Abstract: A window operating system moves a window sash between an open position and a closed position. A window has a top member operatively connected to a bottom member by a first side member and a second side member to form a frame. The sash is mounted to the frame for relative movement between the open and closed positions. The window operating system comprises an operator and an elongate member. The operator has a rotating member, and the elongate member provides rotational movement to the rotating member of the operator and movement of the elongate member rotates the rotating member thereby opening and closing the sash.

Abstract: The monolithic door of the present invention includes a single panel door having a top edge and a front and back side. The door is hinged at the top edge, within a door opening, to a building structure (in one embodiment, a door frame header). A first cam style winding mechanism is secured towards the top of a first vertical member of the door frame and a second winding mechanism is secured towards the top of a second vertical member of the door frame, opposite the first vertical member. A compression strut on each side of the door is secured to tension straps or cables which are in turn attached to a corresponding winding mechanism secured to the building structure. An actuator operatively connected to the winding mechanisms rotates the drums to either to force the door open or allow the door to close.

Abstract: A storm shield apparatus for protecting persons, animals, or property within a bathing structure includes a retractable shield that is selectively moveable between a stowed position and a deployed position. The shield is moveable along first and second tracks. In some embodiments, the first and second tracks are disposed on opposing longitudinal end walls proximate the bathing structure, and the shield includes flexible roll-top shield sections. A trough with multiple panels may be positioned under the bathing structure to provide an additional barrier to prevent flying debris from penetrating the bathing structure from its sides, longitudinal ends or bottom. The trough mates with the shield in some embodiments to form a protective enclosure.

Abstract: A roller shutter comprising a shutter moveable between a retracted position and an extended position is described. The shutter comprises one or more laths wherein the one or more laths comprise first and second surfaces mechanically connected by first and second sides and one or more internal supports. The one or more internal supports are configured to collapse preferentially with respect to the first and second sides. The presence of the one or more internal supports provides the laths with increased mechanical strength. However, by configuring the internal supports to collapse preferentially with respect to the first and second sides provides a means for absorbing and dissipating this force through the shutter. The roller shutter finds particular application as a horizontal shutter within heavy industry environments.

Abstract: A bracket is configured to be coupled to a support surface and configured to support a roller window shade assembly. The bracket comprises a side configured to bear against the support surface such that the bracket extends away from the support surface and is adjacent an end of the roller window shade assembly. A passage extends through the bracket from the side to an area of the bracket adjacent the roller window shade assembly. The passage is configured to receive electrical wiring therethrough such that the electrical wiring can pass from the support surface to the roller window shade assembly to power a motor of the roller window shade assembly, and the bracket is configured to obscure the electrical wiring when the bracket is coupled to the support surface and supports the roller window shade assembly.

Abstract: A bi-fold door is opened with a lift assembly having a plurality of straps attached to power driven lift drums. A latch assembly retains the closed bi-fold door secure to side columns of a building. The latch assembly has a latch strap attached to a latch drum that accommodates the latch strap to hold the closed bi-fold door in contact with the side columns of the building. A floor anchor assembly anchors the bottom of the closed bi-fold door to the floor below the closed bi-fold door to stabilize and inhibit bending and deformation of the bi-fold door frame.

Abstract: A laser guided parking assistance device and methods of operation are disclosed. An example laser guided parking assistance device includes a tilt switch to detect a vertical orientation of a horizontal orientation. The laser guided parking assistance device also includes a laser to emit a laser light beam in response to the tilt switch detecting the horizontal orientation. In an example, a laser guided parking assistance device is configured as a circuit including a battery power source, a laser diode connected in series with the battery power source, and a first tilt switch connected between the battery power source and the laser diode. The tilt switch opens in a vertical position to cut electrical power from the battery power source to the laser diode. The first tilt switch closes in a horizontal position to connect electrical power from the battery power source to the laser diode.

