Venetian blind

Claim 1

Venetian blind comprising a case having a support channel 8 mounted in the upper portion of a window or the like; an upper 3 and a lower bar 2; a plurality of elongated slats 4 having transverse end slots 22 and located horizontally between said bars 3,2; support tapes 5 including vertical portions with slat support portions and extending between said bars 3,2 for carrying said slats 4 and mounted with their vertical portions on each side of the slats and bars, and secured to the top bar 3; lifting 11 and control 12 cord pull units including cords operatively connected with the respective ends of the respective bars 2,3 for effecting selective raising, lowering and angular slat control of the slats; said blind being adapted optionally to be lifted completely up to the upper portion of the window and to be lowered completely down to the lowest portion of the window, the upper 3 of said bars having an end fitting 13 or 34 at each of its ends, said end fitting 13 including means 14 for attaching it directly to the end of the associated bar 3; said end fitting 13 having a short shaft 19 projecting axially with and away from said bar 3 and having an eccentrically offset apertured 21 portion 20, and a cord pulleylike member 16 mounted coaxially with said top bar 3 on said shaft 19, said pulleylike member 16 having an annular peripheral groove 17 and a diametrical center channel or passageway 18 smoothly connecting opposite sides of the peripheral groove 17, said pulleylike member being spaced from said means for attaching the fitting 13 to said bar 3 to form a first space and the annular groove 17 in said member 16 constituting a second space; each of said cord pull units comprising two cords which extend coextensively from the case or support channel 8; one of said pull units including two lifting cords 11 each having one end fastened in said first space to the eccentric portion 2 relative to the shaft or axial projection 19 of the fitting on said upper bar 3, said cords 11 each then extending upwardly through cord-bearing means or aperture 10 in the support channel 8, and then traversing therein and extending coextensively through aperture-bearing means to the room or operator side of the blind and having means 23 to be operated together as a single pull unit; the other pull unit including two control cords 12, each of said control cords 12 having ends attached at spaced portions on the lower bar 2 and respectively running upward through said transverse slots 22 in the outer ends of the slats 4, then threading up around one side of the pulleylike member 16 and diametrically down through the center channel 18, when the blind slats are in the open substantially level position, and said cords 12 continuing to be wound in an Sshape manner back up and around the other side of the pulleylike member 16 and passing upward through the other cord-bearing means or apertures 10 in said support channel 8, and similarly traversing therein and extending coextensively similar to the first cords 11 to the room side of said blind and also having means 23 to be operated as a single pull unit; whereby said first-described pull unit with lifting cords 11 can be used for supporting the upper bar 3 in any horizontal position between fully raised and fully lowered positions and for effecting the inclining of the slats in one direction to a fully closed condition due to the eccentric connection of the cords 11 to the end fittings 14 of the upper bar 3, the control cords 12 supporting the lower bar 2 to pull up and again lower the said lower bar 2 and the slats therewith and to also selectively incline the slats as a group in positions between the aforesaid fully closed position and other intermediate and varying degrees of slats open positions to a reversely fully closed position; and means 26 27 in association with said window and blind to Releaseably and selectively retain or lock said pull unit cords to position the slats in any desired portion.