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geekhack Community => Keyboards => Topic started by: Jixr on Thu, 10 July 2014, 18:21:52

Title: What switches are these ( old typwriter )
Post by: Jixr on Thu, 10 July 2014, 18:21:52

found this old typewriter at work and was wondering what kind of switch this thing has.

Feels kinda weird in a good way. smooth but kinda progressive feeling.

 thick dub shot and even trip shot caps on it too.

Xerox 627 Memory-something ( text worn off )

(http://i1329.photobucket.com/albums/w553/ClaytonGFinley/photo_zps50a7013f.jpg) (http://s1329.photobucket.com/user/ClaytonGFinley/media/photo_zps50a7013f.jpg.html)

(http://i1329.photobucket.com/albums/w553/ClaytonGFinley/image_zps06299796.jpeg) (http://s1329.photobucket.com/user/ClaytonGFinley/media/image_zps06299796.jpeg.html)

Title: Re: What switches are these ( old typwriter )
Post by: dorkvader on Thu, 10 July 2014, 18:38:57

oh cool, the keycaps are compatible with honeywell hall effect. do you mink taking a shot of the underside of a tripleshot one?

based on the slider, I'd guess that if it's not a rubber dome, it's some sort of spring over membrane or foam & foil.

I'd say it's likely a xerox memorywriter.

Title: Re: What switches are these ( old typwriter )
Post by: Jixr on Thu, 10 July 2014, 18:59:50

(http://i1329.photobucket.com/albums/w553/ClaytonGFinley/photo_zps43156321.jpg) (http://s1329.photobucket.com/user/ClaytonGFinley/media/photo_zps43156321.jpg.html)

Title: Re: What switches are these ( old typwriter )
Post by: jacobolus on Thu, 10 July 2014, 19:49:45

Looks like this one e.g.
http://www.ebay.com/itm/131144973935

Willing to take the whole thing apart and show us what’s inside? I’m curious whether other Memorywriters used hall effect switches; otherwise I can’t see a big reason to use compatible keycap mounts.

Title: Re: What switches are these ( old typwriter )
Post by: Parak on Thu, 10 July 2014, 20:40:22

<dave>Don't turn it on - take it apart!</dave>

Title: Re: What switches are these ( old typwriter )
Post by: dorkvader on Fri, 11 July 2014, 02:30:38

Quote from: jacobolus on Thu, 10 July 2014, 19:49:45

I’m curious whether other Memorywriters used hall effect switches

The keycaps look like they'll fit over hall effect switches.

The switches in the picture do not look like hall effect to me. I suspect slider over dome or spring over membrane, but it could also be foam&foil.

@jixr: thanks for taking the tripleshot picture for me! It's really rather different from the microswitch tripleshots. I wonder who made the keycaps for this.