Abstract: A door locking system includes a door movably mounted on a rail. The door includes rollers rollably coupling the door to the rail. An opener is coupled to the door. The opener positions the door in an open position and a closed position. A lock is coupled to the rail. The lock is in communication with the opener. The lock is automatically positioned in a locked position after the opener positions the door in a closed position. Thus, the door is retained in the closed position.

Abstract: A vehicle construction, having a displaceable top which includes a linkage that, on each of its two sides, in relation to a vertical longitudinal center plane of the top, and can have one link arrangement, the link arrangement being pivotably mounted at a main bearing that is fixed relative to the vehicle. In a closed position of the top, a top surface element abuts against a component part that is fixed relative to the vehicle via a sealing arrangement, wherein the sealing arrangement is arranged at a sealing carrier unit, which can be pivoted with respect to the component part that is fixed relative to the vehicle and with respect to the top surface element.

Abstract: The invention relates to a closure device for closing off, at least in part, a cavity (1) that is open at its top, said device comprising a set of panels (3) suitable for forming a closure cover and cover support means (13). In the invention, each panel has link means for linking to the neighboring panel(s) (3) so as to enable said set of panels (3) to go from a stacked configuration, in which they are superposed on one another in order to open up said opening in said cavity (1) at least in part, to a deployed configuration, in which the panels of at least some of said set of panels (3) extend in alignment with one another while bearing against said cover support means (3). Said device further comprises elastically deformable means (4) suitable for being compressed by said panels when said set of panels (3) are in the stacked configuration.

Abstract: A covering for an architectural opening has a horizontal movable rail supported by cords, with a variety of configurations which allow the movable rail to be moved up and down while concealing the cords.

Abstract: An architectural cover operating assembly comprising a roller mechanism adapted to drive a roller to operate an architectural cover, a cord mechanism adapted to drive the roller mechanism; and an enclosure adapted to conceal at least a portion of the cord mechanism. The enclosure comprises a clutch assembly configured to receive the roller mechanism. The clutch assembly comprises a hinge portion configured to receive a swivel, such that the clutch assembly is hingedly attached to the enclosure and the enclosure is allowed to pivot about the swivel in a lateral direction. A method comprises providing an enclosure configured to receive a cord mechanism; disposing a clutch assembly having a hinge portion and a swivel at an end of the enclosure, and attaching a roller mechanism to the clutch assembly, wherein the clutch assembly is hingedly attached to the enclosure to allow the enclosure to pivot in a lateral direction.

Abstract: A vertically folding wall partition with a set of foldable panel assemblies serially and pivotally connected through a series of vertically spaced apart supports, and a moving mechanism varying a distance between opposed ends of each panel assembly following a downwardly progressing sequence starting with the uppermost panel assembly as the panel assemblies are moved from the deployed position to the folded position, and the moving mechanism varying the distance between the opposed ends of each panel assembly following an upwardly progressing sequence starting with the lowermost of the panel assemblies as the panel assemblies are moved from the folded position to the deployed position.

Abstract: A pulley assembly for an overhead counter weight door features a base plate and a support arrangement carried on and spaced from the base plate so that the base and support arrangements face toward one another. A shaft is carried on the base plate and the support arrangement to extend therebetween with a pulley supported on the shaft between the base plate and the support arrangement for rotation about an axis defined by the shaft. A plurality of wall sections extends between the base plate and the support arrangement to establish connection therebetween radially outward from the shaft beyond an outer periphery of the pulley on more than two sides thereof.

Abstract: A stacking panel covering for an architectural opening includes a headrail and a plurality of suspended from the headrail. The panels form an overlapped stack at one end of the headrail when the stacking panel covering is opened, and cover the architectural opening when the stacking panel covering is closed. The panels are piggybacked on those adjacent thereto, so that they stack, one behind the next, when the stacking panel covering is opened, and so that each pulls the next adjacent thereto as the stacking panel covering is being closed. The panels themselves may be planar, or convexly curved in a horizontal direction and substantially straight in a vertical direction.

