Univac, 1971.
“Depression of key, drives a stem, stresses a spring, release a magnetic latch. A projectile is fired, impacting a flexible sheet capacitor. Resulting electrode deflection causes a increase in capacitive coupling.”
http://xahlee.info/kbd/univac_keyboard.html
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∑ XahLee (xahlee@noagendasocial.com)'s status on Tuesday, 14-Nov-2017 14:07:23 EST ∑ XahLee