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  2. Vision panel - Wikipedia

    en.wikipedia.org/wiki/Vision_panel

    A vision panel is a small window in a door which allows people to look through without opening the door. Vision panels are sometimes in walls, generally adjacent to a door. These have implications in safety, primarily to avoid opening doors on a person coming the other way, but also in case of fire to avoid opening a door onto a fire. They ...

  3. Door security - Wikipedia

    en.wikipedia.org/wiki/Door_security

    Door viewers — small fish-eye lenses that allow residents to view outside without opening the door. Door windows — there are three common methods to add security to windows in or beside doors: security bars and grates, security films (coatings applied to the glass in windows to reinforce it), or breakage resistant windows (plexiglas, lexan ...

  4. GE Security - Wikipedia

    en.wikipedia.org/wiki/GE_Security

    GE Security was a division of General Electric's GE Enterprise Solutions.It was acquired by UTC on March 1, 2010, and became part of UTC Fire & Security. [1] GE Security's division provides intrusion alarm systems, integrated security systems, fire systems, access control, video surveillance, explosives and illegal drug detection, key control/lockbox, fiber optic transmission, machine guarding ...

  5. Insulated glazing - Wikipedia

    en.wikipedia.org/wiki/Insulated_glazing

    Surface #1 is facing outside, surface #2 is the inside surface of the exterior pane, surface #3 is the outside surface of the interior pane, and surface #4 is the inside surface of interior pane. The window frame is labelled #5, a spacer is indicated as #6, seals are shown in red (#7), the internal reveal is on the right hand side (#8) and the ...

  6. Door - Wikipedia

    en.wikipedia.org/wiki/Door

    It is a door with lites where all or some panels would be in a casement door. A French door traditionally has a moulded panel at the bottom of the door. It is called a French window when used in a pair as double-leaved doors with large glass panels in each door leaf, and in which the doors may swing out (typically) as well as in.

  7. Frame and panel - Wikipedia

    en.wikipedia.org/wiki/Frame_and_panel

    Wood will expand and contract across the grain, and a wide panel made of solid wood could change width by a half of an inch, warping the door frame. By allowing the wood panel to float, it can expand and contract without damaging the door. A typical panel would be cut to allow 1/4" (5 mm) between itself and the bottom of the groove in the frame.