Abstract: A vertically collapsible weather resistant barrier for an opening, having a plurality of side frames secured along the height of side walls and/or an intermediate post defining the opening. Each side frame has a longitudinal channel along its length facing inward toward the opening. The channel accommodates sheaves extending from the barrier and by which a ceiling mounted pulley system may house and lower the barrier with the side frame. The barrier comprises a plurality of pantograph structures at opposite ends of a plurality of panels. The arms of the pantograph structure closest to the side walls house a locking mechanism thereon facing the side frame at either end of the arm that engages a latch in and a proximate arm to pull them into tight vertical alignment when substantially fully extended. The locking mechanisms are covered by an expandable bulb seal that bulges outwardly when the locking mechanism is engaged to create a seal between the pantograph and the channel in the side wall.

Abstract: A limit mechanism for door machine for controlling the door curtain in such a manner that it stops accurately at an upper stop level and a lower stop level, the door machine including an output pulley driving a reel of the door curtain. The limit mechanism comprises: a screw rod both ends of which are rotatably supported on a frame, the end portion of one end of the screw rod being provided with a driven pulley which interlinks with the reel of the door curtain; a pair of nut blocks each having a threaded hole centrally arranged for joining with the screw rod so as to slide thereon; a pair of lock devices for locking relative positions between the pair of nut blocks; and a pair of buffer devices arranged respectively at both ends of the screw rod for limiting the sliding stroke of the nut blocks.

Abstract: Disclosed is a one cord blind that has a simplified structure enabling it to be easily manufactured, prevents a safety accident by not using a ball chain, makes an interior design neat and enables a roll screen to move upward and downward by a rotating cord or hands, so that the upward and downward operations can be easily made.

Abstract: A safety device for a window covering comprises a head rail and a shade panel extending from the head rail. A lift cord extends along one side of the shade panel between the head rail and the bottom of the shade panel. A safety cord extends between the head rail and the bottom edge of the shade panel where the safety cord comprises a plurality of loops. The lift cord extends through the plurality of loops. The safety cord is connected to the shade panel at fixed points between the top edge and the bottom edge to limit the distance the safety cord may be moved away from the shade panel. A safety device may also comprise a safety ribbon that is attached to the shade panel by a hook and loop connector that covers the lift cord.

Abstract: A torsion coil spring type counterbalance system for an upward acting door includes one or more sleeves disposed over or within the spring coils and engageable with a pre-determined number of spring coils during operation of the spring to modify the spring rate to more closely approximate the required counterbalance forces exertable on the door when the door moves between open and closed positions. The counterbalance system is particularly advantageous for upward acting sectional doors which have one or more sections which are heavier than the other sections, including an uppermost section which may be heavier due to the provision of windows or other structural features of the section.

Abstract: A stacking panel covering for an architectural opening includes a headrail and a plurality of suspended from the headrail. The panels form an overlapped stack at one end of the headrail when the stacking panel covering is opened, and cover the architectural opening when the stacking panel covering is closed. The panels are piggybacked on those adjacent thereto, so that they stack, one behind the next, when the stacking panel covering is opened, and so that each pulls the next adjacent thereto as the stacking panel covering is being closed. The panels themselves may be planar, or convexly curved in a horizontal direction and substantially straight in a vertical direction.

Abstract: A weight compensation device for a lifting door, includes a spring element and a tensile element, which can be wound onto or unwound from a winding device in such a way that the spring element achieves its greatest pre-tension when the door leaf is in the closed position and is essentially tension-free when the door leaf is in the open position. The tensile element is narrower at the end facing the winding device than at the end facing the spring element and the winding device includes a guide device, which is used to wind the tensile element in such a way that the wound layers lie adjacent to one another without making contact. To achieve this, the guide faces around the perimeter of the guide device have a continuously increasing radius in the winding direction. This enables the provision of a weight compensation device that achieves the torques required for effective weight compensation by means of a simple construction.

