as shown in fig1 the present invention is directed towards a vertical blind assembly generaly indicated as 10 and includes a head casing 12 having an elongated configuration and extending along the length in substantially overhanging relation to a pre - selected area , passageway , doorway , window , etc . the vertical blind assembly 10 therefore serves to selectively obstruct or permit vision or light to pass through the doorway , window , etc . depending upon the angular orientation or attitude of the individual vertically depending blinds 14 . as is known in the art , a first positioning means which may be partially defined by a continuous pull - cord assembly 16 is structured for interconnection to each of the blinds 14 to cause their traversal of the length of the head casing 12 when properly manipulated . similarly , a second positioning means at least partially defined by a beaded pull - chain 18 is interconnected to the individual blinds 14 so as to cause their rotation or pivotal movement about their own longitudinal axis . accordingly , when so manipulated , the beaded pull - chain 18 serves to control the angular orientation of the blinds 14 collectively in order to permit or obstruct light passage or viewing therethrough . with respect to fig2 and 4 , the vertical blind assembly 10 of the present invention may be structured such that the plurality of blinds 14 may be collected at one or the other end ( fig2 and 3 ). in such position the blinds are arranged in immediately adjacent and substantially compacted or retracted position defining an open position of the blind assembly . passage through a given doorway , passageway , etc . over which the head casing 12 is suspended is thereby possible . alternately , the structure of the present invention incorporates an arrangement ( fig4 ) wherein the plurality of vertical blinds may be simultaneously collected at opposite ends of the head casing 12 &# 39 ; in accordance with the directional arrows so as to open or free the passageway over which the head casing 12 &# 39 ; extends . the broken lines in fig2 and 4 represent the individual blinds 14 collectively positioned in a &# 34 ; closed &# 34 ; position of the blind assembly 10 such that the doorway , window , etc . is covered to prevent clear passage therethrough . in order to facilitate operation of the subject blind assembly 10 , the lower ends thereof may be interconnected by appropriately structured cordage 15 which may take a variety of structural configurations and designs . with primary reference to fig5 and 8 through 11 , each of the blinds 14 is removably supported in depending relation by a holder 20 having a bifurcated distal end portion 22 designed to removably support the upper end 17 of each blind 14 . an angularly oriented and outwardly extending hook member 23 is fixedly attached between the bifurcated portions of the distal end 22 of the holder 20 so as to engage and extend between a mounting aperture 24 integrally formed in the upper end 17 of each blind 14 . slight spreading or separation of the bifurcated portions of end 22 facilitates easy mounting and removal of the end 17 from the holder 20 as should be apparent . the holder 20 is rotatably mounted to a carrier means generally indicated as 26 and more specifically to a carrier frame 28 . separate carrier frames 28 are associated in supporting relation to each of the individual holders 20 and blinds 14 . the carrier frame 28 includes a first open ended recess 30 and a second open ended recess 32 both of which are disposed in substantially transverse , adjacent and communicating relation to one another . the first recess 30 is specifically structured to have a first gear element 34 mounted therein . this gear element is preferably in the form of a worm gear and includes a centrally disposed channel 35 and integrally formed outwardly extending elongated key element 36 formed in channel 35 to extend along the length thereof . relative dimensions between the interior surface of the first recess and the exterior surface of the worm gear 34 is such as to allow free rotation of the worm gear 34 about its own longitudinal axis within the recess 30 . further , the positioning and dimension of the open end 37 is such as to allow removable insertion of the gear element 34 into the interior of the recess 30 in what may be considered a &# 34 ; snap - fit &# 34 ; attachment . similarly , the second recess 32 has an open ended construction as at 39 which allows a similar &# 34 ; snap - fit &# 34 ; removable connection or mounting of the holder 20 therein . this is possible due to the cooperative dimensioning of the annular exterior surface as at 38 of holder 20 . similarly , the holder 20 is allowed to rotate within the recess 32 due to the cooperative dimensioning , as set forth above , of the recess 32 and the annular exterior surface 38 of holder 20 . a second gear element 40 is removably secured in aligned , substantially coaxial relation to the holder 20 as best seen in fig5 and 11 . removable connection between second gear element 40 and holder 20 ( fig1 ) is accomplished through frictional engagement between the exterior surface of coaxial finger 42 and the interior surface of receiving channel 43 . such frictional engagement is sufficient to allow rotation of the gear element 40 with the holder 20 at least until a predetermined force or pressure differential is exerted on such frictional connection . more specifically , and with reference to fig5 the first and second gears 34 and 40 are disposed in mating engagement with one another . accordingly , rotation of the worm gear 34 in turn causes rotation of the second or spur gear 40 which in turn causes rotation of the holder 20 and selected angular orientation of the vertically depending blind 14 . however , when rotation of the holder is prevented either due to obstruction of the blind member 14 or interaction between stop portions of the carrier means 26 and continued rotation of the second gear element 40 occurs , relative rotation will occur between the second gear element 40 and the holder 20 . this will therefore allow the second gear element 40 to serve as a clutch since the pressure or force differential exerted between the gear element 40 and the holder 20 is sufficient to allow relative rotational movement between the exterior surface of the connecting finger 42 and the receiving channel 43 ( see fig1 ). the opposite end of gear element 40 includes an additional receiving channel 45 structured for receipt of a knob 46 therein . this knob 46 is integrally or otherwise attached in depending relation to the interior surface of the upper peripheral portion of the frame 28 . again with reference to fig1 , it is readily seen that the holder as well as the removably secured second gear element 40 can be easily removed from its upright movably supported connection within the second recess 32 as best seen in broken lines in fig1 . further with regard to fig5 and 8 , the carrier means 26 has runners or followers 48 secured to stub axles 49 projecting outwardly from opposite longitudinal ends thereof . the followers 48 are specifically dimensioned and disposed to fit within a track structure 50 integrally or otherwise fixedly secured to the interior of the head casing 12 to support the individual carrier frames 28 as they travel in opposite directions along the length of the head casing 12 . interconnection between the stub axles 49 and the followers 48 is accomplished by such members 49 passing through integrally formed and centrally located apertures 51 . the fit therebetween may allow rotational movement of the followers 48 about the members 49 such that the followers 48 rotate as they travel along the length of the head casing 12 and track 50 . alternately , a frictional engagement may occur such that the followers 48 merely slide within and along the length of the track structure 50 . other structural features of each carrier frame 28 includes a facing plate 52 integrally formed on the frame 28 and oriented in substantially transverse relation to the direction of travel of the frame 28 along the length of the head casing 12 and track structure 50 . the facing plate 52 includes an apertured construction including elongated aperture 54 and a first and second connecting aperture 56 and 58 respectively . each facing plate 52 is specifically disposed and configured to cooperate with the first positioning means defining at least in part the pull cord 16 . more specifically , the elongated aperture 54 is specifically dimensioned to allow passage therethrough of cord sections 16 &# 39 ; ( see fig7 ) upon a pulling or otherwise activation of the pull cord 16 extending exteriorly of and in depending relation to the head casing 12 as described with reference to fig1 . with reference to fig7 the endmost carrier frame 28 &# 39 ; has the opposite ends of cord section 16 &# 39 ; fixedly secured to the first and second connecting apertures 56 and 58 in an opposite orientation . one cord section 16 &# 39 ; loops about a pulley assembly generally indicated as 53 and passes through the first connecting aperture 56 and is knotted . the opposite end of the cord section 16 &# 39 ; passes directly through the second connecting aperture 58 and is knotted without passing about or in connection with the pulley assembly 53 and is thereby reversely oriented . the endmost carrier frame 28 &# 39 ; is thereby selectively positioned either towards or away from the end 80 of the head casing 12 which is directly associated with and serves to support the pulley assembly 53 . with reference to fig5 , 6 and 7 , each of the connecting frames 28 are successively positioned in spaced apart relation to one another and further are directly interconnected through the provision of a connecting means generally indicated as 57 . this connecting means includes a plurality of connecting links each pivotally attached to one another . in addition , the individual links comprise a first link 59 and a second link 60 associated with each carrier frame 28 . such first and second connecting links are disposed in overlapping relation to one another ( see fig5 and 8 ) and both are pivotally attached to an upstanding pin 62 substantially at the midpoint of the links 59 and 60 so as to rest on an annular platform 63 . an enlarged head or flange 64 prevents inadvertent detachment of the individual links 59 and 60 from the pin 62 . each of the connecting links 59 and 60 are somewhat similarly attached to the second and first connecting links respectively associated with the next adjacent carrier frames 28 . each respective first and second connecting links 59 and 60 are pivotally secured to the next adjacent links by pivot pins 66 extending through aligned apertures 67 and 68 formed in opposite ends of each link as clearly shown in fig8 . enlarged and specifically configured ends 