US723762A - Venetian blind. - Google Patents

Description

No. 723,762. PATENTBD 222.12.24, 1903. A. F. TMLBR.

VENETIAN BLIND.

APPLIOATION FILED MAB.. 17, 1902.

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PATENT OEEICE.

ALEXANDER FRIEDERICH TM LEE, on HAMBURG, GERMANY.`

VENETIAN BLIND.

SPECIFICATION forming part of Letters Patent No. 723,762, dated March 24, 1903. Application led March 17,1902- Serial No. 98,620. (No model I To all whom it may concern: l

Be it known that I, ALEXANDER FEIEDEE- TCH TMLER,a subject of the German Emperor, and a resident of Hamburg, in the German Empire, have invented certain new and nseful Improvements Relating to Venetian Blinds, of which the following is a specification.

This invention relates to Venetian blinds, and has for its object to provide an improved form of tape for supporting the laths in position.

As is well known,Venetian-blind tapes as heretofore constructedconsist of two vertical tapes having a number of small cross-pieces or cross-tapes joiningsaid vertical tapes together in the form of a ladder, such crosstapes being adapted to support the lathe of the blind, one of the vertical tapes forming the supporting orbearin g tape proper, and the other forming the adjusting-tape for adjusting by its being raised or lowered the position of the laths resting upon or between the cross-tapes. of hemp, flax, and the like.

Hitherto the cross-tapes have been secured to the two depending tapes in such a manner that the supporting-surface of the cross-tapes carrying the laths extends right across from one to the other of the depending tapes, or the laths may repose loose upon or between the cross-tapes and vslide when set on edge against the vertical 'adjusting-tape. arrangements have the disadvantage that the lower part of such blind cannot be properly closed, as the bearing-tape is stretched by the weight of the laths, while the adjustingtape remains more or less unstretched or may even become shortened when exposed to rain, dto., owing to its being the outermost tape. In consequence of this stretching of one tape and shortening of the other the two points of attachment for the cross-tape on the said depending tapes become displaced relatively to each other and the attachment-points of the bearing-tape move gradually down,so that the distances between the said attachment-points slightly increase from the top to the bottom orfoot of the blind, while the distances between the attachment-points ofthe adjusting-tape remain practically unaltered or even in some cases by the influbecome shortened The tapes are preferably inade TheseV ence of rain, moist, dto. In this manner the cross-tapes and the laths carried by themare caused to. leave toward the foot or bottom of the blind their upright position and to assume a gradually-inclined position, in which. the laths no longer close.

The object of this invention is to obviate these defects by providing or intercalating between the adjusting-tape and the adjoining ends of the cross-tapes, made, preferably, in the form of loops adapted to prevent the laths from sliding, a flexible intermediate connecting-piece.

In order that my invention may be more fully understood, I shall now proceed to describe the same in detail with reference to the accompanying drawings, in which- Figure l is a vertical cross-section of aVenetian blind madein accordance with and embodying my invention. Fig. 2 is a front view of a part of the improved Venetian blind. The adjusting-tape, is partly broken away to show the arrangement of the crosstapes. Fig. 3 is an enlarged detailed edge view of a loop-shaped cross-tape.

Similar letters refer tosimilar parts throughout the several views.

The inner edge of the top plate a of the blind is connected with, the'inner edge of the blind bottom plate b by the bearing` tape or tapes c. To the front edge of the bottom plate l) is attached the adjusting-tape d, preferably two or more of such adjusting-tapes being provided. To the upper end of the tape d a cord d is attached, passing over a grooved guide-roller cl2, mounted in a slot of the top plate. 1

The tapes c and d are connected by a series of loop-shaped cross-tapes e f, arranged a proper distance apart. Between the adjusting-tape d and the adjoining ends of the loopshaped cross-tapes are provided or intercalated flexible intermediate connecting-pieces c'. In Fig. 3 I have shown a preferred form -of such cross-tape. According to this example the loop is formed by two cross-tapes e and f, placed upon'each other and connected at the proper places in any suitable manner, the lower cross or connecting tape ebeing somewhat greater in length, and it is the prolongation e that forms the flexible intermediate connecting-piece.

vided also at the other end of the cross-tapesn that is to say, between the latter and the bearingtape-although in all ordinary cases the last-mentioned intermediate pieces are not necessary.

Having fully described myinvention, what I claim, and desire to secure by Letters Patent, is

l. A Venetian blind comprising bearing- Jrapes, adjustingtapes, slats between the bearing and adjusting tapes, and loops, one end of each of which is directly secured to a The blind-laths or blind-slatsg are located or placed in the loops formed by the crosstapes ef, as this is evident from the drawings. A raising-cord 71l may in well-known manner be fixed to the bottom plate Zi and passed through holes or slots in the laths or slats g and then lead over a guide-roller 7L', mounted in a slot of the top plate a. Two or more of these well-known blind-raising devices may be provided.

I prefer to arrange the cross-tapes efcalternately at both sides of the raising-cord 7L,

so that 1n each double tape tuo rows of crosstape, and a flexible connection between the tapes are folmed, between which the raisingother end of each loop and a tape, said slats cold passesalong, as this is obvious from Fig. supported in the loops, for the purpose set forth. l

2. In a Venetian blind, the combination with the supporting-blade, a bottom plate b, bearing-tapes fixed to the supporting-plate and to one edge of the bottom plate, rollers journaled in the supporting-plate, adjustingtapes secured to the opposite edge of said bottom plate and mounted on said rollers, lifting-cords secured to the bottom plate, Slat-loops f each connected at one end directly to a bearing-tape, and a flexible connection c connecting the other end of each loop to an adjusting-tape and slats mounted in said loops, for the purpose set forth.

ALEXANDER FRIEDERICH TMLER. Witnesses:

MAX LEMCKE, OTTO W. I-IELLMRICH.

2 without further explanation.

For facilitating the introduction or inserting ot' the blind-slats into the loops ot' the cross-tapes it is advisable to make the crosstapes propel' forming such loop of different breadths. In the example shown (see Fig. 2) the cross-tape e e is ot somewhat-greater breadth than the cross-tapef, so that the loop formed by such tapes can be more easily opened than a loop formed by tapes having an equal breadth.

In the above-described improved blind the alteration in the lengths of the tapes (bearing-tape and adjusting-tape) cannot aiect the closing position of the slats, as the said intermediate pieces e compensate for suoli alteration. In some cases such flexible intermediate connecting-pieces may be pro-

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