Abstract: An operator system for moving a barrier between limit positions, comprising an operator motor assembly mounted proximate to the barrier, at least a portion of said operator motor assembly movable depending upon an operating condition thereof; a counterbalance system adapted to be connected to the barrier, said counterbalance system coupled to said operator motor assembly to move the barrier; and an integral cable storage drum and transfer assembly connecting said operator motor assembly to said counterbalance system.

Abstract: An elevator door system includes a motor rotating a vertical reel, and an elevator door. The door can be formed of a plurality of vertically aligned rigid panels or can be a sheet of material which is rigid or reinforced in the vertical direction or can have any other appropriate form making it suitable for being wound upon and unwound from the reel. The door is mounted to a flexible force transmission member provided along an entire width of the door and interconnected to the reel. Accordingly, the forces generated by the motor for opening and closing the door are substantially transmitted through the transmission member rather than being imparted onto the door itself. Hence, in use the strain on the door is greatly reduced and therefore the quantity of material used for the door and consequently its cost and mass can be reduced without deteriorating performance.

Abstract: An overhead door with improved biasing means and automatic locking means includes two panels which are substantially horizontal when the door is raised and vertically aligned when the door is closed. An expandable hinge at the interface of the door panels allows the lower panel to move vertically when the door is in the lowered position with the upper end of the lower door panel is spaced from the lower end of the upper door panel. Either the lower end of the upper panel is tapered downwardly toward its outer edge, or the upper end of the lower panel is tapered upwardly toward its outer edge so that the outer edges of the panel ends contact first, biasing the interface of the panels outwardly, when the door is raised. The door also includes a latch that is engaged upon lowering the lower panel relative to the upper panel.

Abstract: A roman shade comprises an operation box section for rotating a rotation gear as a driving ball chain (25) is pulled down; a rotation shaft (40) fitted into the rotation gear; a frame surrounding the operation box and the rotation shaft (40) and secured to a wall or ceiling; and a ball chain box section including an inside gear which is fitted around the rotation shaft (40), a driven ball chain (22) which has balls to be engaged into grooves defined on the inside gear so that the driven ball chain (22) is moved vertically as the inside gear is rotated, and a ball chain box in which the driven ball chain (22) is compiled without being entangled.

Abstract: A cable-and-pulley mounted overhead door includes a mechanism for sensing when the cable is tending to slacken and to automatically take-up the slack so as to thereby prevent the cable from disengaging from its pulley. When the overhead door includes an automated drive system, provision is further made for sensing when the take up of slack has progressed to a determined degree and to responsively turn off the automated drive system.

Abstract: The invention relates to a device having a plurality of parallel lamellae and an actuating device. The lamellae can be brought together to form a packet and connected to a pivoting element for pivoting purposes. The pivoting element has a first end and a plurality of other ends which are respectively connected to a lamella. When a lamella is pulled, the lamellae are pivoted in a common plane by the pivoting element. Preferably, the lamellae are respectively pivotably mounted on the upper, essentially horizontal edge thereof.

Abstract: A counterbalance system for an upward acting door includes a cable drum support shaft and a torsion spring drive mechanism mounted adjacent one or both sides of the door and drivably connected to the drum support shaft. The spring drive mechanism includes a torsion coil spring mounted on a frame and connected to a vertically oriented shaft which, in turn, is connected to an output shaft by way of a bevel gear drive. A spring winder device is connected to one end of the spring and to the frame. Indicia on the spring is viewable through a window on the mechanism frame for indicating the number of revolutions imposed on the spring to set a predetermined counterbalance torque.

