my invention illustrated and described are intended as exemplifications only and must not in any respect be considered as limitations, since several modifications can be made without departing from the spirit of the invention.

Among said modifications, it may be men tioned that the flanges I1, 2| need not be evenly curved, as shown, but any other shape is included in the protection as long as a satisfactory engagement between the flange and the screen is provided. As regards the screen members #8 and 6, advantage could also be taken of: the fact that said plate I3 is lowered, when. the window sash is being moved from its closed position towards its maximum ventilation position, since the axis of rotation of the sash lies outside of the inner sash surface to which the plate i8 is secured.

When the sash is to be moved further than to its maximum ventilation position, the screen members will have to be detached. As far as the triangular screen members are concerned, this could be avoided by eliminating the flanges l6 and 22 and securing the plates l2 and I8 to the frame sash, respectively, by means of hinges in connection with springs urging said plates towardswards the sash and the frame, respectively.

Should it for any reason be desirable, the rollers of the rolls screens can, of course, be mounted in the sash instead of in the frame.

What I claim is:

1. In a window of the type having a sash mounted to pivot in a frame so as to form, in opened positions, at least one rectangular opening and at least two triangular openings between the frame and sash, a roller rotatably mounted in the frame at said rectangular opening, a

screen member wound on said roller, means for detachably securing the free edge of said screen member t the sash, means tending to maintain the unrolled portion of said screen member in a strained condition, another screen member at each of said triangular openings, means for detachably securing said last-mentioned screen members to the sash in positions where they cover said triangular openings, slots in the frame for the passage of said lastmentioned screen members, and said lastmentioned screen members engaging the unwound portion of. the firstmentioned screen member in a way to force said portion out of its normal extended shape in order to ensure suflicient tightness between the screen members.

2. In a window of the type having a sash mounted t pivot in a frame so as to form, in opened positions, at least one rectangular opening and at least two triangular openings between the frame and sash, a roller rotatably mounted in the frame at said rectangular opening, a screen member wound on said roller, means for detachably securing the free edge of said screen member to the sash, means tending to maintain the unrolled portion of said screen member in a strained condition, another screen member at each of said triangular openings, means for detachably securing said lastmentioned screen members to the frame in positions where they cover said triangular openings, ridges on the surface of said lastmentioned screen members for engaging the sash, and said lastmentioned screen members engaging the unwound portion of the firstmentioned screen member in a way to force said portion out of its normal extended shape in order to ensure sufficient tightness between the screen members,

3. In a window of the type having a sash mounted to pivot in a frame so as to form, in opened positions, at least one rectangular opening and at least two triangular opening between the frame and sash, a roller rotatably mounted in the frame at said rectangular opening, a screen member wound on said roller, means for detachably securing the free edge of said screen member to the sash, means tending to maintain the unrolled portion of said screen member in a strained condition, another screen member at each of said triangular openings, means for detachably securing said lastmentioned screen members to the sash in positions where they cover said triangular openings, ridges on the surface of said lastmentioned screen members for engaging the sash, and said lastmentioned screen members engaging the unwound portion of the firstmentioned screen member in a way to force said portion out of its normal extended shape in order to ensure sufficient tightness between the screen members.

4. In a window of the type having a sash mounted to pivot in a frame so as to form, in opened positions, at least one rectangular opening and at least two triangular openings between the frame and sash, a roller rotatably mounted in the frame at said rectangular opening, a screen member wound on said roller, means for detachably securing the free edge of said screen member to the sash, means tending to maintain the unrolled portion of said screen member in a strained condition, another screen member at each of said triangular openings, means for detachably securing said lastmentioned screen members to the frame in positions where they cover said triangular openings, flanges on said lastmentioned screen members, and said flanges being curved towards the firstmentioned screen member, so as to force it out of its normal extended shape in order to ensure sufiicient tightness between the screen members.

5. In a window of the type having a sash mounted to pivot in a frame so as to form, in opened positions, at least one rectangular opening and at least two triangular openings between the frame and sash, a roller rotatably mounted in the frame at said rectangular opening, a screen member wound on said roller, means for detachbly securing the free edge of said screen member to the sash, means tending to maintain the unrolled portion of said screen member in a strained condition, another screen member at each of said triangular openings, means for detachably securing said lastmentioned screen members to the sash in positions Where they lar opening, a screen member wound on said roller, means for detachably securing the free edge of said screen member to the sash, means tending to maintain the unrolled portion of said screen member in a strained condition, another screen member at each of said triangular openings, means for detachably securing said last mentioned screen members to one of the contiguous window members in positions where they 10 cover said triangular openings.

ERIC SIGFRID PERSSON.

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