US2239006A - Roller screen attachment for windows - Google Patents

Description

April 22, 1941.

P. KRYWON IS ROLLER SCREEN ATTACHMENT FOR WINDOWS Filed Jan. 26, 1939 2 Sheets-Sheet 1 April 22, 1941. P. KRYWONIS ROLLER SCREEN ATTACHMENT FOR WINDOWS Filed Jan. 26, 1939 2 Sheets-Sheet 2 hrmrar A/fywon/Zs dg 'w r Patented Apr. 22, 1941 ROLLER SCREEN ATTACHMENT FOR WINDOWS Peter Krywonis, Winnipeg, Manitoba, Canada Application January 26, 1939, Serial No. 252,965 In Canada January 24, 1938 2 Claims.

My invention relates to improvements in roller screens for windows and a principal object of my invention is to provide a device of the character herewithin described which automatically unwinds a screen to extend across a window when the window sash thereof is raised and rewinds said screen when said sash is lowered.

A further object of my invention is to provide a device of the character herewithin described in which the roller screen may or may not be raised or lowered simultaneously with the window sash.

A further object of my invention is to provide a device of the character herewithin described in which the roller screen is maintained taut at all times.

A further object of my invention is to provide adevice of the character herewithin described in which the wire screen thereof is not exposed to the elements when the window is shut and the screen is not required.

A still further object of my invention is to provide a device of the character herewithin described which may be economically manufactured, is of simplified and attractive appearance and cannot easily become out of order.

With the above more important objects in view and such other minor objects as may appear as the specification proceeds, my invention consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, reference being had to the accompanying drawings, in which- Figure 1 illustrates my invention in situ in a window casing and shows the screen thereof extended over the resulting opening when the window sash is raised.

Figure 2 illustrates my invention in situ in a window casing and disengaged from the raised window sash.

Figure 3 is an enlarged sectional view taken along the line 3--3 in Figure 1.

Figure 4 is a sectional view taken along the line 4-4 in Figure 3.

Figure 5.is a detailed view of my catches for securing the roller housing of my invention to the window sash.

Figure 6 is a sectional view taken along the line 6-6 in Figure 5.

In the drawings like characters of reference indicate corresponding parts in the different figures.

In the installation of my invention upon a window casing l, the first step lies in the removal of the conventional guide moulding (not shown) over the length of travel of the movable window housing sash 2. My invention now consists in positioning a pair of angle irons 3 in place of the removed moulding, such that the sides 3 thereof lie flush with the face ofthe sash 2 at the intersection of the sash and the side members 4 of the casing l. A pair of racks 5, having the toothed edges 6 thereof facing outwardly from the sash 2, are placed against the sides of the angle irons 3 which are flush with the casing side members 4, and by means of screws 1 extending through registering drill holes 8 provided in the angle irons 3 and racks 5, these members are together secured to the side members 4 of the window casing. It may here be noted that the plain edges 9 of the racks 5 are spaced apart from the sides 3' of the angle irons 3 to form a pair of vertical channels W for a purpose later to be described.

The central portion of my invention lies in a housing II, the cross-sectional configuration clearly illustrated in Figure 3 of the accompanying drawings, which consists of front, top and back portions, l2, l3 and M respectively, preferably formed of a single sheet of metal. The ll extends horizontally between the window casing side members 4 and has end pieces I5 inset slightly in the end portions thereof and secured therein. These end pieces ii are provided with outwardly projecting flanges l6 formed upon the forward edges thereof, which together with the adjacent edges of the housing front I2, project slidably into the channels I0 and serve to prevent unauthorized movement of the roller housing I l away from the sash 2.

Within the housing II, a main roller I1 is positioned and is provided with steel shafts l8 secured concentrically upon the ends thereof and extending rotatably through the apertures I9 in the end pieces l5. Upon the outer ends of the steel shafts l8, pinions 20 are secured in engagement with the racks 5. A length of wire screen 2|, of a width slightly greater than the distance between the angle irons 3, is secured at one end about the roller l1 and extends over a guide roller 22, which is positioned adjacent the front l2 of the housing and is provided with trunnions 23 formed at the ends thereof upon which it is rotatably journalled in aligned apertures 24 formed in the end pieces l5. The function of this roller is to maintain the screen in the vertical when exposed, as otherwise it will be seen that the plane of the same would incline rearwardly to an increasing extent when unrolled due to the different vertical planes in which the corresponding portions of the perimeters of the rollers I"! and 25 are located.

