Electricity: circuit makers and breakers – Multiple circuit control – Pivoted contact
Patent
1998-11-17
2000-06-27
Luebke, Renee
Electricity: circuit makers and breakers
Multiple circuit control
Pivoted contact
200 4, H01H 2504
Patent
active
060809418
ABSTRACT:
A multi-directional key switch assembly comprises first stage switches and second stage switches of different kinds disposed alternately arrayed at 45.degree. on a common circle at angular intervals on a printed-circuit board, a truncated semi-spherical shell shaped rolling member disposed on the board in overlying relation to thee switches, slide members disposed on the undersurface of the semi-spherical shell shaped rolling member in opposition to the corresponding first stage switches, and actuating means disposed in correspondence with the second stage switches. A key top is mounted on the rolling member and has an integral operating stick extending from the undersurface thereof. The operating stick is inserted in a receiving bore formed through the rolling member from the upper surface to the undersurface thereof along the central axis thereof. Rolling the rolling member by pressing on the key top will cause the corresponding first stage switch to be turned ON, and further continued rolling of the rolling member will actuate the corresponding second switch to turn it ON.
REFERENCES:
patent: 5621196 (1997-04-01), Nishijima et al.
patent: 5691517 (1997-11-01), Yamamoto et al.
patent: 5719361 (1998-02-01), Lee
patent: 5847335 (1998-12-01), Sugahara et al.
Hosiden Corporation
Luebke Renee
LandOfFree
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