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Publication numberUS3111163 A
Publication typeGrant
Publication dateNov 19, 1963
Filing dateJun 9, 1960
Priority dateJun 9, 1960
Publication numberUS 3111163 A, US 3111163A, US-A-3111163, US3111163 A, US3111163A
InventorsHarry Nelson
Original AssigneeArtcraft Venetian Blind Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Roll-up venetian blind
US 3111163 A
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Description  (OCR text may contain errors)

Nov. '19, 1963 H. NELSON ROLL-UP VENETIAN BLIND 3 Sheets-Sheet 1 Filed June 9, 1960 3 1 5 E C E 05 N Z 2 W 5M w v V I T N 9 w m Tr H 4 f// 7/0 By Nov. 19, 1963 H. NELSON 3,111,163

ROLL-UP VENETIAN BLIND Filed June 9, 1960 3 Sheets-Sheet 2 V II mnua! II "all" llllllllillllplll.u".wlllpillllllllllllllll my:


BY Wad, n TOR/J Ks Nov. 19, 1963 H. NELSON ROLL-UP VENETIAN BLIND 3 Sheets-Sheet 3 Filed June 9, 1960 6- MM Q 1 M E m w w. VY A we H I. a, 5

3,111,163 BULL-UP VENETIAN BLIND Harry Nelson, St. Louis, Mo assignor to Artcraft Venetian Blind Manufacturing Company of St. Louis, St. Louis, Mo, a corporation oi Missouri Filed June 9, 196 3, Ser. No. 35,048 6 Elaims. (Q1. I6ll23) This invention relates to a blind structure and more particularly to a blind that is raised and lowered by rotation of the member to which the blind is attached.

There are two types of blinds generally available at the present time. One is the type that is raised and lowered by pulling a cord and opened and closed by pulling another cord. The other is a roll-up blind or shade that rolls from the bottom. The latter type may not be opened and closed by varying the angle of the slats. Both types when raised produce a bunching of the slats at the lower end. In the one type mentioned, this bunch ing results when the lowermost slats are raised against successive ones of themselves. In the other type mentioned, the bunching results because the roll is produced by rolling the blind from the bottom.

The blind of the present invention combines all the features desired in a blind. It can be opened to admit light and air or can be closed to achieve privacy. It can be raised and lowered by rolling, but with complete absence of a visible bundle or bunching because it is rolled from the top. In short, the blind is one that comprises tiltable slats that can be rolled up in much the same way as a window shade. The above sets forth a primary object of the invention.

Conventional Venetian blinds have separate means for raising and lowering the blind from the means that causes the blind to open and close. The present blind performs functions similar to these conventional blinds, that is, the blind of the instant invention can be raised and lowered and the slats that make up the blind can be pivoted between horizontal or open and vertical or closed positions. One of the features of the invention that is quite ditlerent from the conventional blind so that both the raising and lowering of the blind and opening and closing of the blind are accomplished by a single operating means. This diiierence is one of the principal objects of the invention. It means that the blind does not require the conventional types of hardware needed for tilting the slats.

An important object of the invention is to provide a means for raising and lowering the blind and is locked without requiring any additional manipulation of a pull cord other than to release it. In conventional Venetian blinds the cord that raises and lowers the blind must be swung over to a toothed catch before the blind is locked in place. In the present invention, the locking means operates automatically upon release of the pull cord.

Another object of the invention is to provide a Venetian blind that is suspended from a rotatable member with a cord for rotating the member and thereby for raising and lowering the blind, wherein the weight of the blind provides part of the means for locking the cord against counterrevolution after it has been rotated in a blind raising direction.

Still another object of the invention is to provide a Venetian blind having a plurality of slats suspended from a rotatable member by very thin cord means and wherein the slats are of narrow and thin construction, so that when the slats are pivoted to a horizontal or open position, both the slats and the cord means that suspend the slats will provide a relatively unobstructed view through a window opening.

Still another object of the invention is to provide a atent i ice Venetian blind suspended by a rotatable member, wherein the blind comprises a plurality of slats that can be pivoted between a horizontal or open position and a vertical or closed position and the blind can be raised or lowered by rotating the member from which it is suspended and wherein there is a single means for both openin and closing the blind and raising or lowering the blind.

Another important object of the invention is to provide a Venetian blind that is adaptable to being mounted above an opening in a building in pairs, with one blind being suspended from a rotatable element with a space between the uppermost part of the blind and the rotatable element when the blind is fully lowered, and wherein the other blind is suspended from an element with little or no space between the uppermost part of the blind and its rotatable element so that when both blinds are lowered, the lower part of the building opening will be covered by one of the blinds and the upper part by the other blind, whereby the pair of blinds may be used in a variety of decorative ways including the presentation of a cafe curtain eliect.

