US1439540A - Window shade - Google Patents

Description

Dec. 19, 192,2. 1,439,540.

, 1.1. FOHSTER.

WINDOW SHADE. FILED MAR. 14| 1922.

FIEJI.

ldatented Dee. i9, i922.

unirse JOHN J'. FORSTER, OF MIDLAND, PENNSYLVANIA, ASSXGNOR OF yCN`..|1l-.LF TO VIILLIAM K. HART, JR., OF MDLAND, PENNSYLVANIA.

WINDOW SHADE.

Application filed March 14, 1922. Serial No. 543,580.

To aZZiUwm t may concern:

Be it known that l, .loi-IN J. Fonsrnn, residing-at Midland, in the county of Beaver and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Window Shades, .of which improvements the following is specification.

My invention relates to improvements in window shades, and consists in a shade journaled at an intermediate point of the height of the window opening together with means for drawing 'it at will in either direction, up or down, as need may be, to 'cover any portion either of the upper or of the lower subdivisions of the window area. Minor and tributary features of invention will appear in the course of the ensuing specification. p

. In the accompanying drawings Fig. l is a view in elevation of a window frame, having a shade of my invention applied to it; Figs. ll and lll are views in vertical and medial section of the same assembly. Fig. ll shows the shade drawn down part way, and in the position shown in Fig. I; Fig. III shows the shade drawn up part way. Figs. IV and V are views to larger scale, showing in front and side elevation a certain fixture which may advantageously be employed in carrying my invention into practice. Figs. Vli and VI are fragmentary views in elevation similar to Fig. IV, and illustrating permissible modifications. lt should be remarked of the drawings that, for purposes of illustration the dimensions of the window frame and the diameter of the shade roller are intentionally exaggerated, that the structure may more clearly appear. rlhis matter may be dismissed without further comment.

. he Shade l borne on a suitable spring roller is 'journalled intermediate the extent of the window space. An endless cord Q, passing over pulleys 3 and l above and below surrounds the shade; that is to say, one` reach of the cord extends behind, the other in front of the shade. At one point in its extent, preferably in the front reach the cord is secured to the edge of the shade (ordinarily hemmed and reenforced by "a stick enclosedin the hem). Manifestly as the front reach orthe rear reach of the cord is drawndownward the shade will be drawn dwnward or upward. Manifestly also the ting and of shade, having previously been it can be drawn drawn, before oppositely, should be allowed to roll up again under spring tension in usual manner. Ordinarily the spring roller of awindow shade is provided with a pawl-and-ratchet latch, to secure it temporarily at the desired degree of extension.` VHaving made the cord endless and arranged it as shown, l may and preferably do dispense with the usual latch just mentioned, and'provide for anchoring the cord in any holding the shade of anchorage arev the upper pulley with a sheave having vposition desired and so extended.v Suitable means indicated in Fig. l, where 3 is shown to be provided a helical runway. By

lateral manipulationv of the cord the tension of the spring in and so secure the the roller may cause the `cord to bind between sheave and housing shade until by tension and manipulation in opposite direction the cord will run free again.

The fixtures which carry the roller may be set at any point desired, intermediate the ends of the window opening, and the pairs of fixtures may be made capable of resetable means.

adjustment in position by suit- In Figs. l to V l show means which I find convenient and adequate. The

journal blocks themselves 5 and 6, rformed ordinarily of sheet metal, may be bolted through slots in turn are secured to the window frame.

which strips in The bolting is such as to allow the blocks to slide longitudinally of the strips, and

to allow them j ournal also to turn pivotally. The

blocks are provided with tongues 8 adapted to enter notches formed along the yedges of strips provided, is exerted to 7, and springs 9 are anged that their tension hold the blocks 5 and 6 with tongue 8 in engagement with a notch. The

bloiiks 5 and 6 are further provided with thunib rests 10, by which they may be turned pivotally against the tension of the springs to release the tongues S from the notches in the edges of strip s 7, Any desired numbers of pairs of notches may be formed in the opposite strips 7.

The two journal blocks 5 and 6 being secured by the tongue and notch turni described, their position may be ng them pivotally against and shifting them lalong ired new position and'then releasing them to turn under spring tension and make again the same engagement with another pair of notches.

Figure V I shows that instead ot vertically adjustable journal blocks, a succession of journal blocks 5a may be set along the length of the Window frame and between any opposite pair of such journal blocks the shade roller may be hung, and it may be changed from pair to pair as may be desired. Figure VII shows at 5b a journal block which may be screwed to plafe at any point desired lon` gitudinally oi the Window frame.

My invention is applicable in all sorts of places, but I nd it to be peculiarly useful when applied to the Windows of school rooms and other places of public gathering.

I claim as my invention:

l. In a Window shade structure the combination With a Window opening of a shade having a spring roller journalled at a point intermediate the length of the opening, opposite fixed abutments arranged beyond the range of shade travel, and an endless cord movable over said abutments and encircling said shade, said cord being secured at one point to the edge of the shade.

2. In a Window shade structure the combination with a window opening of a spring roller journalled at an intermediate point in the length of such opening, a shade secured at one edge to said roller, opposite abutments arranged beyond the range of shade travel, an endless cord secured at one point to the otherwise iiree edge of the shade, passing completely around shade and roller and over said abutnients, and means of which one of said abutments forms part for securing said cord from free running in response to tension of said spring roller.

3. In a Window shade structure the combination with a Windon7 frame of a pair of journal blocks adjustably carried in said Window frame at points intermediate the length thereof, a spring roller shade borne by said blocks, liXed abutments borne by said fram@ in the ends thereof and an endless cord secured at one point to the otherwise free edge of said shade, passing entirely around said shade and passing over said opposite abutments.

In testimony whereof I have hereunto set JOHN J. FORSTER.

my hand.

Witness FRANCIS J. ToMAssoN.

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