Abstract: Disclosed is a drive system for driving a screen, that includes an actuator designed to drive in rotation a winding shaft associated with the screen, and a compensation spring. The compensation spring includes a first series of tums having a first spacing; and at least one second series of turns having a second spacing, with a value that is greater than the value of the first spacing.

Abstract: An actuating system for a window shade includes an axle coupling part rotatable for raising or lowering a bottom part of a window shade, an arresting part and an arrester coupling part connected with each other, the arresting part having a braking state and a release state, a clutching part carried with the arrester coupling part and movable relative to the arrester coupling part between a retracted state where the clutching part is disengaged from the axle coupling part and an extended state where the clutching part is engaged with the axle coupling part, and an actuating wheel movably linked to the clutching part, the actuating wheel being rotatable in a first direction to urge the clutching part to move from the retracted state to the extended state, and in an opposite second direction to urge the clutching part to move from the extended state to the retracted state.

Abstract: An apparatus for covering an open top of a transportation trailer container, such as a chip train carrying wood chips, is provided. A flexible cover (e.g. tarp) may be deployed and retracted using a roller moved overtop of the container using pivotable arms. An electrically powered covering mechanism automatically deploys and retracts the cover. The covering mechanism is powered by a supercapacitor, which is charged when connected to an external power source. A charging control circuit can selectably allow or inhibit charging of the supercapacitor depending on power demands of other electrical loads.

Abstract: The present invention relates to a roller blind and a control device thereof. The control device comprises a reeling mechanism, a solenoid valve, a push mechanism, a front cap, and a damper. After the solenoid valve is energized, the solenoid valve drives the push mechanism to push against the front cap so as to separate the front cap from an engaging portion of the reeling mechanism, and the reeling mechanism is not subject to a resistance of the damper. A curtain fabric is not affected by the resistance of the damper and can be quickly lowered by gravity.

Abstract: A manually-operated window treatment system may include a roller tube, a covering material, and a semi-rigid chain assembly. The covering material may be attached to the roller tube and may be operable between a raised position and a lowered position via rotation of the roller tube. The semi-rigid chain assembly may be configured to be operated by a user to rotate the roller tube. The semi-rigid chain assembly may be configured to limit the size of a loop that can be formed by the semi-rigid chain assembly. The semi-rigid chain assembly may be operatively coupled to a drive pulley of the window treatment system. The semi-rigid chain assembly may include flexible outer housing and a stiffening rod. The flexible housing may surround and operate along the stiffening rod. The hollow chain may include multiple links that are connected together to form a continuous loop.

Abstract: A blind having a blind operating mechanism and a blind control element and having an enclosure for the blind control element, with the element completely enclosed, a connector supporting the enclosure on the blind, and depending downwardly, and an opening disposed by the enclosure to permit access to the blind control element, and a closure to permit access to the opening in one position and bar access to the opening in a second position.

Abstract: A manually-operated window treatment system may include a roller tube, a covering material, and a semi-rigid chain assembly. The covering material may be attached to the roller tube and may be operable between a raised position and a lowered position via rotation of the roller tube. The semi-rigid chain assembly may be configured to be operated by a user to rotate the roller tube. The semi-rigid chain assembly may be configured to limit the size of a loop that can be formed by the semi-rigid chain assembly. The semi-rigid chain assembly may be operatively coupled to a drive pulley of the window treatment system. The semi-rigid chain assembly may include flexible outer housing and a stiffening rod. The flexible housing may surround and operate along the stiffening rod. The hollow chain may include multiple links that are connected together to form a continuous loop.

Abstract: A coupling for a roller tube of a window treatment system may include a body and/or one or more compliant members. The body may include a bore through a rotational axis of the coupling. The body may be configured to be received within the roller tube of the window treatment system. The body may define an outer surface. One or more compliant members may extend at an oblique angle from the outer surface of the coupling. The one or more compliant members may be configured to engage a smooth inner surface of the roller tube. The use of compliant members may enable a rigid connection of the coupling to the smooth inner surface of the roller tube surface, without the use of fasteners.

