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Roll shutters on windows. Security roller shutters in a dead mall. A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open ...
When the camera's shutter is not in sync with the NTSC monitor, thick, dark horizontal bands or bars will appear and drift across the screen. These are called "roll bars". A sync box with phase control is used to eliminate the roll bars. [2] Shooting at 24 fps with a 144° camera shutter will reduce the size of the roll bars to very thin lines.
Operable louvered shutters have louvers (or louvres in British usage), or slats, controlled by a tilt bar or rod to adjust the louver position and keep them in a uniform position, to control light, visibility and airflow. Shutters with operable louvers are described variously as traditional shutters, California shutters, or plantation shutters.
A PA-302 General Precision Laboratories (GPL) kinescope (c.1950–1955). Its movie film camera, bolted to the top of the cabinet, used Kodak optics.. Kinescope / ˈ k ɪ n ɪ s k oʊ p /, shortened to kine / ˈ k ɪ n iː /, also known as telerecording in Britain, is a recording of a television program on motion picture film directly through a lens focused on the screen of a video monitor.
Spring sails were invented by Scottish millwright Andrew Meikle in 1772. The sail is divided into a number of bays, each having a number of shutters. All the shutters are joined together by a shutter bar, and the force required for the wind to open the shutters is adjusted by a separate spring on each sail.
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Openable bars have been introduced to the market. [1] In Britain, in the middle of the 1800s, glass started to be used in the ordinary shops, but wooden shutters were retained to protect the goods exposed. At about this time, metal grilles started to be used at night to allow passersby to view the goods on display.
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