Old Keyboard Key Switches
not a complete list, but i begin to collect and sort out.
Ancient Switches

Invac PK-200, 1966 Invac Optical switch

Univac, 1971 Univac Magnetic Separation Switch

IBM 5251, 1977 beam spring switch
Key Switch Topic
- Key Switch Mechanisms
-
Rubber Dome -
Scissor Switch -
Cherry MX Switches - Noise Comparison
- N-key Rollover (NKRO) and Ghosting
Buckling Spring- Kailh Switch
- Kailh BOX Switch
-
Kailh Choc Switch
Romer-G Switch
Topre Switch
Niz Switch-
Varmilo EC
Optical Switch- XMIT Hall Effect Switch
ALPS Switch- Old Key Switches
- Mechanical Keyboard and RSI