Abstract: A shutter system is disclosed which is unitized in a single rectangular frame or bracket with a window or door for use in a building opening that includes a plurality of shutter plates that can be folded and unfolded, each of the shutter plates having a hinged joint with adjoining shutter plates. The rectangular bracket has guide members with tracks for guiding the shutter plates using extensions with rollers from each of the hinged joints to cooperate with the guide members. There are also further extensions at the ends of the shutter plates on no less than every other plate, each of these securing wheel carriers at the end of the shutter plate and within a track in the rectangular bracket. The wheel carriers are equipped with a spring to put the secured shutter plate in tension because this adds additional strength to the shutter plates to resist bending and impact of the shutter system when in a fully deployed configuration.

Abstract: A door closing mechanism for pulling a door tight to a frame to which the door is mounted comprises a latch arm assembly having a latch arm pivotally secured to a panel of the door and pivotable between a first, open position and a second, latched position. An activating mechanism is operably connected to the latch arm assembly by a connecting apparatus and actuates the latch arm between its first and second positions. A latch member is secured to the jamb in which the door is mounted and is arranged and constructed so that when the latch arm is moved into its second, closed position, the latch arm engages the latch member and exerts force upon the latch member in a direction substantially normal to the plane of the door so as to cause the door to contact the door frame over substantially its entire height.

Abstract: An upwardly acting sectional door (24), including a plurality of panels (40), body portions (50) of the panels constructed of a flexible polymeric material and having a front surface (55), a cladding (80) covering the front surface of the body portions and having hooks (83, 84) at the upper and lower edges thereof, a hinge member (51) at an edge of the body portion operatively engaging the hooks of adjacent of the panels to provide relative pivotal motion between adjacent panels. Another embodiment is an upwardly acting sectional pan door (224) including, a plurality of panels (240), facers (250) of the panels defining a front surface of the door and having cooperatively engaging couplers (270) at the upper and lower edges thereof; stiles (280) at the ends of the facers receiving and attached to the facers, and hinge assemblies (290) located at the end stiles to provide relative pivotal motion between the stiles and the couplers of adjacent panels.

Abstract: A cable tensioner for an industrial door helps keep a cable neatly wrapped on its take-up drum. In some embodiments, the tensioner functions in a first mode during normal door operation, and operates in a second mode when the tension in the cable decreases to a predetermined low level. When operating in the second mode, the tensioner is able to take up slack in a cable that supports a door member, such as a door panel or a deadweight that counteracts the door panel's weight. The tensioner includes a shock absorber that resists a reaction force pulling on the tensioner when the tensioner is in the second mode. The tensioner may be adapted for use on various doors including, but not limited to, sectional doors, roll-up doors, high-lift doors, horizontally storing doors, vertically storing doors, and various combinations thereof.

Abstract: A bi-fold door is equipped with door lifting devices operated with a reversible electric motor drive to selectively open and close the door. The door lifting devices have winches operable to wind and unwind elongated webs connected at one end to rotatable members of the winches and anchored at the opposite end of the door. Anchors mounted on the door have adjustable sleeves operable to take up slack of the webs. The door moves at an increasing rate of speed from its closed to open positions and a decreasing rate of speed from its open to closed positions.

Abstract: A telescoping garage door assembly and door panel forming apparatus is described. The telescoping garage door assembly includes a plurality of interacting panels and means for moving the plurality of interacting panels. The panels include a first or top panel, at least one intermediate panel, and a last or bottom panel. The panels have corrugations and include brackets having flanges. The means for moving the plurality of panels includes a framework configured for supporting a plurality of guide rods and a drive mechanism. The flanges of the panels are configured to receive the guide rods. The drive mechanism includes two interconnected pulley systems with each pulley system including a pair of pulleys connected by a flexible member. The flexible members have lifting brackets configured for connecting with and moving the plurality of interacting panels on the guide rods between an open and a closed position.

