Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1994-10-05
1995-11-14
Kincaid, Kristine L.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200344, 200345, 200517, H01H 1370
Patent
active
054669014
ABSTRACT:
A keyswitch assembly having a mechanism for controlling touch of a plurality of keys simultaneously. Each key is vertically movably supported on a holder member by a key support assembly. The key support assembly has first and second links intersecting with each other and pivotally connected together at the intersecting portion. A first end of the first link is pivotally connected to the key and a second end of the first link is slidably movable in a horizontal direction and is pivotally connected to the holder member. A first end of the second link is pivotally connected to the holder member, and a second end of the second link is slidably movable in the horizontal direction and is pivotally connected to the key. A biasing segment is connected to the second end of the first link for urging the same. The biasing force of the biasing segment is controllable by moving an operation plate which is connected to the biasing segment.
REFERENCES:
patent: 4433225 (1984-02-01), Cowles
patent: 4580022 (1986-04-01), Oelsch et al.
patent: 4902862 (1990-02-01), Oelsch et al.
patent: 5268545 (1993-12-01), Bruner
patent: 5278371 (1994-01-01), Watanabe et al.
Brother Kogyo Kabushiki Kaisha
Friedhofer Michael A.
Kincaid Kristine L.
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