Oak Full-Travel Membrane
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| Manufacturer | Oak |
|---|---|
| Switch type | Progressive rate |
| Sense method | Membrane |
Oak Full-Travel Membrane (also written FTM on the label on the keyboard) is a progressive rate spring-over-membrane switch.
Variants[edit | edit source]
Cross mount[edit | edit source]
These have a typical cross mount on the slider's flat top.<ref name="DT-Osborne-1" /> A spring at the bottom of the slider applies pressure to the membrane, and this in addition to the return spring gives it its progressive rate feel.<ref name="DT-disassembly" />
Flat-top[edit | edit source]
This appears to be the more common version. The slider is octagonal on top, and it does not appear to make direct contact with the membrane.<ref name="rzwv-Sun-3" /> Full disassembly has yet to be confirmed and it is not clear how the switch works. Black and white sliders exist.<ref name="rzwv-Sun-3" />
Keyboards[edit | edit source]
- Osborne 1 (cross mount)<ref name="DT-Osborne-1" />
- Sun Type 3 (flat top)<ref name="rzwv-Sun-3" />
- Some IBM Industrial XT<ref name="DT-IBM-XT" />
- GE Fanuc WorkMaster I (flat top)<ref name="GE-WorkMaster-I" />
References[edit | edit source]
<references> <ref name="rzwv-Sun-3">ちゃたりたいね — Sun Type 3 OAKスプリング (Japanese) Dated 2013-10-14. Retrieved 2015-07-31.</ref> <ref name="DT-Osborne-1">Deskthority — Osborne 1: Oak Switch Systems Full Travel Membrane Keyboard!</ref> <ref name="DT-disassembly">Deskthority — Oak FTM Switch Dissection</ref> <ref name="DT-IBM-XT">Deskthority — IBM Industrial Complex</ref> <ref name="GE-WorkMaster-I">Radwell Industry — [http:/https://www.radwell.com/Buy/FANUC/GE%20FANUC/IC640MWS901/]</ref>
</references>
