Abstract: The roller shade system provides increased support, additional adjustments and/or increased safety. The slip plate allows the brake to slip forward and minimize damage to the clutch spring when a user pulls too hard on the hembar. The center drive mechanism extends through a bracket to allow the drive shaft to distribute power in both directions and drive two shade tube simultaneously. The tube adapter absorbs force from the spinning shade tube to minimize damage to the other components and the bead chain. An adjustment arm is adjusted to help level the shade band. The shade bands may be removed without disturbing the other shade bands in the system. A height of a hembar may be adjusted by rotating a rod within the hembar.

Abstract: A seal enclosure protects a tubular motor that is configured to drive an awning roller. The seal enclose includes a motor box sized to fit over an end of the tubular motor, a motor box extension engaging the motor box and including a circumferential protrusion, a gasket positioned between the motor box and the motor box extension, and a flexible seal engaging the circumferential protrusion and configured to engage the awning roller. The motor box, the motor box extension and the flexible seal define a closed housing for the tubular motor.

Abstract: A position-fixing system for a window covering, which has a roller tube, includes a variable diameter screw, a guiding portion, and an elastic member. The variable diameter screw has a working section gradually broadening in a radial direction thereof. The guiding portion extends along an inner wall of the roller tube in an axial direction thereof. The elastic member fits around the variable diameter screw, and is movable along the guiding portion. The elastic member has a meshing portion provided on an inner side thereof to mesh with the working section, and a guided portion provided on an outer side thereof to slide along the guiding portion. When the roller tube rotates in a direction, the elastic member moves along the working section and deforms, whereby to exert a gradually increasing unit tightening force to the variable diameter screw in the radial direction, dampening its rotation.

Abstract: In one aspect, a spring assist module for a covering includes a torsion spring that is selected according to a protocol such that the torsion spring drives a driven part of the covering with a constant operating force. In another aspect, a roller blind includes a roller and a torsion spring operatively coupled to the roller, with the torsion spring having a spring characteristic(s) selected according to a protocol that matches the spring characteristic(s) to a torque curve associated with the roller blind to drive the roller with a constant operating force. In a further aspect, a method for selecting a spring for use within a roller blind includes determining a parameter(s) of the roller blind, determining a torque curve for the roller blind based at least partially on the parameter(s), and selecting a spring characteristic for a torsion spring of the roller blind that matches the torque curve.

Abstract: Motorized manoeuvring device (1) intended to manoeuvre a moving windable fabric screen (3), the motorized manoeuvring device comprising: an actuator (4), comprising a hollow housing (41) containing a gear motor, a mounting end-plate (7a), characterized in that the end-plate (7a) comprises a first support (11) extending from the end-plate along a first longitudinal axis (X-X?) and cooperating with the housing (41) of the actuator (4) and in that it comprises a second support (12) extending from the end-plate along a second axis distinct from the first (Ya-Ya?, Z-Z?) and in that the hollow housing, notably the tubular hollow housing, of the actuator, is closed by the first end-plate support.

Abstract: A spring assist module for window covering includes a stationary member, at least one torsion spring, and at least one rotatable member. The stationary member may be connectable to an operating member of the window covering. The at least one rotatable member may be keyable to a driven part of the window covering, such that rotation of the driven part rotates the at least one rotatable member. The at least one torsion spring may include a first end operatively coupled to the stationary member and a second end operatively coupled to the at least one rotatable member. The spring assist module may be pre-assembled as a self-contained unit.

Abstract: A flexible yet durable roll-down curtain is normally stored in a rolled condition, and is unrolled during use. The curtain includes plural, vertically spaced apart rods extending through a width of the curtain. When rolled, the curtain wraps around an elongate, spring-loaded mandrel assembly. The mandrel assembly couples with a pair of mounting brackets mounted at opposing sidewalls of a temperature-controlled compartment. A pair of locking brackets disposed directly opposite one another at opposing sidewalls engage opposing ends of a rod extending through the curtain, to retain the curtain in a deployed position. A flexible side seal provides a sealing engagement vertically along each side edge of the curtain. When deployed, the curtain extends from ceiling to floor, and from sidewall to sidewall, forming a barrier against uncontrolled air movement from a space on either side of the curtain to a space on an opposing side of the curtain.

