Keyboard having key floating device

Details Keyboard having key floating device Keyboard having key floating device

2005-11-08

2005-11-08

Hirshfeld, Andrew H. (Department: 2854)

Typewriting machines

Key-board or key lever-actuating mechanism

Key-cap or key-stem structure

C400S479000, C400S479200, C400S481000

Reexamination Certificate

active

06962452

ABSTRACT:
A keyboard includes a housing having a number of passages formed by cylindrical members, a number of keys each having a shank slidably engaged in the passages of the housing, and an electromagnetic floating force generating device having a number of coils arranged to generate electromagnetic floating force and to float the keys relative to the housing. A number of magnets may be attached onto the keys and acted with the coils, to allow the keys to be floated by the electromagnetic floating force generated by the coils or the magnets. One or more fan devices may be disposed in the housing to circulate air through the keys.

REFERENCES:
patent: 3831730 (1974-08-01), Koeppe
patent: 5120923 (1992-06-01), Kato et al.
patent: 5199556 (1993-04-01), Lee
patent: 5220318 (1993-06-01), Staley
patent: 5911529 (1999-06-01), Crisan
patent: 6842332 (2005-01-01), Rubenson et al.
patent: 2003/0072595 (2003-04-01), Al-Safar

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