Editing Alps ultra low profile

{{infobox dswitch
| image name        = Alps ultra low profile.jpg
| manufacturer      = [[Alps Electric]]
| inventor          = 
| switch type       = Clicky
| contact mechanism = [[Contact mechanism#Metal leaf|Metal leaf]]
| product code      = 
| family            = 
| keycap mount      = Unique
| switch mount      = [[Switch mount#PCB mount|PCB mount]]
| lifetime          = 
| force graph       = 
| peak force        = 
}}

'''Alps ultra low profile''' refers to a rare low-profile PCB mount switch from Alps.<ref name="Sandy" /> The switch uses a snap-on [[keycap mount]] similar to [[Hi-Tek Series 725]] switches to achieve an even lower profile than [[Alps low profile]] switches. The switch emits a quiet click when depressed. The switch branding is found on the top of the slider assembly.

==Construction==
The switch is formed of two separate assemblies. The base contains the separated contact plates and actuation spring and is soldered to the PCB. Onto this is placed a self-contained slider assembly, containing a base, a flat-topped slider, and an internal [[return spring]] separate from the actuation spring. The exact number of parts is not known, as the switch has not been fully disassembled.

When force is applied to the slider, the central flat-topped piece and the enclosing shaft telescope into the base.

==Keyboards==
*Unidentified [[NTC]] laptop keyboard from 1992<ref name="Sandy" />

==Gallery==
<gallery widths=250 heights=187>
File:Alps ultra low profile.jpg                                        | Alps ultra low profile switch
File:Alps ultra low profile -- slider assembly.jpg                     | Flat-top slider with Alps logo, which snaps onto the switch base
File:Alps ultra low profile -- keycap mount.jpg                        | Flat keycap mount to match the slider
File:Alps ultra low profile -- assembled vs opened.jpg                 | Assembled (left), and slider assembly removed (right)
File:Alps ultra low profile -- detached slider assembly.jpg            | Slider assembly
File:Alps ultra low profile -- base assembly complete.jpg              | Base assembly
File:Alps ultra low profile -- base assembly.jpg                       | Base assembly with actuation spring removed
File:Alps ultra low profile -- actuation spring.jpg                    | Actuation spring
File:Alps ultra low profile -- inverted slider assembly, released.jpg  | Inverted slider assembly
File:Alps ultra low profile -- inverted slider assembly, depressed.jpg | Slider assembly depressed
</gallery>

==References==
<references>
<ref name="Sandy">Sandy — [http://sandy55.fc2web.com/keyboard/alps_ultra_lowpro_e.html ALPS Ultra Low Profile switch]</ref>
</references>

[[Category:Alps switches]]
[[Category:Metal contact switches]]
[[Category:Low travel switches]]
[[Category:Clicky switches]]
[[Category:List of all keyboard switches]]