Abstract: A drive for doors, in particular garage doors, having door runners which are in each case arranged laterally and which are guided in fixed position rails, and having a drive unit having at least a motor and a driving gear. The drive unit has two rope pulleys arranged to oppositely rotate, with the two free ends of a respective rope being wound on each rope pulley. The rope ends cooperate with the door runners such that the door can be opened or closed via the rotational movement of the rope pulleys.

Abstract: A single generally rectangular frame, with extruded guides on the lateral sides, which guides contain tracks for a retractable pleated shutter system, and similarly contain channels for the mounting of a window or a door. The shutter system utilizes extracted pleated plates of uniform cross-section. At the ends of the shutter panels, provision is made for a guide assembly which is secured internally of the tracks on the lateral sides of the frame. In one embodiment, means are provided for removing and replacing the shutter system and shutter panels, which does not require the removal of any cement, stucco, or any other permanent securing materials.

Abstract: An anti-stacking system for an operable wall includes a guide rail mounted on or adjacent to the track so that the guide rail is engaged by panel orienting members attached to the trolley bolt. The guide rail may be mounted on the track or to the track suspending brackets. In a preferred embodiment, the guide rail is integral with the track. Panel orienting members that engage the guide rails are mounted to the bolts of the trolleys, which bolts in turn are fixed rotationally to the panels. At designated areas in the room, the track is free of the guide rail to allow stacking of the wall panels when not in use. In wall forming areas, the panel orienting members engage the guide rails so as to cause the trolley bolts, and thus the panels, to be properly rotated into a proper wall-forming arrangement and to remain in the wall forming arrangement until moved to a storage area.

Abstract: A cable attachment bracket secured to the bottom panel of a multi-paneled garage door to prevent unwanted disconnection of a garage door counterbalancing mechanism from the garage door panel.

Abstract: A door closing mechanism for pulling a door tight to a frame to which the door is mounted comprises a latch arm assembly having a latch arm pivotally secured to a panel of the door and pivotable between a first, open position and a second, latched position. An activating mechanism is operably connected to the latch arm assembly by a connecting apparatus and actuates the latch arm between its first and second positions. A latch member is secured to the jamb in which the door is mounted and is arranged and constructed so that when the latch arm is moved into its second, closed position, the latch arm engages the latch member and exerts force upon the latch member in a direction substantially normal to the plane of the door so as to cause the door to contact the door frame over substantially its entire height.

Abstract: A pre-fabricated service bay used for providing service access to the underside of vehicles. The service bay is fabricated as a single monolithic unit and then positioned in an excavated hole within a service building. The service bay has multiple safety cover grids that are hydraulically activated to enclose the bay's opening when not in use. An access stairway is retractable within the bay during use with a deployable safety handrail that collapses upon stairway retraction.

Abstract: A cable tensioner for an industrial door helps keep a cable neatly wrapped on its take-up drum. In some embodiments, the tensioner functions in a first mode during normal door operation, and operates in a second mode when the tension in the cable decreases to a predetermined low level. When operating in the second mode, the tensioner is able to take up slack in a cable that supports a door member, such as a door panel or a deadweight that counteracts the door panel's weight. The tensioner may be adapted for use on various doors including, but not limited to, sectional doors, roll-up doors, high-lift doors, horizontally storing doors, vertically storing doors, and various combinations thereof.

Abstract: A joint is provided for unfolding systems, e.g. for satellite solar generators that permits sufficiently large unfolding torque, low weight and small dimensions. A drive on one joint half acts on a small pulley to wind a cord on it. The other end of the cord is tautly connected to a large pulley that rotates on the hinge pin and is fixed to the second joint half. The large pulley rotates in the opposite direction of the small pulley when the cord is wound so that the second joint half folds away from the first joint half on the hinge pin into an unfolded state and is held in this state by a stop against the tension of the cord. The joint is used, for example, for unfolding joints for satellite solar generators that consist of two joint halves, a hinge pin and a drive.

