Pneumatic openers are extremely versatile and can be used for both interior and exterior automatic doors. Subject-matter Index (made from Titles Only) of Patents of Invention: From March 2, 1617 (14 James I. Concealed, jamb-mounted type door closers, mounted in morticed recesses in the door and door frame, are concealed when the door is closed.

Door closer - Wikipedia Door closer - Wikipedia

Eugene Blount, Francis Richards and Joseph Bardsley also played important parts in the development, improvement and commercialization of door closers along with other companies, including Yale, Norton, Rixson and The Shelby Spring Hinge Company. They are ideal for multi-door applications because the cost per door leaf decreases significantly as the number of door leaves increase. The first patent for a pneumatic device to prevent the sudden slamming of a door was given to William Bullock and James Boaz, on May 13, 1813 (Patent Number 3695). If you need advice on which fire-rated door closer is right for you or any fire door closers product, please do get in touch. 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 consist of a pivot which protrudes from the top of the device and mates to a shoe (or strap) that the door is connected to, some kind of spring and a damping device to control the rate at which the door closes (very early ones had no damping), these damping devices are either pneumatic (known as an air spring or air check) or hydraulic in nature. In non-residential settings, door closers are most commonly installed on bathroom doors, fire doors, and exit doors.

Mannesmann M41115 Pneumatic Door Closer in White Mannesmann M41115 Pneumatic Door Closer in White

C. Norton started his business in 1877, entering the door closer market in 1880 with a door check for the Boston Trinity Church.When installing a fire door closer , it is important to follow the correct steps and refer to the manufacturer’s instructions. Floor springs are usually the most expensive and most hard wearing of all the door closing devices in use.