US2566191A

US2566191A - Venetian blind

Info

Publication number: US2566191A
Application number: US113344A
Authority: US
Inventors: John B Griffith; Byron C Dutton
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-08-31
Filing date: 1949-08-31
Publication date: 1951-08-28
Anticipated expiration: 1968-08-28

Description

` Allg- 28, 1951 '.1. B. GRIFFITH ETAL. 2,566,191

VENETIAN BLIND Filed Aug. 5 1, 1949 ,f l V I ATTORNEY Patented ug. 28, 1951 VENETIANBLIND John B. Griffith and Bylfon- C. Dutton-Riverside, Calif.; said Dutton assigner-to saidGrifiith Application August 31, l949,`-SerialNo.113,344

2 Claims.

This invention relates to Venetian blinds, and moreparticularly to certain improvements in the construction and arrangement thereof whereby the slats can be detached and removed therefrom with a minimum of eiiort and without disconnecting supporting straps, or lifting cords.

Among the salient objects of the invention are: to provide in Venetian blind construction an arrangement wherein the lifting cords do not pass through the slats, but at the edges thereof, whereby7 the slats can be removed without interference with the lifting cords;

To provide a supporting bar for the supporting straps and slats therebetween having a cordreceiving channel in its top side with the lifting cords running in said channel, one of them to therst pair of supporting straps and thence downwardly along the inside of one of said straps, at the edge `of the slats therebetween, and the other cordrunning in said channel to the opposite end thereof `and to the opposite side of said supporting bar and thence downwardly along the inside of the supporting strap, at the edge of the slats therebetween, said cords running down to the usual weight bar which is raised when said cords are pulled;

To provide in connection `with such a supporting bar and the arrangement of the lifting cords,fladder elements between the pairs of supporting straps, staggered at the opposite sides of alternate slats, whereby the lifting cords can be extended down along the inside of said supporting straps, between the staggered ladder elements connecting the pairs of straps;

To provide an improved means for detachably connecting the slats to the ladder elements, whereby said slats can be easily removed for cleaning without interference with supporting strapaladder elements, or lifting cords.

To provide as one means for detachably connecting a slat to a ladder element, an element having a wing, the free end of which extends along the under side of a slat, lengthwise thereof, with its attached part removably held through an opening in said slat, whereby said element can be detached from the slat, or the ladder element can be removed from the free end of said element or the wing part thereof.

Other advantages and objects of the invention will appear from the following more detailed description of one practical embodiment thereof, taken with the accompanying sheet of drawings, on which the invention is illustrated, and in Which Figure 1 is a front view of a Venetian blind Il o' 2 embodying our,- invention, with partsof thel'supporting Ystraps broken i away tof-show the uinside arrangement;

,ligure 2.isa plan view-looking `down on-the supporting ibar, with avpartxof a coverfslat removed to show the cord-receivingy channelf in the `top of said supporting bar;

liigure 3 is an enlargedtop plan view of -the `supporting bar, with themiddle portion broken out tofr'educe the size ofthe viewyandparts ofithe supporting straps broken away to showlthe arrangement of the cords and the guiding pulleys;

iFigure 4 is a plan view of one of the slats, taken on line i-4, of Fig. 1, with `the middlelportion broken out, and showing one of the attaching elements for 'attaching the Hslat to Lthe Ylladder element;

Figure 5- isa sectional view, `taken on the line 5-5 of Fig. 4, Vshowing an attaching element,

\ having two `wing portionswith its middle'portion inserted through the slat, and showing one'o'f the ladder elements between the i slat and said= wing portion;

Figure 6 is an enlarged vertical sectional View through the supporting bar, taken on line G-I-E,

of Fig. l, showing the attached supporting straps, and a cover slat over the top, under the straps.

Figure '7 is a fragmentary edge view of one end of the supporting bar, showing the cords and the rollers on `which said cords move.

Referring now in detail to the drawings, a supporting bar is designated In, with the usual pivot supports at its opposite ends, designated I I and I2, said bar having a cord-receiving channel I3 in its top, extending lengthwise thereof, with cord-guiding pulleys or rollers, as at I4, at one end of said supporting bar, and as at I5, at the other end of said bar and on the opposite side thereof, as seen in Fig. 3, whereby the two cords, I5 and I'I, are extended up through said supporting bar, as at I8, with the usual cord grip mechanism I9, over a guide pulley 20. One of said cords I6 extends to the first pair of guide rollers, 2l and thence down to the weight bar, designated 22, along the inside of the first supporting strap 23, which extends over the top of the supporting bar, and down to the weight bar 22, as seen in Figs. 1, 2 and 3. The other cord I1 extends in said channel I3, to the opposite end of said bar, and to the opposite side thereof, and out around a pulley 24, and down over a roller 25, and downwardly along the inner side of a supporting strap 26, to the weight bar 22. By this arrangement said cords are separated and are turned downwardly from opposite ends and opposite sides of said supporting` bar, `as clearly shown in Fig. 3, and do not interferehwith each other. The supporting

straps

23 and 26, at opposite ends of the supporting bar, vand the weight bar, are in pairs in the usual manner, with ladder elements, a-s 21, connecting the straps of each pair, and being staggered, as will be clear from Fig. 1, lwhere a part of one strap 23 is broken away.