Abstract: A spring-assisted cordless roller shade without clutch system includes a tubular body defining an internal space. A shade is wound on the tubular body. The internal space has a first section and a second section. In each of the first and second sections are mounted a connector, a central shaft assembled with the connector, a fixing member connected with the central shaft and a subsidiary shaft disposed on the fixing member. An elastic member is disposed between the connector and the central shaft to provide a frictional force. A rotational member and a torsion spring are mounted on the subsidiary shaft of the first section and rotatable along with the tubular body. A constant force belt spring module is assembled with the subsidiary shaft of the second section. When the operational force applied to the shade disappears, the shade is immediately located.

Abstract: A winding device for a roller blind arrangement, in particular for a vehicle, which has a winding element having a longitudinal axis. The winding element is constructed to be rotatably supported about the longitudinal axis on a vehicle and to wind and unwind a roller blind web. The winding device further has a coil spring having an axially extending hollow space, wherein the winding element is connected to the vehicle by means of the coil spring and the coil spring enables a rotational movement of the winding element relative to the vehicle. In addition, the winding device has a rod element which is arranged in the hollow space of the coil spring for guiding the coil spring, wherein the rod element is constructed in such a manner that the rod element radially tensions the coil spring.

Abstract: A roller shade is disclosed having a counterbalancing assembly with an optimally pretensioned spring that lowers the torque load on the motor of the roller shade throughout the rolling up or rolling down cycles. The roller shade comprises a roller tube, a gudgeon pin having a first stop, a gudgeon body having a through bore and rotatably connected about the gudgeon pin and operably connected to the roller tube, a limit nut operably connected to the gudgeon body and adapted to axially travel along the gudgeon pin within the through bore, a spring, a first spring carrier connected to the first end of the spring and operably connected to the gudgeon pin, and a second spring carrier connected to the second end of the spring and operably connected to the roller tube. The spring is pretensioned and the limit nut abuts the first stop thereby locking the pretension.

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 rollable screen comprises a rotatable winding tube for a screen mounted for rotation in a stationary mounting assembly and a spring for loading said winding tube in a direction for winding the screen onto the winding tube. A first end of said spring is connected to the winding tube and a second end is connected to a mounting part positioned within the winding tube and connected to the stationary mounting assembly. Said mounting part comprises projecting locking elements for cooperation with corresponding locking members of the mounting assembly and for a rotation relative thereto between a first rotational position in which the mounting part can be inserted in or removed from the mounting assembly, and a second rotational position in which the locking elements and locking members prevent any translational movement of the rollable screen relative to the stationary mounting assembly.

Abstract: A roller blind includes a roller, a web wound on the roller, and a damper unit for damping the rotation of the roller. The damper unit includes a cylinder, an axle and a damper. The cylinder is inserted in the roller so that they are rotatable together. The axle is inserted in the cylinder so that the cylinder is rotatable on the axle. The damper is provided between the cylinder and the axle to damp the rotation or the cylinder on the axle.

Abstract: A coilable shade includes a main frame to which left and right fixed seats are mounted. A drum is rotatably coupled to the right fixed seat and receives a spring receiving a shaft extending through a positioning seat. An end of the coiling spring is fixed to the positioning seat. The other end of the coiling spring is fixed to a connection seat mounted to the left fixed seat. A rotating unit is mounted in a jacket and rotatably coupled to a positioning rod fixed to the left fixed seat. A fastener is slideable along a track in a rotating member of the rotating unit to control unfolding, coiling, and positioning of a shade. The rotating unit further includes a sleeve received in the rotating member. A soft ring buffer is received in an annular groove of the sleeve and contacts an inner periphery of the rotating member.

Abstract: A spring assist module for window covering includes a stationary member, at least one torsion spring, and at least one rotatable member. The stationary member may be connectable to an operating member of the window covering. The at least one rotatable member may be keyable to a driven part of the window covering, such that rotation of the driven part rotates the at least one rotatable member. The at least one torsion spring may include a first end operatively coupled to the stationary member and a second end operatively coupled to the at least one rotatable member. The spring assist module may be pre-assembled as a self-contained unit.

Abstract: A spring assist module for window covering includes a stationary member, at least one torsion spring, and at least one rotatable member. The stationary member may be connectable to an operating member of the window covering. The at least one rotatable member may be keyable to a driven part of the window covering, such that rotation of the driven part rotates the at least one rotatable member. The at least one torsion spring may include a first end operatively coupled to the stationary member and a second end operatively coupled to the at least one rotatable member. The spring assist module may be pre-assembled as a self-contained unit.