Yet another object of the invention is to provide a Venetian blind suspended from a rotatable element wherein the element is releasably attached to bracket means mounted to a wall surface.

In the drawings:

FIGURE 1 is a front elevation view of the Venetian blind with the blind fully lowered;

FIGURE 2 is a front elevation view of the Venetian blind with the blind halfway lowered;

FIGURE 3 is a partial front elevation view with the blind completely raised;

FIGURE 4 is a partial enlarged front elevation view of the top portion of the Venetian blind with the cover removed and the blind fully lowered;

FIGURE 5 is a view similar to that of FIGURE 4 but with the blind partially raised;

FIGURE 6 is a view similar to FIGURE 4, but with the blind rolled all the way up;

FIGURE 7 is a greatly enlarged view taken along the line 7-7 of FIGURE 1;

FIGURE 8 is a greatly enlarged view taken along the line 8-8 of FIGURE 1;

FIGURE 9 is a view in section and partially broken away, taken along the line 99 of FIGURE 7;

FIGURE 10 is a view in section taken along the line Iii1il of FIGURE 9;

FIGURE 11 is a View in Ill-ll of FIGURE 9;

FIGURE 12 is a view in 12-12 of FIGURE 9;

FIGURE 13 is a view in 131l3 of FIGURE 12;

FIGURE 14 is a partial view taken from the left end of FIGURE 9, out with the cover plate removed to show the mechanism of the locking means for the Venetian blinds;

FIGURE 15 is a side view of the pulley;

FIGURE 16 is a top view of a cover plate;

FIGURE 17 is a side elevation view of the cover plate of FIGURE 16;

FIGURE 18 is a typical, transverse cross-section through the Venetian blind with the blind completely lowered;

FIGURE 19 is a view similar to FIGURE 18 but after a slight rotation has been imparted to the drum;

FIGURE 20 is a view in section similar to FIGURE 18 wherein the drum has been further rotated;

FIGURE 21 is a partial view of the top portion of the Venetian blind showing a modified form of the means for attaching the Venetian blind to the drum;

FIGURES 22 through 28 represent a modified form of section taken along the line section taken along the line section taken along the line 3 the invention with particular emphasis on different structure for the means for rotating the drum;

FIGURE 22 is an enlarged partial view in section of the left end of the Venetian blind;

FIGURE 23 is a view in section taken along the line 2323 of FIGURE 22;

FIGURE 24 is a view in section taken along the line 2424 of FIGURE 23;

FIGURE 25 is a view in section through the drum show ing the way the pull-cords are attached;

FIGURE 26 is a view of the locking clip for the cord;

FIGURE 27 is a view in section taken along the line 27-27 of FIGURE 26;

FIGURE 28 is an enlarged end view of the cord-retaining clip of FIGURE 26 taken from the right side of FIG- URE 26 showing the clip before it has been bent around a cord;

FIGURES 29 through 33 represent a particular embodiment of the invention wherein two of the Venetian blinds are mounted in generally superposed relationship so that a cafe curtain effect can be obtained;

FIGURE 29 is a front elevation view showing both Venetian blinds all the Way down;

FIGURE 30 is a partial front elevation view showing the upper Venetian blind all the way down;

FIGURE 31 is a front elevation view showing the lower Venetian blind all the way down and the upper Venetian blind all the way up;

FIGURE 32 is a partial front elevation view showing the lower Venetian blind all the way down and the upper Venetian blind part of the way down; and

FIGURE 33 is an end view of the double Venetian blind arrangement showing the relationship between the superposed Venetian blind.

Referring now to the drawings, FIGURE 1 shows the assembled Venetian blind 39 mounted to a suitable surface 31 by a cover structure 32. The cover structure includes two side cover plates 33 and 34 attached by screws 35' to the surface 31. Each of the side plates 33 has a rear edge 36, a bottom edge 37 perpendicular to the rear edge and a curved surface 38 joining the top of the rear edge 36 and the outward end of the bottom edge 37.

An elongated and curved front cover plate 39 conceals the edges 38 of the end plates 33 and 34 and is attached by screws 40 to inturned flanges 41 of the end plates 33 and 34-.