Abstract: Hardware designed to improve safety and minimize the risk involved in installing, maintaining, and operating sectional doors that use spring mechanisms to facilitate door movement. A lock-on side bearing bracket bears up a spring mechanism on a garage door. This side bearing bracket includes a hook and a perpendicular tab to prevent the spring mechanism from dangerously releasing its energy when parts supporting the spring mechanism are removed or fail. A lock-on bottom roller bracket having a bottom bearing plate and a safety hook similarly prevents a potential, dangerous release of energy when the garage door lift cable is in tension. A safety latch with a latch bar and a latch cover acts as a lock for the garage door. The use of multiple safety features makes the garage door systems of the present invention particularly safe to operate and maintain.

Abstract: A manual drive system for operating a protective covering for a building opening is disclosed and claimed. An access panel is also disclosed and claimed. The protective covering can be on the interior side or the exterior side of the building. An access panel can be located on the interior wall of the building near the opening or it can be located on the exterior wall of the building near the opening. The opening can be a window, bay, door or stall. The protective covering may be a windlocking curtain used in hurricanes. A guide having a retractable extension arm is mounted within the wall of the building. The retractable extension arm is pivotally attached to the access panel with a hinge. A first spring is operable between the guide and the retractable extension arm and a second spring is operable between the retractable extension arm and the access panel. A pulley and a pulley engaging device for operating the protective covering reside within the wall of the building.

Abstract: A cord spool for an architectural covering, such as a Venetian blind, having a rotatable central shaft for opening and closing the covering. The cord spool includes a circumferential surface, about which an operating cord can be wound that can be driven in opposite directions to open and close the covering. The spool is arranged so as to regulate or prevent an F(pull) gradient when pulling on one end of the operating cord to open the covering; and has a variable coupling connected to the central shaft and the circumferential surface for automatically actuating the regulating or preventing operation when the torque on the central shaft, exerted by the window covering, is greater than the torque on the circumferential surface, exerted by the operating cord as it is being pulled to open the covering.

Abstract: A cable failure device for a mobilizing a garage door in the event of a failure of one of the cables or one of the elements holding the cables is described. The cable failure device of the invention includes a support structure mounted on the cable operated door and includes a connection point onto which a tensioned cable is connected. A braking assembly is mounted onto the support structure and includes a casing mounted onto the support structure and a brake operable between a rest position and an operable position. The brake is movably mounted to the support structure and is located adjacent the outside of a fixed frame such as guide rails and is adapted to co-operate with a roller on the garage door so that a portion of the guide rail lies between the roller and the brake. A tension detector co-operating with the tension cable is provided for detecting a tension in the tension cable and an actuator is operatively connected to the tension detector and to the brake.

Abstract: A vertically foldable wall partition comprises a plurality of panels mounted to a number of horizontally spaced-apart vertically foldable skeleton framework. Each skeleton framework includes a number of pivotally interconnected arms which are adapted to be successively folded in a predetermined sequence. The sequential folding is controlled by a lifting mechanism. The vertically foldable wall partition further includes a universal sealing member which can be either used as an end seal or as a hinge seal.

Abstract: Bottom edge brackets for an upward acting door each include a base part including fastener receiving bores for securing the brackets to the bottom edge of the door, a flange projecting substantially normal to the base part including a connecting lug mounted for connection to a becket or loop of a door lifting cable and an integral rolled tubular guide roller support portion for supporting the shaft of a door guide roller. Each of the brackets also includes a hook portion projecting from the base part and adapted to be received in an opening formed in the bottom edge of the door for retaining the brackets connected to the door when door lifting forces are being applied thereto if one or more fasteners is loose or removed from the bracket.

Abstract: A bi-fold door is equipped with door lifting devices operated with an electric motor drive to selectively open and close the door. The door lifting devices have winches operable to wind and unwind elongated webs connected at one end to rotatable members of the winches and anchored at the opposite end to the door. Anchors mounted on the door have adjustable sleeves operable to adjust the working lengths of the webs.