What sets pneumatic door openers apart from other automatic door openers is that they use air pressure instead of electronics to produce the energy to move a door. This has a number of highly useful applications which means that Automatic Access can provide solutions for pretty much any context where an automatic door is required. Cote, Arthur E. (2003). Operation of Fire Protection Systems. Jones & Bartlett Learning. p.50. ISBN 9780877655848. When door closers are mounted in the header they are known as transom closers. [33] These can be HO (hold open) or NHO (none hold open). Essentially, pneumatic door openers utilize the power of air under pressure to automatically open a door. The pneumatic system is built around a standard closer so the door will operate manually at all times, opening automatically on activation of a switch, access control system, etc. In what situations do Automatic Access use pneumatic door openers?

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Lloyd, G. E. R. (1973). Greek science after Aristotle. New York: Norton. ISBN 0393043711. OCLC 514642. The shoe door closer, known as a heel spring, [35] is housed entirely in the 'heel' of the door, inside a shoe. This shoe looks very much like the shoe used in conjunction with floor springs. Fielding, Henry; Battestin, Martin C. (1989). New essays by Henry Fielding. p.251. ISBN 9780813912219.

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Spring hinge uses a spring mounted in a hinge and is integral to its design. The spring can be either visible or hidden within a tube and can be found more commonly on interior doors. When used on doors that open both ways they are known as double action spring hinges. Types [ edit ] Manual [ edit ] Older manual door closer (made by BKS) Friction-based mechanical speed control mechanism A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. A catalogue of the machines, models, and other articles, in the repository of the society instituted for the encouragement of the arts, manufactures, and commerce. Society for the Encouragement of Arts, Manufactures, and Commerce (Great Britain), Society of Arts (Great Britain). R. Wilks. 1814. p.18. {{ cite book}}: CS1 maint: others ( link) Pneumatic door openers convert energy (typically air) into mechanical motion and are used in a similar way to automatic door actuators. They combine at least one door operator with a control unit and an air compressor.

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Tobias, Scott (2015-04-13). Illustrated Guide to Door Hardware: Design, Specification, Selection. John Wiley & Sons. p.323. ISBN 9781118112618. Woodcroft, Bennet (1854). Subject-matter Index (made from Titles Only) of Patents of Invention: From March 2, 1617 (14 James I.) to October 1, 1852 (16 Victoriae). A to M. The Queen's Printing Office. p.128. Door closers are widely used in both residential and non-residential settings. At home, they are most commonly found on screen and storm doors. They are also used in numerous applications in commercial, industrial, institutional, and public facilities from libraries and schools to museums and airports. Manual Door Closer Injury and How door closers work". www.constructionwitness.com . Retrieved 2019-04-06. Door closers also play a role in maintaining desired interior temperatures, reducing air movement in and out of conditioned space.

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Find sources: "Door closer"– news · newspapers · books · scholar · JSTOR ( August 2010) ( Learn how and when to remove this template message) Another type of surface mounted door closer is attached to the door frame behind the door (where the hinges are) next to the middle hinge. The "arm" (tail) rests against the door, and a spring that is twisted by the user opening the door closes the door by returning to its pre-twisted shape. This type of door closer is referred to as a "tail" spring [32] and is one of the more simple mechanisms, having no damping control. repository, Gill's scientific, technological and microscopic (1829). Gill's technological [afterw.] Gill's scientific, technological & microscopic repository; or, Discoveries and improvements in the useful arts, a continuation of his Technical repository, by T. Gill. pp.230–231. {{ cite book}}: CS1 maint: multiple names: authors list ( link)