US2481714A - Venetian blind - Google Patents

Description

Sept. 13, 1949. y J. BEZJIAN ZAM/7M VENETIAN BLIND Filed March 9, 1945 2 Sheets-Sheet l I nventor Attaeys J. BEZJIAN VENETIAN BLIND Sept. 13, 1949.

Filed March 9, 1945 2 Sheets-Sheet 2 Patented Sept. 13, 1949 OFFICE VENETIAN BLIND Jack Bezji'an, Chicago, Ill. Application March 9, 1945, Serial No. 581,783 l1 claim. (c1. 16o- 173) 'This invention vrelates Vto improvements in Venetian `blinds and has for its primary object to facilitate the cleaning of the slats of which the blind is composed.

Another object-is to enable a slat which may have -becorne broken or otherwise disgured to be readily replaced by a new slat without requiring that the blind in its entirety be dismantled.

The above and other objects may be attained by employing this invention which embodies among its features a Venetian blind composed of the customary ladder straps and cross straps upon which are supported in spaced parallel relation slats forming the blind when the device is assembled. Other features embody positioning the blind adjusting cords directly behind and beneath the ladder straps so as to conceal them from vision and at the same time so arrange these cords that the slats may be readily removed one at a time or collectively by simply turning them on edge and disengaging them' from the adjusting cords after which they may be slid out of position on the cross straps either endwise of the blind or by moving them far enough to disengage one of the ladder straps and then moving in the opposite direction swinging the freed end forward and withdrawing the slats.

Other features embody concealing the blind raising or lowering cords behind the ladder straps.

In carrying my invention into practice I employ the structure disclosed in the accompanying drawings in which:

Figure 1 is a top plan view of a Venetian blind embodying this invention.

Figure 2 is a side view of the top supporting bar of my improved Venetian blind.

Figure 3 is a top plan view of a slat constituting one of the elements of my improved Venetian blind.

Figure 4 is a top plan View of the bottom bar of the blind.

Figure 5 is an edge view thereof partly in section to more clearly illustrate the details of construction.

Figure 6 is a vertical sectional View through a Venetian blind embodying this invention.

Figure 7 is a horizontal sectional view taken on the line 'I-'I of Figure 6, and

Figure 8 is side view partially in section of Figure 6.

Referring to the drawings in detail my Venetian blind designated generally I5 comprises a top bar |6 having near opposite ends transversely extending slot I1 for a purpose to be more fully hereinafter described. A notch I8 is formed in one end of the bar 'I6 and mounted therein on trunnions I9 is a pulley 20 the purpose of which will subsequently appear. Secured to opposite side of the top bar I5 and depending in spaced parallel relation from the upper edge thereof are ladder straps 2| carrying cross straps 22 upon which the blind 'slats are adapted to rest as illustrated in Figures 6 and 8. It will be understood, of course, thatfthestraps 2l and 22 are formed of a nexible material preferably a woven fabric ofthe ltype commonly employed in the suspension of Venetian blinds.

Mounted for independent rotation on pintles "23 which extend longitudinally -of the slot l1 vin the top bar I6 are rollers or g'rooved pulleys 24 over which the blind lifting and lowering cords 25 and 25 are trained. Secured to the lower ends of the ladder straps 2| is a bottom bar 2'I which is provided near opposite ends with transversely extending slots 28 and mounted in each of these slots 28 for rotation about an axis extending longitudinally of the bar '2'I is a pulley 29 the groove of which is adapted to align with the grooves in the pulleys 24 from which the ropes or cords 25 and 26 depend. As shown in Figure 6 the bight portion of each of the cords 25 and 26 forms a loop about the pulley 29 and likewise at the opposite end of the blind the cord 25 is looped about the pulley adjacent the opposite end of the blind. It will thus be seen that as pull is exerted on the ends of the cords 25 and 26 running over the roller 20 the bottom bar will be lifted so as to raise the blind clear of the sash of the window to which it is attached.

Mounted on each cross strap 22 but detachable lwith relation thereto is a slat 3B each of which is provided near opposite ends with transverse notches or grooves 3| to accommodate the cords 25 and 26. As will be seen upon reference to Figures 1, 4, 5 and 7, the vertical runs of the cords 25 and 26 are concealed behind the ladder straps 2| which not only lends attractiveness to the appearance of the entire unit but also serves to aid in retaining the vcords 25 and 2B in the notches 3| of the slats 30.

Inasmuch as the slats 30 lie loosely upon the cross straps 22 it will be readily seen that when it is desired to remove a slat for replacement or cleaning it is only necessary to lift one edge so as to free the cords 25 and 26 from one pair of notches 3| whereupon the opposite pair of notches may be extracted from their position surrounding the opposite runs of the cords and the slat may be withdrawn bodily endwise from the blind structure. A new slat or a newly cleaned slat may be readily reinserted in place by tipping it edgewise and inserting it into the end of the blind in the proper place and allowing it to rest in a horizontal position on the respective cross straps.

The blind is provided with the conventional tilting arrangement by which the slats may be tilted so as to partially overlie one another along longitudinal edges and thus completely close the blind or they may be tilted at any intermediate position between that and horizontal or above horizontal so as to produce any desired light distribution within the room in which they are used. Any conventional type of tilting mechanism may be employed in connection with my improved Venetian blind and slat supporting and retaining device. Inasmuch as the cords 25 and 26 run over the grooved pulleys 29 mounted in slot 28 in the bottom bar 21, it is desirable that these pulleys be made of somewhat greater diameter than normal in order that the vertical runs of the cords 25 and 26 will be substantially parallel throughout their entire length. While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

What is claimed is:

A Venetian blind including a top tilting bar having a transverse slot near each end, a transverse pintle mounted in each slot, a pair of spaced 4 pulleys mounted on each pintle adjacent the side edges of the top bar, a cord loop sustained by each pair of pulleys, a bottom tilting bar having a transverse slot near each end and in vertical alignment with the slots in the top tilting bar, a spreader pulley mounted to rotate in each slot in the bottom tilting bar on an axis which lies in a plane with the axis of the bottom tilting bar, the cord loops extending from the pulleys in the top bar being directed around'thespreader pulleys in the bottom tilting banladder straps connected to the top and bottom tilting bars in positions to overlie the cord runs extending there- Y between, cross straps vertically spaced from one another and connecting the ladderstraps intermediate the top, bottom tilting bars and blind slats resting on the cross straps and having notches in opposite side edges for accommodating the parallel cord runs, the top tilting bar having a notch in one end and a pulley mounted. Y

Number Date Country 5,030 Great Britain Apr. 23, 1885 19,191 Great Britain Sept. 22, 1905

Images