Editing Slip ring (section)

== Composition ==

Typically, a slip ring consists of a stationary graphite or metal contact (brush) which rubs on the outside diameter of a rotating metal ring. As the metal ring turns, the electric current or signal is conducted through the stationary brush to the metal ring making the connection. Additional ring/brush assemblies are stacked along the rotating axis if more than one electrical circuit is needed. Either the [[brush (electric)|brushes]] or the rings are stationary and the other component rotates.<ref>{{cite web |url=http://www.cobham.com/about-cobham/aerospace-and-security/about-us/aerospace-communications/annemasse.aspx |title=Cobham plc :: Aerospace and Security, Aerospace Communications, Annemasse |publisher=Cobham.com |date=2011-02-13 |access-date=2011-09-02 |archive-date=2013-05-27 |archive-url=https://web.archive.org/web/20130527152222/http://www.cobham.com/about-cobham/aerospace-and-security/about-us/aerospace-communications/annemasse.aspx |url-status=dead }}</ref><ref>{{cite web|url=http://www.uea-inc.com/products/slip-rings/how-they-work.aspx |title=how slip rings work |publisher=Uea-inc.com |access-date=2011-09-02}}</ref>
This simple design has been used for decades as a rudimentary method of passing current into a rotating device.