Each of the plates 33 and 34 has suitable mounting means formed in it for supporting the Venetian blind. The plate 33 has a hole 45 through it, and rotatably fastened to the hole by means of a rivet 46 is a pulley 47. There is a bearing washer 48 between the pulley 47 and the plate 33. The pulley 47 has an outwardly directed hook 49 toward its periphery, and opposite to the hook 4-9 is a pin 50.

The supporting member for the Venetian blind comprises a hollow drum or cylinder 54. The open ends of the cylinder or drum 54 are covered by flanged caps 55 and 56, the flanges of which are inserted into the hollow drum 54. The end cap 55 has a pair of holes 57 through it. The opposite end cap 56 has a stud 53 attached to its center, the stud 58 having a head '59 on it. The end cap 34 has an inwardly extending boss 6% that has a key slot 61 through its center. Thus, the drum 54 is secured between the end plates 33 and 34 by first hooking one hole 57 onto the hook 49, then pivoting the drum 54- until the pin '50 passes through the other hole 57, and thereafter sliding the stud '58 into locking engagement with the key slot 61. When so mounted, the drum 54 can freely rotate between the plates 33 and 34.

The blind itself comprises a plurality of very thin slats 65 which are preferably formed of a suitable metal and grooved slightly. The slats differ from the conventional Venetian blind slats in that they have a maximum width of approximately one inch. And furthermore, when the slats, as a group, are viewed edgewise, as they might be viewed by one looking through an open blind and through a window, they are barely visible. The fact that they are painted white adds to the effect. There are certain features of the present invention that do not depend primarily upon the size, shape or color of the slats, but the importance of this description will be apparent when other aspects are described.

here are a plurality of cords 66-, 67 and 63 wrapped about the drum 54 and taped by a suit-able tape 69 at the drum. However, the free ends 7t), 71 of the cords 66, (57 and 6 a depend from the drum 54 in pairs spaced apart by a distance approximately equal to the width of the slats 65.

Between each pair of free ends 7% land 71 is attached a cord 72, and from the middle of the cord 72 with respect to the end cords 66 and 68, there hangs a cor-d 73. There are a number of short cords 74 attached between the free ends 7% and 71 of each cord 66, 67 and 68. The short pieces 74 are spaced vertically by the distance it is intended to space the slats 65. All of the cords are very thin, braided nylon, preferably white in color so that they will be practically invisible in sunlight.

When each of the cord ends 76 and 71 is hanging directly vertically from the drum 54, as illustrated in FIG- URE 18, the cords will be horizontal. Then when the drum is rotated in a manner to be described as illustrated in FIGURES 19 and 20", one of the cord ends 79 or 71 will be raised first thereby interrupting the horizontal position of the short pieces 74.

Each of the slats '65 has :a transverse elongated aperture 77 through it adjacent each of its ends in as many places as there are cords 66, 67 and 63, and these apertures 77 are intended to permit the center cord 73 to pass through them. Thus, each slat is supported upon the several short cord pieces 7 4 that lie in the same horizontal plane, and the center vertical cords 73 adjacent each side of the blind pass through each of the apertures 77 to keep the slats 65 from sliding longitudinally. At the bottom of the blind is a single thicker slat 73 to which all the vertical cord pieces 73, 71 and 73 are attached.

A heavier cord makes almost :a complete revolution about the pulley 47. The free ends 85 and 87 of the cord 85 hang below the pulley. It is preferable that the cord 85 be a continuous loop, although such is not required.

There are a pair of guide blocks 83 and 89 attached by screws 96} to a plate to be described. The guide blocks 38 and 89 have inner ends 91 and 92 that are spaced apart a distance slightly greater than twice the thickness of the cord 85. The upper surfaces 33 and 94 of the blocks 83 and 89, respectively, are arcuate and are spaced from the pulley 47 by an appropriate distance that will maintain the cord 35 within the groove of the pulley above the free ends '36 and 87 which hang down between the ends 91 and 92 of the blocks 38 and 89.

There is a plate 95 pivotally attached with the block assembly 33, 89 by a rivet or the like 96 to the end cover plate 33. The cover plate 95 has an upper surface 97 that includes an arcuate portion 98 of slightly less radius than the radius of the arcuate surfaces 93 and 94 of the blocks 88 and 8?. The edge )9 of the cover plate 95 is approximately contiguous with the lower edges of the blocks 88 and '89. There is a bent plate 1% riveted to the cover plate 33 with a free end 1% spaced from the cover plate 33. The end 132 of the plate 95 opposite the rivet 96 fits between the end 131 of the plate 1% and the cover plate 33. A leaf spring 193 riveted to the cover plate 33 resiliently resists downward pivoting movement of the free end 162 of the cover plate 95.