Abstract: A stored energy emergency barrier release device comprising a barrier and a barrel member for storing the barrier thereon. The barrel member is rotatable on a stationary counterbalance shaft and a push down shaft. The release device further includes a push down spring coupled to the push down shaft for storing potential energy in order to exert a closing force on the barrier when the release device is positioned from an engaged position to a released position. The release device includes a reset mechanism interfaced with the push down spring for transmitting a lifting torque to the push down spring in response to moving the barrier from a first position to a second position to store energy within the push down spring.

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 winding shaft for a roller blind system with a main body for holding a rolled up planar structure that can be unwound from the winding shaft, wherein the main body takes the form of a partial cone around a winding shaft axis. The main body is formed as a hollow metal tube shaped as a partial cone.

Abstract: A method for controlling a motorized roller shade is provided. The motorized roller shade includes a shade attached to a shade tube, a microcontroller and a DC gear motor disposed within the shade tube. The DC gear motor includes a housing fixed to the shade tube and an output shaft coupled to a support shaft fixed to a mounting bracket. The method includes receiving a command from a remote control, and moving the shade to a position associated with the command by energizing the DC gear motor to rotate the shade tube and the DC gear motor housing while the DC gear motor output shaft and support shaft remain fixed.

Abstract: A security shade for use in an automotive vehicle. The security shade includes a cassette having a roll tube arranged therein. The roll tube has a shade panel fixed to the roll tube at one end thereof. The security shade also includes a bearing arranged in an end of the roll tube and a spring housing arranged in an end of the cassette. A motor spring is arranged within the spring housing and is axially fixed with relation to the roll tube and the cassette. The security shade also includes an end cap arranged over an end of a cassette. The security shade has the compressible end cap over each end of the roll tube and cassette.

Abstract: A roof for a computer rack aisle is provided. The roof has a canopy that may be flexible and/or fire-resistant. The canopy has a retracted position an extended position. In the retracted position, the canopy may be wound around a spool. In the extended position the canopy may cover the top of an aisle between two computer racks. A selectively releasable retainer holds the canopy in the extended position while releasing the canopy to return to the retracted position when a predetermined condition is met. The canopy retractor is provided to return the canopy to a retracted position. The canopy having first and second lateral edges with flanges running from a position approximate a front portion of the canopy and to a position approximate a rear portion of the canopy. The flanges can be received within a canopy guide track to facilitate the smooth movement from the extend position to the retracted position.

Abstract: Certain embodiments of a system for reducing backlash include a member geared for rotation in first and second directions. In various implementations, a first motor causes rotation in the first direction with an output biased to preclude space between mating gear components in the first direction, and a second motor, which is mechanically independent of the first motor, causes rotation in the second direction with an output biased to preclude space between mating gear components in the second direction.

Abstract: A motorized roller shade is provided. The motorized roller shade includes a shade tube in which a motor unit, a controller unit and a power supply unit are disposed. The controller unit includes a controller to control the motor. The power supply unit includes at least one bearing rotatably coupled to a support shaft. The motor unit includes at least one bearing, rotatably coupled to another support shaft, a DC gear motor and a counterbalancing device. The output shaft of the DC gear motor is coupled to the support shaft such that the output shaft and the support shaft do not rotate when the support shaft is attached to a mounting bracket.

Abstract: A window cover system includes an extendible window cover with a pair of lift cords. A lift cord pulley shaft is coupled to a pair of spaced apart lift cord pulleys. A spring drive unit has a beveled gear system with a first gear that is spring biased to resist rotation of first gear in one direction of rotation, and a second gear meshed with the first gear. The lift cord pulley shaft extends through the second gear and is configured to rotate therewith.

Abstract: A transmission assembly for a roller blind has a mounting frame, a roller, a coil spring, a spring axle, a turning element, a torsional spring, a major damper, a positioning device and a blind cloth device. The roller is mounted in the mounting frame. The coil spring is mounted in the roller. The spring axle is mounted in the coil spring. The turning element is connected to the spring axle. The torsional spring is mounted in the turning element. The major damper is connected to the coil spring and has a turning rod. The positioning device is mounted in the roller and has a rotating mount, a rail mount and a positioning ball. The rail mount is mounted in the rotating mount and has two rails. The positioning ball is mounted between the rotating mount and the rails. The blind cloth device is mounted the mounting frame.