Abstract: An actuating system for a window shade includes a fixed support shaft, a rotary drum pivotally connected with the support shaft, the rotary drum being rotatable for winding or unwinding a shading structure, and a limiting mechanism disposed inside the rotary drum and including a threaded portion provided on the support shaft, a stop portion, a limiting part, and a follower engaged with the threaded portion, the stop portion and the limiting part being respectively disposed adjacent to a first and a second end of the threaded portion, and the follower being rotationally coupled to and slidable relative to the rotary drum. The rotary drum is rotatable in a first direction to drive the follower to slide toward a first position for engagement with the limiting part, and in an opposite second direction to drive the follower to slide toward a second position for engagement with the stop portion.

Abstract: A window covering includes a first bracket spaced apart from a second bracket, a shaft positioned between the brackets, and window covering material connected to the shaft. The window covering can also include a window covering material position control mechanism to facilitate positional control for the window covering material. In some embodiments, a rail extends between the first and second brackets above the shaft. Each bracket can include at least one finger that is positionable within a locator hole in an end of the rail so that opposite ends of the rail are connectable to the brackets via the fingers and locator holes. The rail can have a length that is configured so that when the rail is coupled to the first and second brackets via the fingers and locator holes and the brackets can be accurately spaced apart from each other for installation of the window covering.

Abstract: A safety device for a curtain controller is provided. The safety device comprises a base, a bead chain wheel, and a cover. A shaft sleeve having a conical shape is disposed in a through hole of the base to connect a shaft's terminal and thus be fixed in a sleeving hole, having a shape to fit the shaft sleeve, of the bead chain wheel, so that the motions of the shaft sleeve and the bead chain wheel are linked. A bead chain is wound on the bead chain wheel. When the bead chain is pulled down, the shaft sleeve can drive the rotation of the bead chain wheel. The upper part of the cover is pivotally connected to the base, and the lower part of the cover buckles the base. Therefore, when the bead chain is instantly pulled down, the cover can be opened to drop the bead chain wheel.

Abstract: An opening and closing mechanism for a roll-up cargo door for a truck is intended to decrease injuries to the people who load and unload items from box trucks and semi-trailers. The mechanism allows the user to open and close the overhead roll-up door of these trucks while standing firmly and safely on the ground at the rear corner of the truck. The door opening and closing mechanism is in the form of a loop of material that is attached to a lower portion of the roll-up door and a guide disposed near the top of the door frame. The loop includes an indicator that shows the user which side of the loop is to be pulled down depending on the position of the door. The mechanism can be retrofit onto existing truck frames.

Abstract: A roller shade includes a frame unit (1), a micro-adjustment device (2) connected with the frame unit, and a shading unit (3) connected with the micro-adjustment device. The micro-adjustment device includes a drive shaft (21) mounted on the frame unit. The shading unit includes a first shade cloth (31) secured to a rear portion the drive shaft, a second shade cloth (32) secured to a front portion of the drive shaft, and a plurality of separation slats (33) mounted between the first shade cloth and the second shade cloth. When the shading unit is fully expanded, the inclined angle of each of the separation slats is adjusted by operation of the micro-adjustment device so as to regulate the lightness of the sunshine entering the house and to adjust the shading effect of the shading unit.

Abstract: An apparatus for raising and lowering a window shade having: a clutch assembly with a clutch core having a shaft; springs having pairs of load bearing members, the springs being circumferentially positioned along a length of the shaft, the pairs of load bearing members being circumferentially spaced around the shaft such that there are no two orthogonal planes along a longitudinal axis of the shaft about which a load applied to a load bearing member of each pair is symmetrically distributed; a pulley defining openings, each of the openings being configured to receive at least one pair of load bearing members; and a housing comprising a plurality of keys, each key being configured to fit between at least one pair of load bearing members received by the openings.