Secured to the cover plate 95 by means of the screws 93 is another leaf spring which is considerably wider than the space between the ends 31 and 532 of the blocks 88 and 89, and the lower free end 1% of the leaf spring 1&5 is headed. The free end 166 of the leaf spring 1% is biased toward the cover plate 33 and tends to press the free ends 86 and 87 of the cord 85 against the end plate 33. The holding pressure of the leaf spring 195 is greater than the force resulting from the weight of the slats 65 depending from the drum 54.

The way that the Venetian blind thus far described is operated, involves the manipulation of only a single cord 85 to both raise and lower the slats 65 and also to pivot them between an open and closed condition, as well as various conditions therebetween. Assuming that the blind is all the way down, as illustrated in FIGURES 1 and 18, the free ends 86 and S7 or" the cord 85 will be hanging fairly straight, as illustrated in FIGURE 12. The condition of the thin cords 7t 71 and 72 of the slats 65 will be as illustrated in FIGURE 18. In this condition, the Venetian blind is open. That is, the slats 65 are horizontal and will obstruct very little vision through a window opening. The fine cords 70, 71 and 72 are also practically invisible.

When it is desired to close or partially close the slats 65, they must be pivoted so that they assume positions tending toward a vertical plane. The only required action is that a force be applied to one of the free ends 85 or 87 of the cord 85. When one of those free ends is pulled, the drum that is attached to the pulley 47 will be rotated. Upon rotation of the drum 54, as for example in a clockwise direction as viewed in FIGURE 20, the free ends 713 will be raised somewhat while the other free ends 71 will be slightly lowered upon initial rotation of the drum 5 1. This condition of the cords 719 and 71 will cause the short cord pieces 74 to be slanted, slanting with them the slats 65 that they support. The result is a partial closing of the Venetian blind upon pulling on one of the free ends 86 or 87 of the cord 85. During this action, the center cords 73 keep the slats 65 from sliding longitudinally.

If the other of the free ends 86 or 87 is pulled so that the drum is rotated in a counterclockwise direction as viewed in FIGURE 19, the cord 71 would be the one that would be raised while the cord 70 would be lowered slightly. This action would cause the slats 65 to slant in the opposite direction.

Once either of the free ends 86 or 87 of the cord 85 has been pulled so that an opposing load on the drum 54 is exerted by the weight of the slats 65 tending to unwind the drums 54, this opposing load will be resisted in part by the force of the leaf spring 1115. The leaf spring 195 arrests the sliding of the free ends 85 and 87, and, once arrested, the drum 54 will reverse its rotation (a slight amount) in response to the opposing force of the weight of the slats 65 causing the cord 56 or 87 (whichever had een pulled) to become bunched between the leaf spring 155 and the pulley :7. This bunching of the cord can be seen in FIGURE 14. The bunching of the cord further crimps the space between the ends 91 and 132 of the blocks 83 and 8% so that an additional locking effect is produced against the unwinding tendency of the weight of the Venetian blind.

When further rotation of the drum 54 is desired, either to further close the slats 65 or to raise them by winding them about the drum 54, the free end 87 is again pulled downwardly. Such pulling on the free end will release the bunching part of the cord and cause the drum to be rotated under the pulling force.

Each time the free cord end 87 is released, the locked effect above described will take place. It can be understood, therefore, that the blinds are raised or lowered or opened or closed by the action of the single cord 85.

FIGURE 21 is a single fragmentary view of a modification of the invention wherein all of the slats 65 are cemented or otherwise attached flatwise to a plurality of tapes 110. The uppermost slat is attached by cords 111 to the drum 54, the cords 111 in turn being taped by tapes 112 to the drum 54. In this embodiment, when the cord 35 is pulled the drum 54 will rotate and raise or lower the slats 65. The slats 65 cannot be opened and closed. The means for locking the cord 85 in the embodiment of FIGURE 21 is the same as that previously described.

FIGURES 22 through 28 represent another modification of the invention. This modification is directed particularly toward changes in the means for locking the cord except when pulled, and for attachment of the cords 7t and 71 to the drum 54.

Referring to FIGURES 22, 23 and 24, there is an irregularly shaped casting having arcuate wings 121 and 122 spaced from the pulley 47 an appropriate distance to retain the cord 85 within the groove of the pulley. The lower ends 123 and 124- of the arcuate wings 121 and 122 are spaced apart by a distance somewhat greater than double the diameter or" the cord 85.