Abstract: A drive arrangement for a roller curtain covering an opening defined by a frame includes a drum mounted horizontally across one side of the opening, a pair of hollow drive shafts fixed against rotation in opposite ends of the drum, and a pair of coaxial tension shaft portions fixed to the frame and received through respective hollow drive shafts. At least one coil spring is associated with each tension shaft portion, each spring having a first end fixed to a tension shaft portion and a second end fixed to the drum. A pair of drive motors are operatively connected to respective hollow drive shafts for synchronously rotating the drive shafts in order to coil a roller curtain on the drum.

Abstract: The present invention provides a roll-up shade apparatus for a vehicle with enhanced assemblability. This roll-up shade apparatus includes a shade that opens and closes an internal opened part of a roof; a retractor that rolls up the shade from a base-end thereof; second wire drums disposed in coaxial with the retractor, a wire being wound around each of the second wire drums that winds up or feeds the wire together with an opening/closing of the shade; elastic members that engage the retractor with the second wire drums.

Abstract: A transmission assembly for a roller blind has a mounting frame, a roller, a coil spring, a spring axle, a turning element, a torsional spring, a major damper, a positioning device and a blind cloth device. The roller is mounted in the mounting frame. The coil spring is mounted in the roller. The spring axle is mounted in the coil spring. The turning element is connected to the spring axle. The torsional spring is mounted in the turning element. The major damper is connected to the coil spring and has a turning rod. The positioning device is mounted in the roller and has a rotating mount, a rail mount and a positioning ball. The rail mount is mounted in the rotating mount and has two rails. The positioning ball is mounted between the rotating mount and the rails. The blind cloth device is mounted the mounting frame.

Abstract: A stored energy emergency barrier release device comprising a barrier and a barrel member for storing the barrier thereon. The barrel member is rotatable on a stationary counterbalance shaft and a push down shaft. The release device further includes a push down spring coupled to the push down shaft for storing potential energy in order to exert a closing force on the barrier when the release device is positioned from an engaged position to a released position. The release device includes a reset mechanism interfaced with the push down spring for transmitting a lifting torque to the push down spring in response to moving the barrier from a first position to a second position to store energy within the push down spring.

Abstract: A window shade that reduces the risk of an individual becoming entangled in cords used to operate the shade includes a headrail adapted for horizontal mounting above a window, a shading material attached to the headrail, and at least one cord for raising and lowering the shading material. The cord is attached to a location adjacent a lower end of the material, and extends upward through cord guides toward the headrail. The cord is encased within a collapsible shroud attached to each cord guide. The shroud is adapted to longitudinally extend as the shading material is lowered toward a deployed position, and then longitudinally collapse as the shading material is raised toward a stowed position. The cord is secured to and is wound about a spool fixed to a spring-loaded roller. The roller provides tension on the cord that counterbalances the weight of the shade so that the shading material may be positioned at any desired level. The shade does not require a graspable cord or cords for operation.

Abstract: In a screening arrangement comprising a top element, a bottom element, and a screening body, the top element includes two end pieces (410) and a spring-biased roller bar mounted on a roller shaft (461). The roller shaft (461) and one of the end pieces (410) constitute an integral one-piece unit formed by molding.

Abstract: A window covering includes a mounting unit, a shading unit, and a winding unit. The mounting unit includes a first fixing member and a second fixing member. The shading unit includes a rotating axle, a curtain member fixed at one end to the rotating axle and which is wound on and unwound from the rotating axle, a first rotating member, and a second rotating member. The first rotating member and the second rotating member are fixed to the rotating axle and extend respectively through the first fixing member and the second fixing member to support rotation of the rotating axle therebetween. The winding unit is mounted to the first fixing member and includes a spring reel secured to the first rotating member to rotate therewith, an auxiliary wheel, and a spring wound around the auxiliary wheel and which is fixed at one end to the spring reel.

Abstract: A spring drive device is for use with a sunshade assembly which includes a coupling shaft coaxial to and rotatable with a winding shaft and formed with a guided path. The spring drive device includes a spring member disposed in and connected to a shell unit. A connecting shaft is formed with a guideway which has an initial region engaged with the spring member, such that when the connecting shaft is moved along a coupling route, the guideway is kept in slidable engagement with the spring member until a relay region of the guideway reaches the spring member. The connecting shaft is engageable with the coupling shaft to align the guided path with the guideway such that when the movement of the connecting shaft is continued after the relay region reaches the spring member, the guided path is brought to take over the slidable engagement with the spring member.