Abstract: In various implementations, a roller shade assembly may include an elongated body and a mechanism. The mechanism may include gears and a spring. The mechanism may allow the roller shade to be locked and/or unlocked using a driver. Internal component(s) of the roller shade may be adjusted using the driver.

Abstract: A window covering includes a head rail that supports a panel by lift cords such that one end of the panel may be raised and lowered relative to the head rail. An operating system controls movement of the panel and includes spools coupled to the lift cords such that rotation of the spools retracts and extends the lift cords. A shaft is connected to a spool of the lift spool assembly and to a brake and a spring motor. The spring motor applies a motor force to the shaft and the brake applies a brake force to the shaft such that the forces generated by the spring motor and brake hold the panel in the desired position.

Abstract: A chain control device for inhibiting movement of chains used in window blinds, shades and the like for moving the blinds between operative positions. The chain control device is secured at a location remote from the shades' clutch/drive housing. The chain control device is characterized by redirecting tension forces applied by the user of the blinds away from the shade drive.

Abstract: A slip cutch for a roller blind that includes a clutch base with a shaft portion, a drive sprocket including a drive tube and rotationally mounted on the clutch base, at least one clutch spring and a roller tube connector. The clutch spring maybe a coil spring frictionally engaged about the shaft portion and positioned between the shaft portion and the drive tube. The spring includes end members that engage the drive tube such that rotation of the drive tube about the shaft portion is resisted by the frictional engagement of the spring about the shaft. The roller tube connector is secured about the drive tube and rotates with the drive tube about the shaft portion. The roller tube connector is free from contact with the clutch spring.

Abstract: A mechanism for controlling adjustment of a blind or the like, the mechanism including, a fixable member which in use is fixed in position relative to the blind, a rotatable member located proximate the fixable member being rotatable relative to the fixable member about an axis of rotation to adjust the blind, an elongate member a proximal end of which is located proximate the rotatable member, the elongate member having a longitudinal axis that intersects the axis of rotation, and a continuous pull element which interacts with the rotatable member, the pull element is movable relative to the fixable member to rotate the rotatable member, the pull element is arranged relative to the elongate member extending from the rotatable member towards a distal end of the elongate member and back towards the rotatable member so as to limit movement of the pull element in a direction substantially perpendicular to the longitudinal axis of the elongate member.

Abstract: An apparatus for selectively activating a window treatment includes an input member, such as a pulley activated by a bead chain, an output member such as a sleeve activating a mandrel, a stationary guard for mounting the window treatment and a rotor. The rotor, pulley, and stationary base are coupled to form a cycloid drive, wherein rotation of the pulley causes the rotor to precess with respect to the pulley.

Abstract: A looped-cord system includes a beaded cord having a set of beads connected in series to form a loop with a space between each pair of adjacent beads. In one embodiment a stop sized to fit within the space between a pair of adjacent beads is attached to a housing. A resilient finger located opposite the stop pushes a portion of the beaded cord adjacent to and not engaging the sprocket against the stop so the stop is within a space between a pair of adjacent beads, thereby preventing movement of the cord loop. Applying tension to the cord loop overcomes the resilient finger and moves the cord away from the stop enabling movement of the cord loop. In another embodiment a key engages the sprocket preventing the sprocket from turning until tension is applied to the cord loop by proper installation of the tensioner on the cord loop.

Abstract: An improvement of roller blinds controller is provided, it mainly comprises a cylindrical rod passing through a side cover and fixing therewith; a bead chain sprocket and a number of torsion springs fitted on the cylindrical rod, and an outer sleeve cover fitted on the outside, wherein: the cylindrical rod has a ridge portion protruded from the circumferential surface thereof, while the side cover has a has a central aperture with a annular edge portion, the cylindrical rod can be fixed with the side cover by the snap-fitting of the annular edge portion between the flange portion and the ridge portion.

