US3439726A - Cord pull for louvered or slatted shutters or blinds - Google Patents

Cord pull for louvered or slatted shutters or blinds Download PDF

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Publication number
US3439726A
US3439726A US601472A US3439726DA US3439726A US 3439726 A US3439726 A US 3439726A US 601472 A US601472 A US 601472A US 3439726D A US3439726D A US 3439726DA US 3439726 A US3439726 A US 3439726A
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United States
Prior art keywords
cord
slats
louvres
blind
pull
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US601472A
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English (en)
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Per Stephen Lageson
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Individual
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Individual
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Publication of US3439726A publication Critical patent/US3439726A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/308—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape with coaxial tilting bar and raising shaft

Definitions

  • a shaft is connected to a pair of discs rotatable by a pull cord, which pull cord passes through complementary projections for-med on the facing surfaces of the discs.
  • the lowermost slat, of a blind has secured thereto the end of a flexible band, which band passes through openings formed in the overlying slats and has its other end wound about a bushing secured to the said shaft.
  • a pivotallymounted locking element actuated upon lateral movement of the pull cord, is movable into engagement with teeth formed on one of the discs, thereby to retain the blind in a desired raised or lowered position.
  • a cord connected to the front and rear edges of the slats, passes over a V-pulley carried by the shaft and effects a tilting of the slats upon rotation of the discs in one or the other direction by the pull cord.
  • the invention relates to a cord pull for louvered or slatted shutters or blinds which are adapted to be lowered in an opening in a top rail, and the alignment of which can be adjusted, comprising a cord housing for guiding an endless p-ull cord in a rotatable clamping mechanism, connected firmly with a band roller on which a band is adapted to be wound on and off, in order to raise the louvres or slats or to lower them.
  • the present invention also comprises so-called fabric blinds, and curtain-like parts with strip-shaped sections, which are adapted to be adjusted at a more or less lowered angle against the horizontal position.
  • the shutter or blind is lifted and lowered by means of a cord or cord pull, wherein the term cord is intended to comprise parts such as twine, string, parallel cords, tapes, bands and the like.
  • band or belt comprises any element with long extended cross-section as well as cord-like elements.
  • cords are also known, for adjusting the position of the louvres to mount cords on both sides of these louvres or slats, which can be pulled up or down in opposite directions, in order to incline the louvres in one or the other sense.
  • cord includes bands, strips and the like.
  • the present invention has the object of providing a cord pull, whereby the operation is possible by using only a single cord, both for raising and lowering the blind, for adjusting and turning the louvres or slats and for fixing the blind at a certain height, that is to say, for lowering it, say, only halfways, whilst still making possible the adjustment or turning of the louvres or slats also in this position.
  • Such an arrangement will not only simplify substantially the operation of the blind, but also reduces the installations and fittings for operating elements to a minim-um so that undesirable or obstructing devices adjacent to the window are no longer required.
  • the parts used are as simple as possible.
  • this object is realized in that 3,439,726 Patented Apr. 22, 1969 there is arranged, coaxially to the band roller, a cord pulley in which a cord, mounted on both sides of the louvres or slats for adjusting their relative position, is guided in a releasable clamping device, and in that the rotatable clamping device is associated with an engageable and releasable locking element actuable in accordance with a movement or actuation of the endless cord.
  • the said locking element is actuated or released in that the freely suspended end of the endless cord is moved towards one side for locking, whilst the release is effected automatically by pulling briefly the section on the other side, relative to the locking movement.
  • the pull cord is associated with a revolving clamping wheel having one profiled disk with a toothing
  • the locking element consists of a pivoting ratchet located underneath the disk, having at least one ratchet tooth adapted to engage into the said toothing, which tooth is out of engagement in an intermediate position of the pivoting ratchet and engages into the toothing when pivoted to one side.
  • the said locking element is preferably Y-shaped; the two divergent legs of the Y form the ratchet teeth and the other arm forms an actuating lever, extending between the sections of the cord protruding from the cord housing.
