Editing
Alps SKFF series
From Deskthority Wiki
Jump to navigation
Jump to search
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
{{stub}} {{TODO photo}} {{infobox dswitch | image name = Alps_Skff.jpg | manufacturer = [[Alps Electric]] | inventor = Katsuyuki Matsuo | switch type = [[Clicky]] | contact mechanism = [[Metal leaf]] | lifetime = | peak force = | keycap mount = Generic cruciform | patents = [http://www.google.com/patents/US4186290 US4186290] (1978)<br>[http://www.google.com/patents/US4249055 US4249055] (1979) }} '''Alps SKFF series''', or '''Alps vertical plate spring''', is a switch that shares characteristics of both [[Alps SKCP series]] and [[Alps SKCC series]]. It is designed from the outset to support [[double action]]. ==Nomenclature== The Canon AP400 typewriter in which it was discovered bears the [[Alps keyboard codes]] 12KF006C and KFFBA010; from this, (S)KFF was deduced. The [[Apple III]] service manual was subsequently found to cite these switches as "KFF". However, they remain listed here as SKFF until Alps's apparent inconsistent naming is better understood. ==Description== Alps vertical plate spring switches differ from plate spring by having the plate spring assembly mounted vertically down the side of the switch. This change results in the switch being significantly more complicated than the original plate spring switch. The repositioning of the plate spring assembly allows for two separate plate spring assemblies to be fitted side by side, with a staged actuation to provide a double action response to the host. The switch is clicky, and the click sound created by inversion of the plate spring is specifically mentioned in both US patents. The ziggurat design of the [[slider]] is very similar to that of the [[Alps SKCC series]] switch. The switch exists in single action and double action variants, and supports a spring-mounted LED just as with SKCC series. Typically, the keystem is a small and cruciform. It has also been found with a tall, angled bar keystem assumed to be compatible with that of [[Alps SKCC Side-Angled Cream]], both of which are from Swedish-made Facit typewriters. ==Variants== {| class="wikitable variants-table" ! !!Type!!Notes |- |[[File:Alps_Skff.jpg|175px]]||[[Alps SKFF White]]|| |- |[[File:No photograph.svg|175px]]||[[Alps SKFF LED]]|| |- |[[File:No photograph.svg|175px]]||[[Alps SKFF Bar Angled White]]|| |- |[[File:Alps skff doubleaction black.png|175px]]||[[Alps SKFF Double Action Black]]||Second stage spring is external |- |[[File:No photograph.svg|175px]]||[[Alps SKFF Double Action White]]||Second stage spring assumed to be internal |} ==Keyboards== *[[Apple III]] keyboards (double-action white and black) ==Typewriters / Word Processors== *Some [[Canon typewriters | Canon AP400 typewriters]] (momentary, double-action black, illuminated; 1982 example)<ref name="DT-AP400" /> *Facit 1880 (bar angled white) *Facit 8111-2 (bar angled white; cross mount illuminated)<ref name="DT-Facit" /> *Sharp ZX-400 (white; some illuminated, double-action black on spacebar, enter, backspace and other keys) *Sharp ZX-510 (white; some illuminated, double-action black on spacebar) *Silver Reed EX 77<ref name="silver"/> ==References== <references> <ref name="DT-AP400">Deskthority β [http://deskthority.net/photos-videos-f8/canon-ap400-t6707.html Canon AP400]</ref> <ref name="DT-Facit">Deskthority β [https://deskthority.net/photos-videos-f64/facit-8111-2-typewriter-t12424.html Facit 8111-2 Typewriter]</ref> <ref name="silver">YouTube [https://www.youtube.com/watch?v=99J-_DDWZjA&ab_channel=junebugvintage Alps SKFF / Vertical Plate Spring Switch Sound Test | Silver Reed EX 77 Typewriter | ASMR] Uploaded 01-17-2022.</ref> </references> [[Category:Alps switches]] [[Category:Clicky switches]] [[Category:Illuminated switches]] [[Category:Metal contact switches]] [[Category:Double action switches]] [[Category:List of all keyboard switches]]
Summary:
Please note that all contributions to Deskthority Wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see
Project:Copyrights
for details).
Do not submit copyrighted work without permission!
Cancel
Editing help
(opens in new window)
Templates used on this page:
Template:Dbanner
(
edit
)
Template:Infobox
(
edit
)
Template:Infobox/image
(
edit
)
Template:Infobox/row
(
edit
)
Template:Infobox dswitch
(
edit
)
Template:Stub
(
edit
)
Template:TODO photo
(
edit
)
Template:Theme colour
(
edit
)
Navigation menu
Page actions
Page
Discussion
Read
Edit
Edit source
History
Page actions
Page
Discussion
More
Tools
Personal tools
Not logged in
Talk
Contributions
Create account
Log in
Navigation
Main page
Deskthority forum
Support Deskthority
Search
Main categories
Guides
Keyboards
Keyboard switches
Keycaps
Keyboard modding
Pointing devices
Brands & companies
Group buys
Other topics
Wiki info & links
Recent changes
Random page
All pages
Deskthority wiki help
MediaWiki help
Tools
What links here
Related changes
Special pages
Page information