Micro Switch ST Series
 | |
| Manufacturer | Micro Switch |
|---|---|
| Switch type | Tactile |
| Sense method | Membrane |
| Switch mount | Plate mount |
Micro Switch ST is a series of computer keyboards and their associated switches. Switches are the slider over rubber dome over membrane type from Micro Switch. The clicky counterpart is Micro Switch SC Series.
Description
The model 122ST brochure listed below describes the keyboard as "silent-tactile" but does not specifically cite the name "ST series". Model 122ST13S-25E is described as having "solid state capacitance switching", which seems to be at odds with discovered ST series keyboard units, which are all membrane based. The ST Series brochure linked below refers to "ST Low Profile Silent-Tactile keyboards" but makes no mention of the keystroke sensing method utilised.
In ST series keyboards found to date, the switch uppers are discrete, and are plate mounted. The switch upper housing retains the slider. The rubber dome is retained by the slider using a friction fit. Potentially "ST" refers to the removable slider modules, which could have been adapted for capacitive sensing.
Switches
The known variants are as follows:
| Slider colour | Notes |
|---|---|
| Black | Most common variant |
| Tan | Space Bar stabilizer |
| Blue | Keycap mount differs from other variants |
Keyboards
- Bull 115ST (115ST13-8E-1-J, black and tan, 1991)
- Celerity Computing 210121-A0003 (black, 1984)
- GRiD GRiDCase 1520 rugged 286 Laptop (72ST22-1-J, black?, 1989)
- Honeywell D3013 unknown laptop (black and tan, 1989)
- IBM 73x3832 Quiet Touch (blue, 1987)
- Memorex Telex 957290-001[1]
- Micro Switch 122ST13S-25E (blue, 1987)
- Telex 122ST33S-46E-J
The IBM 73x3832 keyboard confusingly uses a variety of SC codes throughout, instead of the expected ST codes, as though it were using Micro Switch SC Series switches.
Gallery
The black switch below is branded with an older version of the Honeywell logo, a bold serif "H", enclosed in a square with one pair of opposite corners rounded.[2] The tan switch is Micro Switch-branded ("MICRO").
Black version
Black version
Black version (showing red slider)
Tan version
Tan version
Blue version
Blue version
Documents
- Low Profile Silent-Tactile Keyboards Comparison Guide
- IBM PC Or PC-AT Compatible Silent-Tactile Keyboard 122ST13S-25E
References
- ↑ Geekhack — Old Memorex Telex AT
- ↑ Logoblink.com — Honeywell brief logo history and logo guidelines