  • the actuating lever projecting downwardly from the cord housing has at its free end such a width in the axial direction of the revolving clamping mechanism that it extends between the two cord sections coming from the cord housing. This arrangement has the object of making contact between the actuating lever and the cord sections below the cord housing even where the lower end of the endless cord does not extend exactly vertically.
  • the wide end of the actuating lever is extended forwardly of the cord housing, and a lower orifice of the cord housing, in which the locking element is located, is restricted in order to ensure that the cord sections are located near the locking element.
  • the belt roller and the cord guide pulley are arranged on a bushing, which is mounted in a head having at least two parallel webs or stays in its wall, wherein the wall stays have upwardly open slots whose lower ends have substantially the same radius of curvature as the bushing and into which the said bushing is fitted.
  • the wall webs are preferably located on a base plate, having a downwardly directed projection, such as known in the art, and adapted to engage into a hole in the top rail of the blind.
  • FIG. 1 shows a front elevation of the cord housing with locking element, partly broken away
  • FIG. 2 is a side elevation of the housing of FIG. 1 in cross-section along the line II II in FIG. 1, also partly broken away;
  • FIG. 3 is a diagrammatical view in perspective of the cord housing, shown partly broken away, and drawn in position adjacent to the top rail of a blind, with louvres arranged thereunder;
  • FIG. 4 is a view similar to that of FIG. 3, and shows a functional position for lowering the louvres or slats, individual parts of FIG. 3 having been Omitted for the sake of clarity;
  • FIG. 5 is a drawing similar to FIG. 4 and explains the raising of the louvres
  • FIG. 6 is a diagrammatical front elevation for pivoting the cord in order to engage the locking element, for moving the same into the position of FIG. 3.
  • FIGS. 1 and 2 show the cord housing 1.
  • This housing is equipped with a rotatable clamping mechanism 2, adapted to be rotated about a spindle, for example, in the form of a screw 3 mounted in the end walls 4, 5, of the housing.
  • a flexible shaft 7 is connected rigidly to the clamping device 2, such as by a connection 6, and terminates in a coupling member 8, forming the connecting link to a profiled shaft 9 in the top rail 10 of a blind, as described in detail hereinafter.
  • the clamping mechanism 2 consists of two discs 11, 12, arranged coaxially in spaced relationship from each other, and having on the mutually facing sides interengaging projections 13, 14. In the Winding path formed by these projections 13, 14, there rests a cord 15, having thus two sections 16 and 17, extending towards the bottom I through a hole 18 of the cord housing 1. As shown, the said disk 12 has a peripheral toothing 19.
  • the disk 12 is located in front of the rear end wall 5.
  • a locking element, shown generally at 20, is mounted in this end wall, and is freely pivotable about an axis, such as a screw 21 located between the end walls 4 and 5. As viewed from the front, the locking element is Y-shaped.
  • the two divergent legs 22, 23 form ratchet teeth whilst the symmetrical leg forms an actuating lever.
  • These ratchet teeth co-operate with the toothing 19, in that manner that, with the actuating lever 24 positioned vertically, they are out of engagement therewith, but engage thereinto with one arm, when pivoted as shown in FIG. 3, for example.
  • the actuating lever 24 has a certain width. Preferably, its lower end is extended towards the front of the cord housing, as at 25.
  • the extension, or the widened portion ensures that the sections 16, 17 of the endless cord make contact with the actuating lever, even if the lower end of the cord is pulled in the forward direction.
  • the rotatable clamping mechanism 2 is fixed in a certain position, since the direction of movement of the lower end 15 of the cord is so chosen that, for example, the torque at the shaft 9 and produced by the blind, causes the locking device to lock automatically.
  • the locking device 20 has been rotated to the illustrated position by movement of the cord section 17 to the left, in which position the ratchet tooth 22 engages the toothing 19.
  • the weight of the slats 26 exerts a torque on the shaft 9 which torque is transmitted to the disc 11 and tends to rotate the disc in a counter-clockwise direction. This torque acts against the tooth 22 thereby retaining the locking device in the illustrated position and preventing rotation of the disc.
  • FIG. 3 shows the starting position in which the louvres 26 or slats of the blind are in the topmost position, pulled up against the lower side 37 of the top rail 10.
  • the locking element 20 is so positioned that the ratchet tooth 22 engages into the toothing 19 of the disk 12.
  • a bushing 27 is fitted on to the shaft 9.
  • This bushing carries a band roller 28, which may be formed by the outer periphery of the bushing itself, as