69 and 69 &# 39 ; prevent inadvertent detachment of the pivot pins 66 from their connecting association with correspondingly positioned ends of the respective links 59 and 60 . as also seen in fig8 the upwardly extending pin 62 passes through substantially centrally located and aligned apertures 65 formed in the approximate midportion of each of the connecting links 59 and 60 . as clearly shown in fig6 and 7 , the connecting means 57 thereby defines somewhat of an accordionlike structure capable of being extended ( fig7 ) or substantially retracted ( fig6 ) such that forced travel or movement of the endmost carrier frame 28 &# 39 ; due to manipulation of the pull cord 16 , of the first positioning means , will in turn cause the successive frames 28 to move towards or away from the endmost carrier frame 28 &# 39 ; and therefore be contracted or extended relative to the length of the head casing 12 as explained with reference to fig2 through 4 . again with reference to fig6 and 7 , a double pulley assembly 53 &# 39 ; is provided to carry both of the cord sections 16 &# 39 ; as they extend from their depending exteriorly accessible position ( see fig1 ) along the entire length of the head casing 12 to the endmost carrier frame 28 &# 39 ;. as set forth above , only a single pulley assembly 54 need be mounted at the opposite end 80 of the head casing 12 for support of a single chord section 16 &# 39 ; due to the reverse orientation of the opposite ends of the cord sections 16 &# 39 ; as they engage the endmost carrier frame 28 &# 39 ;. the second positioning means of the present invention comprises in part , as set forth above , the beaded pull chain 18 ( see fig1 ). this pull chain 18 is mounted so as to travel in opposite directions about a wheel or pulley ( see fig1 through 17 ) wherein the periphery of the wheel 70 is defined by a plurality of pockets or compartments specifically dimensioned and disposed to receive the individual bead elements 18 &# 39 ; as the pull chain 18 is moved relative to the wheel 70 . the wheel 70 is fixedly attached to one end of an elongated positioning rod 72 as at 74 and substantially within a recessed housing 70 &# 39 ; ( fig1 ). accordingly , rotation of the wheel 70 , through pulling manipulation of the sprocket chain 18 , causes its rotation as well as the rotation of the positioning rod 72 about its own longitudinal axis . with reference to fig5 and 9 , the positioning rod extends substantially the entire length of the head casing 12 and passes concentrically through each of the centrally located channels 35 of the gear elements 34 associated with the plurality of carrier frames 28 . an elongated channel or slot 36 &# 39 ; extends along the length of the positioning rod 72 and serves to matingly engage the outwardly extending key 36 ( fig5 and 9 ). therefore , rotation of the positioning rod 72 upon manipulation of the beaded pull chain 18 causes rotation of each of the gear elements 34 associated with each of the carrier frames 28 . as explained in detail above , such rotation of gear element 34 in turn causes rotation of the second spur gear element 40 and selective angular orientation of the vertically depending blinds 14 through their supported interconnection with the holder 20 . with reference to fig1 and 17 fixed attachment of the wheel 70 to the end 74 of the positioning rod 72 accomplishes a one - to - one ratio of rotation and eliminates the necessity of any type of universal gearing assembly which causes a variance in the relative rotational speeds . with regard to fig1 and 18 , the opposite end of the head casing 12 as at 80 shows the positioning rod 72 merely supported in rotational relation to the recess socket 83 due to a mounting flange 85 . additionally , spacer elements or sleeves 87 may extend between the interior surface of the end 80 of the head casing 12 as at 82 so as to maintain the endmost carrier frame 28 &# 39 ; a given spaced distance from the distal end 80 . a similar spacing sleeve 87 may be provided at the opposite end of the head casing 12 associated with the sprocket 70 and pull cord 16 and beaded pull chain 18 . with reference to fig5 and 13 , the present blind assembly includes a stop means generally indicated at 90 comprising a first stop portion 92 fixedly secured to rotate with the holder element 20 and a second stop portion generally indicated as 96 disposed adjacent entrance 37 of first recess 30 ( fig8 ) and fixedly secured relatively to a secondary depending flange 93 of the carrier frame 28 . the first stop portion includes an outwardly extending flange 95 connected to one end of an eccentrically dimensioned and curvilinearly configured peripheral edge 97 and a first flat 98 integrally formed on the holder 20 at the opposite end of curvillinear edge 97 as shown in cross - section in fig1 . the second stop portion 96 includes a step 99 disposed in interruptive relation to the outstanding flange 95 as indicated by the directional arrow 100 and along its rotational path of travel . the second stop portion 96 also includes a second flat 102 is located in interruptive relation and as shown in fig1 in direct mating engagement with the first flat 98 so as to prevent rotation of the holder 20 in the opposite direction . for purposes of clarity , the first and second flat 98 and 102 respectively are shown in mating and stopping engagement with one another when the holder is in the position shown in fig5 .