Abstract: In a door operator having a driving end and a weight carrying end, an electric motor mechanism, a first electromagnetic clutch mechanism, a combination pull-chain disc and brake, a second electromagnetic clutch mechanism are disposed in sequence between the driving end and the weight carrying end, the mechanisms being connected by rotating shafts and a hollow shaft, in which when the electric motor mechanism is electrically powered, the first electromagnetic clutch mechanism moves the hollow shaft to separate from a brake device, and the second electromagnetic clutch mechanism connects the driving end to the weight carrying end; and when the electric motor mechanism is not electrically powered, the first electromagnetic clutch mechanism connects the hollow shaft to the brake device, and the second electromagnetic clutch mechanism separates the driving end from the weight carrying end.

Abstract: A single or dual channel cord enclosure adapted to hide at least a portion of a cord drawing a shade or blind up or down is included as part of an apparatus, which may also include a roller mechanism adapted to drive a roller to operate an architectural cover, and a cord mechanism adapted to drive the roller mechanism. The enclosure may completely enclose the cord and utilize a slider to actuate the cord within the cord channel enclosure. In another embodiment, an apparatus for actuating an architectectural covering includes an enclosure configured to receive a cord mechanism; a roller mechanism provided on an end of the enclosure; and a slider configured to be movably engaged to the enclosure so that moving the slider actuates the roller mechanism to lift or lower the architectural covering. Also included is a method of making an apparatus for actuating an architectectural covering.

Abstract: Provided is an endless operation cord that is easy to replace. The present invention provides an operation cord including: a main cord having one and the other ends; a first coupling part disposed at the one end; and a second coupling part disposed at the other end. The first and second coupling parts can be coupled together directly or via a coupling member and can be coupled or uncoupled by means of a relative rotation between the adjacent coupling parts or between the adjacent coupling parts and coupling member or a relative movement in a direction other than a length direction of the main cord between the adjacent coupling parts or between the adjacent coupling parts and coupling member.

Abstract: The invention relates to an operating unit (1) for architectural coverings, in particular roller blinds or shades. The unit (1) includes a stationary base member (37), a rotatable driving member (39), a rotatable driven member (29) and a brake mechanism (71, 73, and 75). The brake mechanism (71, 73, and 75) automatically arrests rotation of the driven member (29) in respect of the stationary base member (37), when not rotated by the driving member (39). The brake mechanism includes a first wrap spring (73), adapted to yield a predetermined minimum brake force, and at least one second wrap spring (75), different in size from the first wrap spring (73) and adapted to yield a supplementary brake force, which together with the predetermined minimum brake force amounts to a predetermined maximum brake force.

Abstract: A winder, including a support member having a wall portion and a spindle; and a housing rotatably mounted onto said spindle, said housing having a drive portion for receiving a cord that controls the rotation of said housing for extending and retracting a blind; wherein said housing is selectively moveable along the spindle between an open position and a closed position, such that when the housing is placed in the open position, the drive portion is exposed for receiving said cord, and when the housing is placed in the closed position, the wall portion covers at least a part of the drive portion to resist disengagement of the entire cord from the drive portion.

Abstract: A curtain bead chain fixing device includes a bead chain guide way through which a bead chain as a pull cord for controlling a curtain is extended and thereby becomes connected to the fixing device, and an elastically movable interfering element being normally pushed into the bead chain guide way to interfere with the free movement of the bead chain in and along the bead chain guide way. When the fixing device is adequately mounted to a wall surface according to specified installation procedures, the interfering element is forced out of the bead chain guide way to release the bead chain therefrom. Therefore, a user of the curtain is urged and guided to adequately mount the fixing device to hold the bead chain in place, and undesired accidents caused by a swinging bead chain can be avoided.