  • a hand 30 is wound about the band guide roller 28 and passes through orifices 31 in the louvres 26, and is connected to the lowermost louvre or slat. The winding on and off of this band 30 causes the louvres or slats to be raised and lowered, respectively.
  • the cord guide pulley 29 has the form of a disk with a groove 32 with V-shaped cross-section.
  • a cord 33 is guided in this groove 32 and is connected with both sides of the louvres or slats, such as at 34, 35, 36, etc., wherein between the connecting points there is always a length of cord which determines the distance between this side of the louvres relative to their width, when the louvres or slats are positioned in the extended position.
  • a to-and-fro movement of the cord 33 relative to the shaft 9 causes the movement of the louvres or slats from a substantially vertical position through the horizontal position into the other substantially vertical position.
  • the louvres 26 or slats are positioned substantially horizontally, because they are pulled up against the lower side 37 of the top rail 10.
  • a head member is fitted into the top rail 10 and serves as a bearing means for the bushing 27.
  • This member may consist, for example, of wall portions 39, 40, 41 arranged on a base plate 38. These parts have a width such that they rest between vertical side walls 42, 43 of the top rail.
  • the base plate 38 has a downwardly directed projection 44 adapted to engage into an opening 45 in the lower wall 37 of the top rail in order to fix the head member in position.
  • the wall portions 39 through 41 have vertical slots 46, 47, 48, starting from the upper edge, which terminate at the bottom in a radius of curvature corresponding to the radius of curvature of the bushing 27, and into which the bushing is inserted as shown in the drawing and fixed without any further means.
  • the parts 28, 29 assure to some extent the axial alignment of the shaft 9.
  • the opening 18 is restricted by reinforced partition sections 49, 50 of the cord housing, so that the sections 16, 17 of the cord are near the locking element 20.
  • FIG. 3 shows the starting position of the blind, in which the louvres or slats 26 are in the topmost position, in which the firm pull of the band 30 assures the horizontal positioning of the louvres or slats 26 along the bottom wall 37.
  • the direction of the cord can now be reversed in any intermediate position so that the section 16 moves upwardly, as indicated by the arrow 54, whilst the section 17 moves downwardly, as shown by the arrow 55.
  • this lifting movement is small in view of the small diameter of said roller.
  • the cord 33 guided in the groove 32 of the cord pulley 29, is carried along in one direction, whereby the front edges of the louvres or slats 26 are lifted from the lower position of FIG. 4 into the upper position relative to the rear edges, such as shown in FIG. 5.
  • This movement may be arrested in any position, so that the louvres or slats 26 can be set at any position during the movement, as shown by the arrow 56.
  • the lower end of the cord is moved to the left, as shown by the arrow 57 in FIG. 6, so that the ratchet tooth 22 engages into the toothing 19 as shown in FIGURE 3. Since it follows from the preceding description that the weight of the louvres or slats tends to rotate the disk 12 with the toothing 19 in an anticlockwise direction (FIG. 3), this rotation causes the automatic locking of the ratchet tooth 22 in the toothing 19.
  • Release may be affected by pulling the cord as shown in FIG. 3, whereupon the blind may then be further lowered, by actuating the cord in the direction of the arrow 53, or raised, by actuating the cord along the arrows 54, 55.
  • a single ratchet tooth is sufiicient for the purposes of the invention.
  • the symmetrical construction shown in the drawings has also the further advantage that the same elements may be used for a left-hand or a right-hand fitting between cord housing 1 and top rail 10.
  • certain configurations of the toothing 19 and of the ratchet teeth 22, 23 may also cause locking in the other direction, in which case the movements of the cord must be effected in the opposite directions.
  • a cord pull arrangement for a blind formed of a plurality of slats comprising,
  • a rotatable clamping device carried by said housing, said device comprising a pair of axially-spaced discs having complementary projections formed on the facing surfaces thereof, one of said discs being provided with peripheral teeth,
  • a freely rotatable locking member carried by said housing, said member including an actuating lever extending between the said loop portion and a locking tooth normally spaced from the said peripheral teeth, said locking tooth being brought into engagement with one of the peripheral teeth upon pivotal movement of the locking member effected by a lateral movement of the pull cord against the said actuating lever.
  • PETER M CAUN, Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
US601472A 1965-12-16 1966-12-13 Cord pull for louvered or slatted shutters or blinds Expired - Lifetime US3439726A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE1632165 1965-12-16
DEL0054315 1966-08-16
DEG0054315 1966-08-16