Abstract: The present invention advantageously provides a motorized roller shade that includes a shade tube, a motor/controller unit and a power supply unit. The motor/controller unit is disposed within the shade tube, and includes a bearing, rotatably coupled to a support shaft, and a DC gear motor. The output shaft of the DC gear motor is coupled to the support shaft such that the output shaft and the support shaft do not rotate when the support shaft is attached to the mounting bracket.

Abstract: A winding shaft for a roller blind system with a main body for holding a rolled up planar structure that can be unwound from the winding shaft, wherein the main body takes the form of a partial cone around a winding shaft axis. The main body is formed as a hollow metal tube shaped as a partial cone.

Abstract: A device that can be used as an advertising display device, an information display device or as a shade or screen that has novel ways to charge the sheet retraction spring, novel ways to prevent tampering with the charge on the spring once the device in operation and that may utilize a pull bar which allows identification of information on the sheet while in a rolled-up state without an additional label.

Abstract: In a screen device, to provide a screen device in which a roller pipe includes a revolving shaft 5 on which a coil spring 6 is wound integrated therein, connected to a rotator 52 rotatably disposed with respect to a stator 51 connected to a lower end of the revolving shaft, and is rotatably stored in a housing frame, the stator includes a plurality of radially arranged claws 53, holding portions 57 arranged radially on a lower surface portion of a cap member 55 which is detachably disposed at a lower end of the housing frame corresponding to the claws of the stator are disposed, the holding portions each have a holding space 58 for receiving the claw in the interior thereof, the holding space is opened outward at one end on the side of receiving the claw and closed at the other end to allow adjustment of initial winding of a coil spring integrated in a roller pipe and superior in opening-and-closing operability of a screen and manner it is retracted.

Abstract: The invention relates to a winding shaft for a roller blind device with a winding tube (2) and a torsional tensioning device (7) that, with a first end (7a), is coupled to the winding tube (2) in a manner that enables it to rotate in relation thereto. The torsional tensioning device (7), at least with a second end, is coupled to the winding tube (20 so that it is rotationally fixed and axially displaceable in relation thereto.

Abstract: A positioning assembly is mounted to a partitioning screen including a roller and a screen member. The positioning assembly includes a side strip mounted to a free end of the screen member, two tubular pulling rods, a resilient member, and two retaining rods. Each pulling rod has an inserted segment extending telescopically into the side strip and an extending segment exposed from the respective pulling rod, and formed with a force-bearing portion having a structural strength weaker than a remaining portion of a corresponding pulling rod so as to serve as a point of deformation or fracture when the corresponding pulling rod experiences impact. The resilient member is disposed in the side strip and has opposite ends connected respectively to the pulling rods. Each retaining rod has a connecting portion connected to a respective extending segment, and a securing portion extending away from the side strip for retaining the screen member at an unwound state.

Abstract: A rollable screen comprises a rotatable winding tube for a screen mounted for rotation in a stationary mounting assembly and a spring for loading said winding tube in a direction for winding the screen onto the winding tube. A first end of said spring is connected to the winding tube and a second end is connected to a mounting part positioned within the winding tube and connected to the stationary mounting assembly. Said mounting part comprises projecting locking elements for cooperation with corresponding locking members of the mounting assembly and for a rotation relative thereto between a first rotational position in which the mounting part can be inserted in or removed from the mounting assembly, and a second rotational position in which the locking elements and locking members prevent any translational movement of the rollable screen relative to the stationary mounting assembly.

Abstract: A roller blind device includes a drive shaft and two neighboring roller blinds on the drive shaft that are adapted to be adjustable with respect to each other. At least one of the roller blinds may be uncoupled from the drive shaft without the use of tools. Once uncoupled, the roller blinds may be adjusted with respect to each other. The roller blind may then be coupled to the drive shaft, allowing for the two neighboring roller blinds to be lowered and raised.