The lower end of the screen 2| is then secured for a. short distance about a spring actuated roller which extends between the window casing side members 4 and is positioned adjacent the windovf sill 26 such that the surface of the sill is practically tangential to the portion of the screen 2| upon the roller 25. This roller 25 is of the conventional type commonly used in window blinds and having a coil spring 25" extending therethrough, and is mounted at each end in the conventional fixtures usually employed, its sole but important purpose being to keep the screen 2| taut and to give slightly as the screen 2| is wound an increasing number of times upon the roller II, which thereby increases the effective diameter of the roller [1 plus the amount of screen wound with each revolution thereof. The importance of this feature will be realized when it is noted that there is only one point in the position of the sash in its frame when the diameter of the sprockets will coincide with the diameter of the roller I! plus the amount of screen wound thereon. At all other points, the diameter of the latter must be more or less so that flexibility must be introduced to prevent sagging of the screen or undue tautnessthereof.

To secure the roller housing II to the Window sash 2, a pair of brackets 26 are provided, each of which consists of a strip of metal secured upon the front of the housing at a short distance from one end thereof. The upper ends of the brackets 26' project above the top of the housing H and are provided with circular apertures 21 formed therein and communicating via the slots 28 with the upper edges thereof. A pair of small rectangular plates 29 are inset in the face of the sash 2 in alignment with the brackets 26" and are provided with apertures 30 formed centrally therein, behind which recesses 3i of slightly larger diameter are formed. In each of the apertures 30, a key 32 is pivotally received and is maintained therein by means of a head 33 upon the inner end thereof. The shank 34 of each key is formed'into the cross-sectional configuration most clearly illustrated in Figure 6- of the accompanying drawings, and the outer end of each key 32 is provided with a finger-piece 35, whereby the shanks 34 may be turned sidewise to permit passage through the slots 28 into the recesses 21, wherein the keys 32 may then be retained by imparting a quarter turn to the shanks 34 to cause them to assume the position illustrated in Figures 5 and 6 of the accompanying drawings.

Finally, each key 32 is provided with a portion of enlarged diameter 36 which has a pair of diametrically opposed cams 31 formed in the inner face thereof which are designed to bear against the surface of the bracket 26' when the shank 34 of the key is in the recess 21 in the position illustrated in Figure 6 of the accompanying drawings, at which time the finger-pieces are vertically disposed.

With the various parts of my invention in the 7 upon the roller housing II remains upon the sill position most clearly illustrated in Figure 2 of the accompanying drawings, the sash 2 may be lowered until the keys 32 engage with the brackets 26', after which the finger-pieces 35 are 26 as the window is opened. It may here be noted that a recess 38 is formed in the roller housing I I and end pieces 15, to accommodate the spring roller 25 when the lower edge 39 of the housing is flush with the sill 28, at which time of course, the lower edge 43 of the sash 2 will also be flush with the recesses portion ll of the sill 23.

Since various modifications can be made in the above invention, and many apparently Widely different embodiments of same, made within the scope of the claims without departing from the spirit and scope thereof, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense and I desire only such limitations placed thereon as are specifically expressed in the accompanying claims.

What I claim as my invention is:

1. In combination with roller screen attachments for windows including a movable sash and a detachable screen roller housing positioned thereon, means for detachably securing said housing to said sash, said means comprising in combination, a pair of brackets secured to said housing adjacent the face of said sash, said brackets having open-ended slots formed therein, said slots being widened at their lower ends into substantially circular recesses, a pair of keys aligned with said slots and pivotally secured in the face of said sash, fingerpieces upon the outer ends of said keys, a circular flange formed medially the length of said keys, a pair of diametrically opposed cams on the surface of said flange adjacent said sash and a portion of substantially rectangular configuration on the shank of said keys, said portion being receivable through said slots into said recesses and retained therein upon rotation of said fingerpieces through approximately said cams simultaneously bearing against the adjacent surface of said brackets to prevent undesired rotation of said keys.

2. In a windable roller screen assembly wherein one end of said screen is attached to a windowsill, a screen roller housing releasahly connected to the lower edge of a sash, said sash being slidably positioned in a frame, angle-bar secured vertically to each side of said frame, one of the flanges of said bar lying in the plane of said sash and parallel with but spaced from the stiles of said sash to provide a vertical track on each side of said frame, a toothed rack on said bar and lugs on the ends of said housing engageable with said tracks. 7

PETER KRYWONIS.

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