The wings 121 and 122 merge into a bracket member 125 having flanges 126 and 127 flat against the end cover plate 33. The bracket member 125 is secured to the end plate 33 by strips or" metal 128 and 129 bent out from the plate 33 and against the flanges 126 and 127. As can be seen from FEGURE 23, the flanges 126 and 127 have portions 13-19 and 131 overlying the metal strips 128 and 129 so that the bracket will not slide from between the strips 125 and 129 and the plate 33. The central portion of the bracket 125 is bent outwardly to provide an inner wall 132 and side walls 133 and 134. The distance between the side walls 133 and 134 is about the same as the distance between the lower ends 123 and 124 of the arcuate wings 121 and 122. Also, the space between the inner side 132 and the plate 33 is somewhat greater than the diameter of the cord 35.

There is an inwardly directed bead 135 from each of the walls 132, 133 and 134 so that when the free ends 86 and 87 of the cord 85 extend through the bracket 125 at the bead 135, they are restricted from sliding by the bead 135. In other words, the bead 135 slightly compresses the cord 85. When the weight of the Venetian blind is on the drum 54-, the free end 86 or 87 will bunch within the walls 132, 133 or 134 above the bead 135 in the same manner as the bunching occurs above the leaf spring 1115 with the first embodiment described.

The bracket 125 is attached to the plate 33 by first sliding the flange 126 between the metal flaps 128 and the plate 33. If the bracket 125 is slanted far enough to the left as viewed in FIGURE 23, the flange 127 can be shifted upwardly into the space between the flap 139 and the plate 33. V-Ihen the bracket 125 is then slanted part of the way back toward the right, the overlying portions 139 and 131 will prevent the bracket from slipping away.

In PTGURES 25 through 28, the modified means for attaching the cords 7t? and 71 is illustrated. In this form of the invention there is a hole 149 punched through the drum 54 for the cord 71) and another hole 141 for the cord '71. The distance between the holes 140 and 141 is approximately equal to the width of a slat 65.

To each of the cords is fastened a clip 142 that has a part 14-5 cut away and bent over upon itself. The clip 142 is attached to the cord by first inserting the cord over the top of it in its unfolded form illustrated in FIGURE 28. The clip 14-2 is then bent tightly about the cord as illustrated in FIGURE 27. The bent over portion 143 eliminates a sharp edge where the cord is bent.

The clip is held co-axially about the cord 70 and passed through the hole 148. The clip is then released so that it will assume a position substantially perpendicular to the cord 35 so that it cannot slip out of the hole 140.

PTGURES 29 through 33 illustrate a still further modification of the invention wherein a pair of Venetian blinds are mounted in substantially superposed relationship so that the blinds can be used to effect a cafe curtain appearance. This arrangement also permits the complete covering of a window by the Venetian blinds and then the opening of only one of the Venetian blinds, leaving the other closed. in this embodiment the upper of the Venetian blinds has been designated by prime numbers corresponding to the numbers already mentioned. Thus, in FIGURE 29, the upper and lower slats 65' and 65 are both fully lowered, completely covering the window. In

FIGURE 30, only the upper slats 65 are lowered While the lower slats 65 are completely raised. In FIGURE 31 the lower slats 65 are completely lowered while the upper slats 65' are completely hidden behind the cover 39. In FIGURE 32 the lower slats 65 are completely lowered while the upper slats 65' are only partially lowered. Any number of variations are possible with two Venetian blinds arranged as those in FIGURES 29-33.

Various changes and modifications may be made within the process of this invention as will be readily apparent to those skilled in the art. Such changes and modifications are within the scope and teaching of this invention as defined by the claims appended hereto.

What is claimed is:

1. A blind structure comprising a pair of brackets for attachment to a wall, a drum rotatably supported between the brackets, a plurality of pairs of cords suspended from the drum, a plurality of slats supported between the cords of each pair, a pulley connected to one end of the drum, a cord with a portion forming a loop hung over the pulley to rotate the pulley and the drum in opposite directions, guide means having arcuate surfaces beneath the pulley and close enough thereto to keep the cord within the confines of the pulley, the arcuate surfaces having a space between them opposite the lowermost extreme of the pulley and the cord having cord parts depending from the loop and extending through the space, the width of the space being substantially greater than the combined diameter of the cord parts, but being substantially less than the diameter of the pulley, and means beneath the space defining a restricted passage through which the cord parts pass, the restricted passage having opposite sides that are closer together than the diameter of the cord parts so as to compress the cord parts and provide an impedance to the passage of the cord parts through the restricted passage, the space above the restricted passage having side walls that extend far enough toward the restricted passage to prevent escape of the cord parts beyond the lateral confines of the space, the compressive force exerted by the restricted passage being sufiiciently great to cause bunching of the slack cord part when the slats are raised, the bunched cord part thereby providing a wedging block above the restricted passage of greater strength than the gravitational force tending to lower the slats.

