Editing Fujitsu Peerless

{{infobox dswitch
| image name        = Fujitsu Peerless type 2 LED -- recognition.jpg
| manufacturer      = [[Fujitsu]]
| product code      = 
| sense method      = [[Membrane]]
| switch type       = 
| actuation force   = 
| introduced        = 
| family            = 
| keycap mount      = Multiple
| travel            = Ca. 3.6 mm
}}

'''Fujitsu Peerless''' is a clicky [[spring over dome]] switch.

==Description==
Fujitsu Peerless switches use a curious mechanism to achieve clicks from a dome switch. A plastic cylinder is placed on top of the dome; the cylinder is closed at the bottom, and open at the top. A helical spring is placed into the cylinder; the spring is approximately twice the height of the cylinder's internal capacity. A slider then presses down onto the spring. The mechanism by which the click is achieved is unclear, and may come from the shockwave caused by the dome collapsing under pressure from the cylinder. The click is quiet compared to more common switches, making it fairly well suited to a modern office space; the overall sound level is much less than plate-mounted tactile keyboards.

Full travel is around 3.6 mm, with actuation (pretravel) at around 2.8 mm. The click coincides with switch actuation.

The switch feel is fairly similar to [[IBM membrane buckling spring]], but with greater resistance and a comparatively rough feel. A Model M keyboard feels softer and much smoother in comparison.

Type 2 Peerless keycaps support two, or possibly three different [[keycap mount]]s. Most keycaps use a snap-on mount similar to [[IBM Model M]] keycaps, with a very small degree of keycap compatibility with Model M keycaps; unlike with the Model M, though, keycaps are a very tight fit and do not come off readily, and using a [[keycap puller]] will pull the slider out. Larger keycaps use a peg-and-slot mount very similar to [[keycap mount#Alps mount|Alps mount]] but with a larger slot. Both mount types are supported by the same slider design, and some larger keys use both mounts simultaneously. On either side of the slot, are two smaller slits which suggest that, potentially, that could be another keycap mounting option.

==Keyboards==
*[[ICL 16022/046]] (Type 1)<ref name="ICL" />
*[[Fujitsu FKB4700]] (Type 2)

==Gallery==
===Type 1===
Type 1 appears to be the older design.<ref>geekhack — [http://geekhack.org/index.php?topic=40142.0 WTB fujitsu libertouch ANSI]</ref>

<gallery widths=250 heights=187>
File:Icl 16022-046 -- switch with keycap removed.jpg       | Keycap removed from the slider (ICL 16022-046)
File:Icl 16022-046 -- switch with slider removed.jpg       | Slider removed from the switch
File:Icl 16022-046 -- switch with spring removed.jpg       | Spring removed from the switch
</gallery>

===Type 2===
This is the most common design. It is not clear whether the keycaps of type 2 are compatible with those of type 1.

<gallery widths=250 heights=187>
File:Fujitsu FKB4700-152 -- switch with keycap removed.jpg | Keycap removed from the slider ([[Fujitsu FKB4700]], [[LED]]-variant switch)
File:Fujitsu FKB4700-152 -- switch with slider removed.jpg | Slider removed from the switch, but with the keycap still affixed
File:Fujitsu FKB4700-152 -- switch with spring removed.jpg | Spring removed from the switch
File:Fujitsu Peerless -- assembly.jpg                      | Peerless switch assembly
File:Fujitsu Peerless -- disassembled.jpg                  | Disassembled Peerless switch
File:Fujitsu FKB4700-152 -- sliders.jpg                    | Sliders in place in the slider plate
File:Fujitsu FKB4700-152 -- components, close-up.jpg       | Switch and keyboard components
File:Fujitsu FKB4700-152 -- membranes and domes.jpg        | Domes over membrane sheets
File:Fujitsu FKB4700-152 -- peg-and-slot-mount keycap.jpg  | Peg-and-slot slider and keycap from a Fujitsu FKB4700
File:Fujitsu FKB4700-152 -- snap-on keycap.jpg             | Snap-on keycap from the same keyboard
File:Fujitsu FKB4700-152 -- stabilised keycaps.jpg         | Stabilised keycaps using both mounts simultaneously
</gallery>

==External links==
*YouTube — [http://www.youtube.com/watch?v=Gi5gnlovnm0 ICL 16022/046 (reloaded)]

==References==
<references>
<ref name="ICL">utensilia.tk — [http://utensilia.tk/urzadzenia/icl_16022-046_reloaded.html ICL 16022/046 (reloaded)]</ref>
</references>

[[Category:Fujitsu switches]]
[[Category:Clicky switches]]
[[Category:Membrane switches]]
[[Category:Spring over dome switches]]
[[Category:List of all keyboard switches]]