A tilt window having sash with an internal screen that deploys when the sash is opened and retracted when the sash is closed with a cleaning mechanism in the form of a brush lined slot engaging the screen as it moves into and out of the sash receptacle.

An electrochromic device comprising: an active electrochromic layer having optical properties that vary based on an electrical voltage applied to the active electrochromic layer; an integrated energy source integrated within the electrochromic device for generating or storing electrical energy; and a controller operatively coupled to the energy source and the active electrochromic layer for applying the electrical energy generated or stored by the integrated energy source to the active electrochromic layer to achieve the optical properties desired by a user. The described electrochromic device is entirely self-contained and internally produces all the electrical energy necessary for its operation and specifically for the operation of the controller and for controlling the optical properties of the electrochromic layer. In other words, there no external wiring or any kind is required for supplying electric energy to the electrochromic device.

An electrochromic device comprising: an active electrochromic layer having optical properties that vary based on an electrical voltage applied to the active electrochromic layer; an integrated energy source integrated within the electrochromic device for generating or storing electrical energy; and a controller operatively coupled to the energy source and the active electrochromic layer for applying the electrical energy generated or stored by the integrated energy source to the active electrochromic layer to achieve the optical properties desired by a user. The described electrochromic device is entirely self-contained and internally produces all the electrical energy necessary for its operation and specifically for the operation of the controller and for controlling the optical properties of the electrochromic layer. In other words, there no external wiring or any kind is required for supplying electric energy to the electrochromic device.

A movable wall element for a building with a floor and a ceiling is disclosed, where the movable wall element comprises at least one lower roller device comprising a wheel element which is capable of engaging the floor of the building when the wall element is to be moved across the floor. The movable wall element further comprises at least one upper roller device comprising a wheel element which is capable of engaging the ceiling of the building when the wall element is to be moved across the floor.

A dual curtain closure system for covering a portal wherein each curtain (18, 38) has a length greater than the length of the lateral margins (12, 13) of the portal (11), a first end (19, 39) fixedly attached across the portal at an upper end thereof, and a second end (23, 43) folded back on itself to define an upwardly opening pocket (25, 45). An elongated rod (34, 35) is supported within each pocket. A first spindle (51) winds and unwinds the first curtain (18) and a second spindle (52) winds and unwinds the second curtain (38). A drive motor (55) is operable to simultaneously rotate the first and second spindles such that the upwardly opening pockets of the curtains are concomitantly raised or lowered. A predetermined distance between the rods is maintained as the pockets are raised or lowered, which facilitates sealing of the curtains to the lateral margins of the portal as the curtains are lowered.

A dual curtain closure system for covering a portal wherein each curtain (18, 38) has a length greater than the length of the lateral margins (12, 13) of the portal (11), a first end (19, 39) fixedly attached across the portal at an upper end thereof, and a second end (23, 43) folded back on itself to define an upwardly opening pocket (25, 45). An elongated rod (34, 35) is supported within each pocket. A first spindle (51) winds and unwinds the first curtain (18) and a second spindle (52) winds and unwinds the second curtain (38). A drive motor (55) is operable to simultaneously rotate the first and second spindles such that the upwardly opening pockets of the curtains are concomitantly raised or lowered. A predetermined distance between the rods is maintained as the pockets are raised or lowered, which facilitates sealing of the curtains to the lateral margins of the portal as the curtains are lowered.

A spring winding type window shade includes a headrail providing a first fastening device, a curtain having a second fastening device located at one end thereof and fastened to the first fastening device of the headrail, scroll springs longitudinally and tightly bonded to the curtain with respective one ends thereof fastened to the second fastening device of the curtain, and a clamp for clamping the respective opposite ends of the curtain and scroll springs remote from the headrail so that the curtain and the scroll springs can be received in an accommodation space in the clamp in a rolled up condition. When pressing a press portion of the clamp, the clamp is opened, allowing the curtain to be rolled up or extended out with the scroll springs. When release the applied pressure from the press portion, the clamp automatically clamps the curtain and the scroll springs again.

A retractable curtain system is provided and includes a curtain support system, a curtain, and a retraction system. The curtain support system includes a pair of outer walls and an upper frame to provide a curtain receiving space. The curtain covers the curtain receiving space and includes a first non-transparent panel and transparent panel connected to the first non-transparent panel. The retraction system is connected to the curtain to lower and raise the transparent panel.

A retractable curtain system is provided and includes a curtain support system, a curtain, and a retraction system. The curtain support system includes a pair of outer walls and an upper frame to provide a curtain receiving space. The curtain covers the curtain receiving space and includes a first non-transparent panel and transparent panel connected to the first non-transparent panel. The retraction system is connected to the curtain to lower and raise the transparent panel.

The invention relates to a door opening and closing structure including a door plate, a transverse bar, a zipper and a pulling string. When a tension is applied on the pulling string and the tension is greater than a gravity of the transverse bar and at least a portion of the door plate, and the at least a portion of the door plate is driven by the transverse bar to move along the extension direction to form an opening. When the tension is less than the gravity of the transverse bar and the at least a portion of the door plate, the door plate is driven by the transverse bar to move along the gravity direction to reduce the opening.