US1780556A - Metal slat for window shades - Google Patents

Description

Filed March 8, 1929 IN VENTORS';

ATTQRNE'Z UNITED STATES 'O' Pl iFl CEf V WALLACE KALLIN, on ST. rnonnnn nYs E BoYn'roN; bfMiNNEAPOIJISQ M MINNEsom r METAL SLA'I For: WINDOW SHADES Application filed March 8, 1929. Serial No. 345,522.

Our invention relates to an all-metal shade slat or so-called roller-shade stick used on the free end of a fabric window shade ofthe kind which normally is wound on a shade roller and rotatably mounted at the upper end of a window frame. The main object of 1 this invention is to provide a simple, efflcient and inexpensive shade stick or slat all of metal and adapted to be readily secured to the freeend of a shade as hereinafter fully set forth, reference being had to the accompanying drawing in which,

Fig. ,1 is a face view of the lower free on of a cloth Window shade and our improved metal slat attached thereto, the view being taken as looking toward the interior of a house through the window opening.

Fig. 2 is a vertical cross sectional view as on line 22 in Fig. 1 and Fig. 3 is an enlarged modification ofFig. 2. V

Fig. 4 is a perspective View of one end of our improved slat partially telescoped and a portion of the shade held bytheslat members.

Fig. 5 is an enlarged longitudinal section on a horizontal plane, of the shell of our device only, as on line 55 in Fig. 1. 2

Referring to the drawing by reference numerals, 1O designates the free end part of a cloth window shade, the other end of which is attached to a shade roller (not shown) in any suitable manner, said free end of the shade adapted to be pulled down in a vertical plane parallel with a window by means ofv a pull ring 11 with a cord 12 or directly engaging the shade slat. v

Our improved shade slat'comprises two sheet metal telescope members. of which 13 is the inner member and 14 the outer member or shell which in a modified form is designated 14X in Fig. 3, both being provided in lengths corresponding to the width of the shade to which they are to be attached. The inner slat member 13 is of sheet metal and folded to provide two parallel flanges, opening downwardly the inner flange 13A normally slightly narrower than the outer one 13B, both flanges being normally close together so as to allow insertion of the transverse free edge of the shade 10 between them,

of; the narrow the shade being folded upwardly on the edge I flange 13A and extending upwardly therefrom (see Fig. 2). The outer member 14 hereinafter designated theshell is also sheet metal and bent to form an 'elon- 5 gated. U-shape in cross section, the inner and outer flanges thereof designated respectively 14A and 14B, parallel to each other and spaced so, that the inner slat member and the cloth it holds are insertible endwise into the shell and frictionally retained, the. cloth protruding ,upwardly therefrom. Flange 14A is formed at its upper edge with a fiange14Av curved forward thence up and in, in a curvaturegas shown in Figs. 2 and 4, ca-u'singthe (is cloth to'be engaged frictionally between the upper edge of inner member13 and; said curved flange 14A. The outer flange 14B of theshell is curved or bent inwardly along its upper edge, as 14A? in Figs. 3 and 4, to engage and retain the top portion of the inner channel member. Thus the cloth of the shade protrudes from the open, upper end of the shell 14 about centrally which of course causes the shellto hang in propertvertical plane.

The shell 14' may be provided at its cen ter, on the outside wall withapunch-out halfloop 15 providing holding meansffor the pull cord 12,;asbest shown in Figs. 1 and 5.

In thejformsof our device illustrated in Figs. 1, 2, 4. and 5 thetelescoped members arecomoaratively flat as shown, whereas in Fig.8 the shell 14Xis widened out atthe bottom, this latter construction being to pro-4 vide a larger slat resembling in transverse section 'a standard shade stick of the kind commonly used. 'In'this latter case also the inner member is made about the same as preyiously-described, toretain the shade, but

its outer flange 1313 may; have vits lower edge curvedjoutwardl'y'asat 13B to frictionally V engage the bottom curvature of shell 14X and prevent rattling of the telescoped device.

In either form of the shell it is slitted or open for outlet of the shade'between its upper curved flange or edge 14A and the adjacent lower and inwardly directed edge 14A", said opening being designated 16 in Fig. 3. I Said inwardly flanged parts 14A and 14A" cause a frictional engagement of the upper edge of the inner slide member 13 and the shade material cannot slip or slide out of place when a downward pull is exerted on the device. It is obvious that in the use of our device there is no sewing of the shade material to'make a pocket,'a'seam thus made causinga weakness and being an undesirable condition which is entirely eliminated in th us Of 91 devi e- The ner meniber13'is inerely a sheet metal stfips bent to form two parallel walls and opening downwardly, said strip retaining the edge. of the shade as described and the material of said shade extending upwardly from said opening and through the slitted part of the shell. The lower flange 14A of the shell is'preferably'beveled at the ends, as 17 in Fig. 4 to prevent tearing of the shade materialwhen the inner strip is inserted endways into the shell.

' We claim:

1. In a slat for window shades of the class described normally movable in a vertical plane fIOll'ljEt roller mounting, the free edge of said shade adapted to be folded to provide a transverse upwardly directed flap parallel "to the main shade; a metal strip member detachably engaging said flap com prising an elongated' folded sheet metal strip opening downwardly and adapted to fric tiona'lly embrace said flap between its walls, the main shade arranged to be passed upwardly outside'of one or its walls; an elongated shell member adapted to be telescope d longitudinally over said strip and the part of the shade ezgteriorly of said strip to fric tionally embrace said "strip member "and shade part said shell comprising an elongated folded sheet metal strip opening upwardly and the edges of said shell fianged inwardly. V

2. The structure specified in claim 1, in which said'flanged edges are flanged inward lyone in a lower plane than the other, the

' lower flange adapted to directly engage the upper "edge of the shade retaining strip and the'upper flange directed inwardly over said strip e'dge,'thence upwardly, the shade material extending upwardly from the strip arranged to be frictionally' engagedby said upper flange to press it angular'l'y over the t op of the strip describedf In testimony whereof we afiix our signatures. 1 V

WA T-alien E. KALLIN. -r L n s" c rowrv

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