Abstract: A mounting system for an architectural covering including a pair of mounting brackets, a roller operably connected to each of the mounting brackets, and an end plug at least partially received within the roller and operably connected to one of the mounting brackets. The end plug selectively transitions between an extended position and a retracted position and includes a sleeve, a plunger received within the sleeve, and a spring at least partially received within the plunger for biasing the plunger away from the sleeve. The plunger includes a center or body section and at least two radially spaced tongues extending from a first end of the center section. In the extended position a first portion of the plunger projects from the sleeve and in the retracted position at least a portion of the first portion of the plunger is received within the sleeve.

Abstract: A blind for a building opening, and having a head rail, attachable adjacent to the building opening; a first blind panel stored in the head rail, and adapted to be lowered as a loop defing two loop parts, over the building opening; a second blind panel stored in the head rail and adapted to be lowered over the building opening, and wherein the first panel is formed of light permeable material, whereby to admit at least some light into the interior of the building, and the second panel is formed of light impermeable material; transverse blind strips on the first panel, at spaced intervals there across; and, blind panel control mechanism in the head rail whereby the first blind panel loops can be adjusted so as to adjust the transverse blind strips between open and closed positions.

Abstract: A window shade includes a frame (1), a shade (2), a shade driving mechanism (3), and a bead chain (4) for driving the shade (2) through the shade driving mechanism (3). A barrel (5) is mounted to the frame (1) at a location corresponding to the bead chain (4). A sliding block (7) is slideably received in the barrel (5) and connected to a handle (8) mounted outside of the barrel (5) by a link (9) extending through a slit (6) in the barrel (5). The bead chain (4) is wound around a fixed pulley (16) mounted to an end of the barrel (5). The sliding block (7) is fixed to a section (4a) of the bead chain (4) received in the barrel (5).

Abstract: A cover for the clutch of a roller blind. The clutch includes a sprocket rotationally driven through the application of tension to a chain or cord received at least partially about the sprocket. The clutch also includes an abutment member against which a stopper on the chain or cord bears to limit rotation of the sprocket in a pre-determined direction. The cover comprises a plate member fixed to the clutch and prevented from rotation with the sprocket. The cover has a notch sized to receive at least a portion of the stopper when the stopper contacts the abutment member.

Abstract: An anchor apparatus for a bead chain of window covering comprises a first anchor member, a second anchor member, an anchor plate and a main fastener. The first anchor member has a first space to hold the second anchor member. The anchor plate is held in a lower side of the first space and a second space of the second anchor member to form a coupling relationship with the main fastener. The main fastener runs through the lower sides of the first and second anchor members and the anchor plate for closing while the upper sides of the first and second anchor members are opened, thereby allow the bead chain to be moved. The main fastener can be released to allow the anchor plate to push the second anchor member to move with the upper sides of the first and second anchor members closed to fix the bead chain.

Abstract: A device for disabling a window treatment operated by a cord includes at least one member with a gear engaging the cord. When the cord is not tensioned correctly, the gear of the member intermeshes with teeth on another member impeding movement of the cord along its length. In one embodiment, two gears engage different sections of the cord and intermesh with each other. In another embodiment, a stationary member intermeshes with the gear of member selectively pivoted by the cord in accordance with the tension on the cord.

Abstract: A roller shade clutch is disclosed. In exemplary embodiments the clutch may comprise a housing, a ribbed post extending axially from the housing, a sprocket wheel mounted for rotation around the post, at least one torsion spring mounted for rotation on the ribbed post, a chain guard, a boss extending axially from the sprocket wheel, and a drum disposed over the ribbed post, the torsion spring and the boss.

Abstract: A composite pull-chain disc mechanism with brake function for a door operator comprises a torsional spring having de-twisting and twisting sides. The weight of a door curtain always acts on the de-twisting sides, so that the inner diameter of the torsional spring is induced to shrink to brake the rotation of the central shaft of the door operator. If twisting sides bears an external force, the inner diameter of the torsional spring is induced to enlarge to release braking of the central shaft. Furthermore, the composite pull-chain disc mechanism can be adapted to an electric door operator. In the case of detaching an electric motor mechanism during maintenance, the door operator can still be operated to open/close a door in a manual mode through the composite pull-chain disc mechanism.