The lifting cords I6 and l1, extending from the supporting bar I0 down to the weight bar 22, extend along the inner sides of two of the supporting straps, but at opposite sides, and at opposite edges of the slats, designated 28, and do not pass through the slats, as is the usual arrangement. This makes it possible to remove the slats from between the two pairs of supporting straps, resting upon the connecting ladder elements, designated 21, as shown.

We will now describe our means for connecting the slats With the connecting ladder elements 21, whereby said slats can be readily detached and removed.

We accomplish this by providing the slat with an element having a wing portion extending along the under side of the slat, lengthwise thereof, with a free end, whereby the ladder element can be inserted between the slat and the wing portion. This attaching element can be -Inade with one or two wing portions and can be variously attached to the slat.

In Fig. 5, we have shown an attaching element having its middle portion, designated 29, formed into an arch or knob adapted to be sprung through the opening 30 through the slat, said attaching element having two wing portions, as 3l, 32, extended lengthwise of the slat to which it is attached, with the outer ends bent toward the slat, thus forming a slideway at each end, transversely of the slat 28, to receive the ladder elements 21, one of which is shown in place transversely through said slideway, over the lwing portion 32.

By removing the attaching element from the slat, the slats are left free and smooth for easy cleaning. l'f desiredl the slats can be removed by removing the ladder elements from between the slat and the wing portion, thus removing the slat with the attaching element still connected therewith.

Thus we have provided a combination supporting and tilting bar, with the lifting cords carried in its channel andv removable therewith as a unitary structure, without the necessity of detaching said cords from xed or permanent structure, and have run the cords at opposite sides of ie bar, at its opposite ends, so as to have the minimum oi interference of cord with cord and whereby to position the cords at the opposite edges of said tilting bar, under supporting straps at opposite ends and on opposite sides of said leaving clearance between the pairs of straps and the cords running along the inner sidesJ of (lll said straps, for the slats to be removably inserted thereon, upon the ladder elements connecting the pairs of straps.

Another important feature of our invention, as seen in Figs. 2 and 6, is to so attach the supporting straps to the tilting rail l0, that a covering slat, as 33, can be slipped under the strap over the top of said tilting rail I0, whereby to cover the channel, cords and rollers, as will be understood from Fig. 6. The supporting straps are carried over the top of the tilting rail and stapled to the edges of said rail, at opposite sides, as indicated in Fig. 3, at 23 and 26. This covers the cords and mechanism and also leaves a nish on top which keeps out the dust and dirt.

We do not limit our invention to the details of construction and arrangement here shown for illustrative purposes, except as we may be limited by the hereto appended claims.

We claim:

l. 1n combination with the supporting straps and their ladder elements for supporting the slats of Venetian blinds, of slats having holes therethrough, there being one hole between the supporting straps at the opposite edges of said Slat, and a spring metal clip having a portion bent into an arch-like knob to be sprung through said hole, and having its free end underlying said slat to receive said ladder element between the Slat and said free end, whereby said slat is detachable from said supporting straps and said ladder elements.

2. In combination with the supporting straps and their ladder elements for supporting the slats of Venetian blinds, of slats to be inserted :between said supporting straps and resting upon said ladder elements, each slat having a hole therethrough positioned between said supporting straps and between said ladder elements, and detachable clips having their middle portions formed into an arch-like knob to be pressed yieldingly through the hole in said slat, with its free ends extended under said slat to receive said ladder elements between said free ends and the under side of said slat, whereby said slats can be removed from said supporting straps and ladder elements by pulling said clips from said holes.

` JOI-1N B. GRIFFITH. BYRON C. DUTTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 138,761 Potter, Jr May 13, 1873 2,103,394 Wade Dec. 28, 1937 2,137,444 Clancy Nov. 22, 1938 2,200,349 Walker May 14, 1940 v2,307,278 Krantz Jan. 5, 1943 2,311,716 walker Feb. 23, 1943 2,317,660 Williams Apr. 27, 1943