2. The blind of claim 1 wherein the flexible means comprise pairs of small-diameter twisted fiber cord.

3. The combination ofclaim 1 wherein there are means for fastening the guide means and the means defining the restricted passage to one of the brackets and wherein G the fastening means provide for the release of these parts from their operating positions defined herein.

4. The combination of claim 1 wherein the brackets are larger in surface area than the side to the drum and slats combined when all the slats are rolled about the drum, and a hood fastened to the edges of the brackets and extending across the front of the drum above and below the uppermost and lowermost extremes of the slats when they are rolled about the drum.

5. The combination of claim 4 wherein the hood also extends across the top of the drum and slats with the juncture between the front and top extensions being curved.

6. A Venetian blind comprising an elongated member, a pair of brackets for attachment to a mounting surface, means for mounting the member for rotation between the brackets, an elongated cord having a portion looped about the member for rotating it, with the cord parts adjacent the loop hanging downwardly beneath the member, means defining the side Walls of a restricted opening through which the hanging cord parts are drawn, the side Walls of the restricted opening including a leaf spring on one side of the cord parts and a stop on the opposite side of the cord parts from the leaf spring, the restricted opening being positioned beneath the member but spaced from the member, a plurality of slats suspended from the member so that when one of the cord parts is pulled to rotate the member, the slats will be wrapped or unwrapped about the member, the leaf spring being continuously biased toward the cord parts so as to slightly compress the cord parts between the leaf spring and the stop, for thereby continuously applying a restraining force against movement of the other cord part when the one cord part is pulled, the magnitude of the restraining force being greater than the weight of the slats.

References Cited in the tile of this patent UNITED STATES PATENTS 20,013 Work c- Apr. 30, 1858 21,648 Bidwell Oct. 5, 1858 193,239 Fontayne July 17, 1877 200,099 Stanley Feb. 5, 1878 203,418 Clark May 7, 1878 1,284,123 Masumian Nov. 5, 1918 2,111,978 Lawson et a1 Mar. 22, 1938 2,129,606 Nisenson Sept. 6, 1938 2,562,259 Burns July 31, 1951 2,723,715 Kaufimann et al. Nov. 15, 1955 2,794,499 White June 4, 1957

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US20013 *Apr 20, 1858 Ctrataiet-fixttjre
US21648 *Oct 5, 1858 Rolling window-blind
US193239 *Jan 9, 1877Jul 17, 1877 Improvement in curtain-fixtures
US203418 *May 7, 1878 Improvement in curtain-roller and bracket
US290099 *Dec 11, 1883 Tower
US1284123 *Sep 11, 1917Nov 5, 1918James G MasumianWindow-frame construction.
US2111978 *Nov 19, 1934Mar 22, 1938 Venetian shade
US2129606 *Apr 19, 1937Sep 6, 1938Julius NisensonAdjustable cord lock
US2562259 *Dec 19, 1949Jul 31, 1951Columbia Mills IncVenetian blind
US2723715 *Mar 11, 1952Nov 15, 1955Carl KauffmannVenetian blind with adjustable slats
US2794499 *Nov 8, 1954Jun 4, 1957Charles B WhiteVenetian blind and mechanisms useful therein
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3253645 *Jul 15, 1963May 31, 1966Stall Orville TPull cord lock
US5419385 *Jul 29, 1993May 30, 1995Hunter Douglas, Inc.Double sheet light control window covering with unique vanes
US6112797 *Feb 9, 1998Sep 5, 2000Hunter Douglas Inc.Apparatus for fabricating a light control window covering
US6688369Jul 25, 2001Feb 10, 2004Hunter Douglas Inc.Fabric light control window covering
US6823923Mar 20, 2002Nov 30, 2004Hunter Douglas Inc.Light-control window covering and method and apparatus for its manufacture
US7059378Oct 27, 2003Jun 13, 2006Hunter Douglas Inc.Fabric light control window covering
U.S. Classification160/23.1, 160/25, 160/115
International ClassificationE06B9/28, E06B9/34
Cooperative ClassificationE06B9/34
European ClassificationE06B9/34