IDENTIFY THE KEYSWITCH thread

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snacksthecat
✶✶✶✶

16 May 2019, 20:26

xxhellfirexx wrote:
16 May 2019, 08:29
snacksthecat wrote:
16 May 2019, 01:20
Sorry if it's obvious -- What is this key switch?

It's linear and very very smooth. When I took the keyboard out of the box and tried it out I assumed it was Fujitsu leaf springs but I thought those were discrete switches. This is a membrane keyboard so now I'm confused.
Isn't the other Fujitsu keyboard you purchased membrane as well?

viewtopic.php?t=18272
Well that's embarrassing :P

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Polecat

19 May 2019, 03:25

I was digging through my storage and found this. The switches are MX mount, sort of, with a vertical blade on the stem and small horizontal cross extensions. There is no upper housing. Yes, the contacts are completely exposed. What the heck are these switches? They feel awful, just curious as to what they are?
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Hak Foo

19 May 2019, 05:32

Cherry M8 open mechanism?

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Polecat

19 May 2019, 05:45

Hak Foo wrote:
19 May 2019, 05:32
Cherry M8 open mechanism?
That's it, thank you!

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User101

04 Jun 2019, 14:57

Never seen this type of alps/alps clone before. Maybe it's pretty obvious but I'm a noob in alps so anyone know what this is?

Edit: Please excuse the poor quality photo. This is not my keyboard asking for a friend.
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Chyros

04 Jun 2019, 15:33

Uhh are you sure this isn't some kind of dome with slider or something? Oo

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User101

04 Jun 2019, 16:29

Chyros wrote:
04 Jun 2019, 15:33
Uhh are you sure this isn't some kind of dome with slider or something? Oo
Most likely is. I should clarify when I say "alps" clone I just mean alps mount switches generally. Sorry for the confusion.

Findecanor

04 Jun 2019, 16:35

If the "plate" is the same colour as the top and the "switch" looks pretty clean then it is almost always dome-with-slider.

There are many types of Alps-keycap compatible rubber dome-with-slider keyboards.
This was yet another that I had not seen before.

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snuci
Vintage computer guy

13 Jun 2019, 02:33

Can someone tell me what type of key switch this is?
Alps key switch.JPG
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zrrion

13 Jun 2019, 04:37

Image

Image

Any info on this switch?

ball00n

13 Jun 2019, 07:59

snuci wrote:
13 Jun 2019, 02:33
Can someone tell me what type of key switch this is?

Alps key switch.JPG
Alps common mount low profile

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Polecat

18 Jun 2019, 06:14

More stuff from my storage. I have four Datacomp Mac keyboards. One has normal, branded white SKCM switches. The other three have unbranded switches as in the photo. These have wide mounting tabs like normal Alps, not four tabs like most clones. But no branding whatsoever on upper or lower housings. Mold numbering on the upper housing is 1x (upper right, with x being various letters), with the rest blank. Inside it looks like it has a normal Alps switchplate and click leaf. Are these very early white SKCM switches? I thought these boards were newer than that. Was Datacomp using up old stock? Some kind of clone? They feel too nice to be clones.
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DSCN0569.JPG
early white SKCM or clone?
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//gainsborough
ALPSの日常

18 Jun 2019, 06:20

Those definitely look genuine! Could be some early whites for sure!

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Polecat

25 Jun 2019, 06:23

//gainsborough wrote:
18 Jun 2019, 06:20
Those definitely look genuine! Could be some early whites for sure!
Thanks, I'm still trying to make sense of these switches. Case and chip dates on one of the Datacomps is 1993. I found these two related references in the wiki:

wiki/Simplified_Alps_Type_III

wiki/Datadesk_Switchboard

But I have trouble believing these were "erroneous" or "incorrectly moulded". These sound and feel just like early SKCM switches, and look like them too, inside and out, except for a total lack of branding, top and bottom. Nothing at all like branded white Alps from 1993. The example shown in the above links has the same "1x" mold numbering on the upper housing as the ones in my Datacomps, so at least I've found a valid reference and another application where these were used. But what are they?

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//gainsborough
ALPSの日常

25 Jun 2019, 06:32

It could very well be a case similar to what you mention: some old switches were found in their warehouse so they exhausted their stock on some of the newer boards. But even if that's the case, for the switches to have no branding at all is relatively unique, even for alps, isn't it?

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Polecat

25 Jun 2019, 06:49

Seems to me that Alps, or whoever made these, did not want them branded for whatever reason. I'm thinking of the blues that just showed up with "FD" branding as a related example of that.

Datacomp was a big player, so I really doubt they were just using up old stock, especially since the early switches were usually or always branded, at least on the bottom side.

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User101

26 Jun 2019, 18:58

Olivetti praxis 35 typewriter.

Seen this switch couple times already but theres no definitive documentation to be found.

Anyone know the name of this switch or at least the mechanism?

Greatly appreciated
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