Publications (1)

Publication Number Publication Date
US3439726A true US3439726A (en) 1969-04-22

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Application Number Title Priority Date Filing Date
US601472A Expired - Lifetime US3439726A (en) 1965-12-16 1966-12-13 Cord pull for louvered or slatted shutters or blinds

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US (1) US3439726A (de)
CH (1) CH455233A (de)
DE (1) DE1683177A1 (de)
GB (1) GB1158932A (de)
NL (1) NL6617633A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334572A (en) * 1980-01-24 1982-06-15 Griesser Ag Venetian blind construction
US5184660A (en) * 1991-11-01 1993-02-09 Verosol Usa Inc. Window blind activator
US6112800A (en) * 1998-09-08 2000-09-05 Comfortex Window Fashions Window treatment safety clutch
US8281843B2 (en) 2010-04-16 2012-10-09 Teh Yor Co., Ltd. Actuator mechanism for venetian blinds
US20140097284A1 (en) * 2012-10-04 2014-04-10 Carmelo Joseph Licciardi Di Stefano Spindle cover

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107191060B (zh) * 2017-07-18 2024-03-19 山东泰鹏智能家居有限公司 顶部旋转开合帐篷

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US131328A (en) * 1872-09-17 Improvement in curtain-fixtures
US183515A (en) * 1876-10-24 Improvement in curtain-fixtures
US241238A (en) * 1881-05-10 Brake-reel attachment for cars
US2401770A (en) * 1943-11-15 1946-06-11 Angelo F Naples Venetian blind
US2699229A (en) * 1953-04-07 1955-01-11 Union Asbestos & Rubber Co Safety device for hand brake mechanism
FR1245975A (fr) * 1959-01-24 1960-10-03 Butée automatique de sécurité pour le rouleau d'enroulement des stores à déroulement et analogues

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US131328A (en) * 1872-09-17 Improvement in curtain-fixtures
US183515A (en) * 1876-10-24 Improvement in curtain-fixtures
US241238A (en) * 1881-05-10 Brake-reel attachment for cars
US2401770A (en) * 1943-11-15 1946-06-11 Angelo F Naples Venetian blind
US2699229A (en) * 1953-04-07 1955-01-11 Union Asbestos & Rubber Co Safety device for hand brake mechanism
FR1245975A (fr) * 1959-01-24 1960-10-03 Butée automatique de sécurité pour le rouleau d'enroulement des stores à déroulement et analogues

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334572A (en) * 1980-01-24 1982-06-15 Griesser Ag Venetian blind construction
US5184660A (en) * 1991-11-01 1993-02-09 Verosol Usa Inc. Window blind activator
US6112800A (en) * 1998-09-08 2000-09-05 Comfortex Window Fashions Window treatment safety clutch
US8281843B2 (en) 2010-04-16 2012-10-09 Teh Yor Co., Ltd. Actuator mechanism for venetian blinds
US20140097284A1 (en) * 2012-10-04 2014-04-10 Carmelo Joseph Licciardi Di Stefano Spindle cover
US9878872B2 (en) * 2012-10-04 2018-01-30 Acmeda Pty Ltd Spindle cover

Also Published As

Publication number Publication date
CH455233A (de) 1968-06-28
DE1683177A1 (de) 1969-09-18
NL6617633A (de) 1967-06-19
GB1158932A (en) 1969-07-23

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