Abstract: An operating control system for a retractable shade including a roller reversibly rotatable within a headrail includes a clamp system for gripping an endless operating cord in a neutral position to prevent rotation of the roller and a tensioner if properly mounted in a fixed position will release the clamp system to permit rotation of the roller while positioning the runs of the endless cord in a closely spaced relationship to minimize the risk of an infant or child becoming entangled in the cord.

Abstract: A pull cord mechanism for a window shade includes a frame (1), a shade (2), a shade driving mechanism (3), and a bead chain or pull cord (4) for driving the shade driving mechanism (3). A sliding block (7) is slideably received in a barrel (5) receiving the pull cord (4). A handle (8) is mounted outside of the barrel (5) and connected to the sliding block (7). A pivotal plate (12a) is pivotably supported in a passageway (11) of the sliding block (7). A recess is defined in one of a rear side (12a1) of the pivotal plate (12a) and a wall (11a) of the passageway (11) facing the rear side (12a1). A positioning block (12c) is located between the rear side (12a1) of the pivotal plate (12a) and the wall (11a) of the passageway (11). A gear (12b) is located between the section (4a) of the pull cord (4) and a front side (12a2) of the pivotal plate (12a) opposite to the rear side (12a1).

Abstract: The invention is a chain locking mount for mounting the roller chain portion of a roller blind to a support surface such as a wall or window frame. The mount is configured to prevent the chain from being operated when the mount loosens from the support surface. The mount includes a housing with an aperture formed therein which is dimensioned to permit the roller chain to pass through the aperture. The mount further includes a lock member mounted adjacent the aperture, the lock member being movable between a locked position wherein the chain is prevented from moving through the aperture and an open position wherein the chain is free to move through the aperture. The mount is secured to the surface by a screw, the screw being coupled to the lock mechanism to retain the lock member in its open position when the screw is tightened to the surface. The lock member is biased towards its locked position so that the lock member moves towards its locked position when the screw is loosened from the surface.

Abstract: Operating system (1) for rotatably controlling retraction and deployment of an architectural covering. The operating system includes a drive pulley wheel (3) having a circumferential rim (5), a length of looped drive cord (9) operatively engaged with the pulley wheel (3) about its circumferential rim (5) and having depending portions on opposite sides of the pulley wheel (3), a cover (7) co-extensive with a portion of the circumference of the pulley wheel (3) and at least one stopper (19) attached to a portion of the length of the drive cord (9) and adapted to engage the cover (7) to stop rotation upon a predetermined amount of rotation of the pulley wheel (3). The pulley wheel is provided with a cavity (17) on its toothed circumference for receiving the at least one stopper (19) to prevent it from engaging the cover (7).

Abstract: A mechanism for controlling adjustment of a blind or the like, the mechanism including, a fixable member which in use is fixed in position relative to the blind, a rotatable member located proximate the fixable member being rotatable relative to the fixable member about an axis of rotation to adjust the blind, an elongate member a proximal end of which is located proximate the rotatable member, the elongate member having a longitudinal axis that intersects the axis of rotation, and a continuous pull element which interacts with the rotatable member, the pull element is movable relative to the fixable member to rotate the rotatable member, the pull element is arranged relative to the elongate member extending from the rotatable member towards a distal end of the elongate member and back towards the rotatable member so as to limit movement of the pull element in a direction substantially perpendicular to the longitudinal axis of the elongate member.

Abstract: An operation apparatus of a sunlight shielding apparatus is provided which is equipped with a fail-safe function so as not to hinder behavior of a dweller or the like, and, in usual operation, unnecessary activation of the fail-safe function is prevented, so that enhanced operability can be realized.