Abstract: In a shade system with a bracket supporting a shade storage roll, an anti-reversible power spring apparatus includes a biasing member and a housing with a receiver end and a connector end where the housing encloses the biasing member and the receiver end and the connector end contain the biasing member within the housing. A connector device is connected with the housing and a receiver device is connected with the housing where the connector is connectable with a receiver and where the receiver is connectable with a connector.

Abstract: A sunshade includes a hollow roller, a screen wound on the roller, and a torque unit. The roller has a plurality of positioning protrusions protruding inwardly therefrom. The torque unit includes an axle extending outwardly of the roller, an end plug and a stationary plug inserted fittingly in the roller, a spring, and a bushing. The end plug is sleeved rotatably on the axle. The stationary plug is sleeved fixedly on the axle. The spring is sleeved on the axle and has first and second end portions fixed respectively to the axle and the end plug. The roller, the end plug and the second end portion of the spring are rotated during operation of the screen, so that the spring is twisted and pitches of the spring are decreased. The bushing is disposed between the roller and the spring, is in frictional contact with the protrusions so as to be immovable relative to the roller, and is made of a plastic material.

Abstract: The present invention relates to a garage door screen assembly for covering a garage opening comprising: a cylindrical enclosure, where said enclosure is positioned above the opening; a tracking assembly on each side of the opening; a retractable screen, where said screen is stored within the enclosure when a retracted position and said screen extends downwardly over the opening when in a released position, where said tracking assembly guides the screen between the retracted position and the released position. In one exemplary embodiment, the screen is spring loaded within the enclosure and may include a handle attached to the screen, where said handle provides a means to move the screen between the retracted position and the released position. In another exemplary embodiment, the screen covers the entire garage opening.

Abstract: A roller blind including a roller of having a roller length and a roller outer diameter, a fabric attached to said roller for winding and unwinding from said roller. The fabric has a fabric length, a fabric weight, a fabric height, and fabric thickness. The blind includes a bottom bar having a bottom bar weight, and at least one spring operatively connected to the roller to drivingly rotate the roller in at least one direction of rotation. The spring is selected according to a Protocol such that it's length ensures that it drives the roller with a constant operating force.

Abstract: In a shade system with a bracket supporting a shade storage roll, an anti-reversible power spring apparatus includes at least one biasing system connected with the storage roll wherein the biasing system includes a biasing member with a first end and a second end wherein the first end moves with the storage roll as the storage roll rotates and wherein the second end is held stationary with reference to the storage roll when the storage roll rotates in one direction but not when the storage roll rotates in a second direction. A support for the at least one biasing system is provided wherein the support includes a protrusion that holds the second end against movement when the storage roll is rotated in the one direction but which allows passage of the second end past the protrusion when the storage roll is rotated in the second direction.

Abstract: A cordless window shade apparatus including a headrail having a pulley affixed to the headrail, and a rod coupled to the pulley at one end of the rod. The cordless window shade apparatus also includes a window cover affixed at one end to the headrail and a lift fabric affixed at one end to the rod and at a second end to a bottom portion of the window cover. In addition the cordless window shade apparatus includes a plurality of crossbars removeably coupled to a rear surface of the window cover and a lift chain operably coupled to the pully. The lift fabric is positioned between the plurality of crossbars and the rear surface of the window cover and the window cover may be raised or lowered via the lift chain.

Abstract: Barrier systems and associated methods, including vapor and/or fire barrier systems, are disclosed herein. One aspect of the invention is directed toward a barrier system that includes a barrier coupled to a spool. The barrier is positioned to be wound onto and off of the spool as the barrier moves between a deployed position and a retracted position by a drive assembly. The system further includes a control system coupled to the drive assembly and configured to command operation of the drive assembly. The system still further includes a sensor operably coupled to the control system and positioned to sense barrier position as the barrier moves between the deployed and the retracted positions.

Abstract: A roof for a computer rack aisle is provided. The roof has a canopy that may be flexible and/or fire-resistant. The canopy has a retracted position an extended position. In the retracted position, the canopy may be wound around a spool. In the extended position the canopy may cover the top of an aisle between two computer racks. A selectively releasable retainer holds the canopy in the extended position while releasing the canopy to return to the retracted position when a predetermined condition is met. The canopy retractor is provided to return the canopy to a retracted position. The canopy having first and second lateral edges with flanges running from a position approximate a front portion of the canopy and to a position approximate a rear portion of the canopy. The flanges can be received within a canopy guide track to facilitate the smooth movement from the extend position to the retracted position.