Editing Burroughs Opto-Electric (section)

==History==
Developed by [[Burroughs]] in the early 1980s as a "low profile", "tactile" and consistent switch using an optoelectronic switching mechanism (note that it's not tactile in the modern sense). Besides being a rare optoelectronic switch, this switch uses a horizontally disposed biasing spring which gives a very unique feel to the key actuation.

Only one keyboard is known to have been built with these switches for the [[Burroughs]] by [[Kokusai Electric]]: the [[BET-KB]].

<gallery widths=300px heights=300px>
File:BOE-ExplodedView.png          | Exploded view of switch.
File:BOE-GreyKeycap-CapsLock.jpg   | Dirty grey dye sublimation keycap, and underside of cap locks key.
File:BOE-BlueKeycap-Legendable.jpg | Dirty blue legendable keycap, pad printed.
File:BOE-Sliders-DirtyPlate.jpg    | Single spring splider, view of torsion spring. Metal plate is both very dirty and heavily corroded.
File:BOE-DoubleSpringSlider.jpg    | Double spring slider, approximately 130 g.
File:BOE-Underside-Slider.jpg      | Underside of sliders attached to metal plate.
File:BOE-LED-Photoresistor.jpg     | LED and photo resistor for each torsion spring slider.
File:BOE-Keycap-profile.jpg        | Clean keycaps, top row uses heavy switches, approximately 130 g.
</gallery>