Abstract: A loop cord tension device assembly includes a housing, a spring member connected to the housing, a loop cord retention member connected to the housing, and a locking body connected to the spring member. The loop cord retention member has a channel sized and configured to receive a portion of a looped cord. The locking body is moveable from a locked position to an unlocked position. The portion of the loop cord received within the channel of the loop cord retention member is not rotatable when the locking body is in the locked position and the portion of the loop cord received within the channel of the loop cord retention member is rotatable when the locking body is in the unlocked position. The loop cord tension device assembly may be connected to the looped cord of a window covering and mounted to a structure to improve child safety.

Abstract: A tension device that prevents a window covering from operating properly until the tension device is installed. The tension device incorporates a drive wheel, casing, anchoring arm and drive stud. The drive stud has two sections, one keyed and one cylindrical. Before the tension device is installed, the keyed section of the drive stud engages the drive wheel and the casing, thereby preventing them from rotating relative to each other. When the tension device is installed, the drive stud must be inserted into the anchoring arm causing the keyed section of the drive stud to disengage the drive wheel and thereby allow the drive wheel to rotate relative to the casing.

Abstract: A safety device for a roller blind comprises: a housing, a cover and a locking member, a drive mechanism and an elastic member that are disposed between the cover and the housing. The locking member is disposed between the drive mechanism and the housing, so that when an excessively big pulling force is applied to the bead chain, the bead chain and the drive mechanism will be automatically disengaged from the driven mechanism. Hence, the security of the safety device for the roller blind is considerably improved.

Abstract: A manual banner roll-up mechanism has a first tube, a second tube, a foldable material, a securing base, a washer, a linking member, a rope, a securing cylinder, a first plug and two mounting supports. The first tube is rolled up with a foldable material. Another end of the foldable material is connected to a second tube. One end of the first tube is jacketed by a securing base, and the washer, the triggering member and the rope are locked onto the securing cylinder by a bolt. Another end of the first tube is jacketed by the first plug that has a base, a positioning member, a spring, and a cover. A first positioning member of the securing base and a second positioning member of the first plug enable the first tube to be hung between the two mounting supports.

Abstract: In a window treatment with a cover for covering a window or other architectural opening, a cord assembly includes an elongated housing arranged to be installed next to the cover. The housing includes a channel around most of its periphery receiving the cord. Operating elements are provided on the housing to move the cord with respect to the housing to operate the window treatment and its cover.

Abstract: A safety assembly for a roller blind has a fixing device, a moving device, a flexible element, a rotating device, a hooking device and a bead cord. The fixing device has a base panel, a stopping arm and a reset mount. The moving device is movably connected to the fixing device between the stopping arm and the reset mount. The flexible element is mounted between the reset mount and the moving device to push the moving device to move relative to the fixing device. The rotating device is rotatably mounted on the moving device and has a stopping disc and a rotating disk. The hooking device is mounted securely below the fixing device, the moving device and the rotating device. The bead cord is mounted between the rotating device and the hooking device to allow the rotating device rotating relative to the moving device by pulling the bead cord.

Abstract: A sprocket having a slot formed therethrough can be disposed about the non-rotating support rod of a given roller door. This sprocket is then attached to the door-supporting frame such that the sprocket is positioned externally to the roller door. A connector can serve to effect this attachment. This connector might comprise a plurality of bolts with support sleeves. By this approach, the sprocket can be maintained at a fixed distance from the door supporting frame. This connector might also comprise an adjustable connector that adjustably and fixedly connects the sprocket with respect to the door-supporting frame. By one approach, the sprocket connects directly to the door-supporting frame. By another approach, if desired, the sprocket connects to a frame interface which connects, in turn, to the door-supporting frame. This frame interface can itself also have a slot formed therethrough to again facilitate placing the frame interface into an installed position.

Abstract: A wheel turns about a fixed shaft to reel in or pay out an aperture closure member. A motor provides drive to the wheel through a belt. The motor is mounted on a slider plate which can slide relative to a fixed plate, which is secured to the shaft. As the slider plate slides away from the shaft, the belt comes into tension allowing the motor to drive the wheel.