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. Vallancey, Charles (1812). Account of the Ancient Stone Amphitheatre Lately Discovered in the County of Kerry: With Fragments of Irish History Relating Thereto. Graisberry and Campbell. p.33. https://www.britishnewspaperarchive.co.uk/viewer/bl/0000254/17381221/006/0003– via British Newspaper Archive. {{ cite news}}: Missing or empty |title= ( help) 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).

Pneumatic - Door Closers - Door Accessories - The Home Depot Pneumatic - Door Closers - Door Accessories - The Home Depot

Fielding, Henry; Battestin, Martin C. (1989). New essays by Henry Fielding. p.251. ISBN 9780813912219. 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) Woodcroft, Bennet (1854). Titles of Patents of Invention, Chronologically Arranged: From March 2, 1617 (14 James I.) to October 1, 1852 (16 Victoriae). 1617–1823. The Queen's Printing Office. Since the 1970s/1980s Dorma and GEZE have pushed to dominate the door closer business, with Ingersol Rand, ASSA ABLOY, RIXSON having large portions of the American market.Lloyd, G. E. R. (1973). Greek science after Aristotle. New York: Norton. ISBN 0393043711. OCLC 514642. 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. A self-closing hinge combines door closers and spring hinges with an optional hold open feature into one component. These closer hinges eliminate the visual and physical clutter of using additional devices, as well as reduce maintenance problems associated with overhead and in-floor door closers. They are especially useful where other types of closers are difficult to use. The most durable self-closing hinge can handle doors up to 440 lb.

Pneumatic Door Openers | Automatic Access Ltd

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. 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? 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.Pneumatic openers are extremely versatile and can be used for both interior and exterior automatic doors. They are ideal for multi-door applications because the cost per door leaf decreases significantly as the number of door leaves increase. A single control box may power up to two pairs of doors simultaneously and this flexibility results in significant savings in material and installation costs. Finally, because pneumatic openers use air instead of electronics, they can be employed in hazardous situations. Unlike electrical actuators there is no high-voltage wiring at the door frame, and the control box, which contains the electrical timing circuits, can be remotely located outside the hazardous area. Electric door closers may also be hooked to a building’s fire alarm system. A triggered alarm cuts power to any electromagnetic hold-open device, allowing the doors to close. [30] Configurations [ edit ] A concealed jamb-mounted door closer 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. Controlled closers” use adjustable hydraulic valves to variously regulate the door’s opening and closing speed, latch speed, and delayed action return. These allow setting of the “sweep speed” (the rate which the door travels along the majority of its closure, the sole closing setting on basic closers); the “latch speed” (the rate in the last 10 to 15 degrees of closing arc, allowing it to be set faster than the "sweep" to ensure proper latch closure); “delayed action” (which slows sweep speed dramatically for roughly the first half of its range, allowing more time for passage), [27] and opening speed (preventing a door from being opened too fast, a useful feature in crowded environments, and those where the young, old, or infirm may be present). It is also particularly well-suited to exterior doors where there is a danger of wind catching and blowing them open, potentially harming the door, nearby objects, people, or pets.

Door closer - Wikipedia Door closer - Wikipedia

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.In buildings that require noise control (Studios) door closers play an important part in the suppression of unwanted noise both in and out rooms and the buildings themselves. The energy used in opening the door is stored in a spring (compression, torsion, tension, volute or leaf), [25] and released to close the door. Spring tension is typically adjustable, altering both opening and closing force. Most door closers use oil-filled hydraulic dampers to limit closing speed, and allow for soft closing. Other types use a friction-based mechanical speed control mechanism. [26] Cote, Arthur E. (2003). Operation of Fire Protection Systems. Jones & Bartlett Learning. p.50. ISBN 9780877655848.