Editing RAFI RS 74 M (section)

==Description==
RS 74 M switches share the same overall design as the 4 mm [[RAFI RS 76 M]] switch, but have a reduced travel of 2.5 mm. They are targeted at a [[unit]] of 0.75", or 19.05 mm, and the switch shells are themselves this exact width.

The switch uses a square loop of sprung metal that is kept away from a metal contact by the slider. When the slider is depressed, the metal loop lowers until it reaches the static contact. The switch has two solder points, and the slider recess appears to form the single PCB fixing pin. Actuation is at 1.5±0.5 mm; the lug on the slider which raises the loop travels further than the loop drops.

The sprung loop and the static contact both feature [[gold crosspoint]] contacts, as with most [[Cherry]] switches.

The switches are available in several forms: linear, linear (illuminated), latching, and latching (illuminated). So-called "illuminated" switches simply have room for an [[LED]] in the top-right corner; they are not intended to provide backlit keycaps.

RS 74 M was patented together with RS 74 C in [https://google.com/patents/DE2504091A German patent DE2504091A], filed in 1975.

According to RAFI, RS 74 M was discontinued in July 2005.<ref>Conversation with RAFI, July 2013</ref>