Editing Hysteresis (section)

==Terminology==
Cherry refer to the hysteresis in clicky [[Cherry MX]] switches as "'''movement differential'''" and "differential movement" in their [[Cherry catalogues|catalogues]] and in the patent for Cherry MX. The audible click sound generated by the mechanism in question is not mentioned in the patent.

Another common term, found in patents, is "'''lost motion'''", referring to the backlash-like behaviour of hysteresis. The patent for [[Datanetics DC-50 series]] for example notes that an "actuating spring is coupled to the side of the keystem by a lot-motion [sic] connection which provides hysteresis in the key action". Burroughs patent [https://www.google.com/patents/US4034177 US4034177] describes a switch that "uses a lost motion mechanism to prevent the switch from making and breaking contact more than once for each plunger depression".

[[Category:Keyboard terms]]