Pressure sensor and data input apparatus

Details Pressure sensor and data input apparatus Pressure sensor and data input apparatus

2011-04-19

2011-04-19

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S724000

Reexamination Certificate

active

07926351

ABSTRACT:
Grounded, circular movable electrode and divided electrodes, formed on a surface of a circular printed board, are opposed to each other via a double-face tape, functioning also as a spacer, with a slight gap interposed therebetween. As a pad is struck with a stick, the gap between the movable electrode and the divided electrodes changes so that capacitance between the movable electrode and the divided electrodes changes, in response to which signals are output from the divided electrodes. The divided electrodes are sandwiched between the grounded movable electrode and a grounded shielded electrode and thus are not influenced from external disturbances. As the pad is struck with the stick, the gap and hence capacitance between the movable electrode and any of the divided electrodes in the struck position changes, in response to which signals are output from the divided electrodes

REFERENCES:
patent: 1 128 174 (2001-08-01), None
patent: 03-107900 (1991-05-01), None
patent: WO-02/089038 (2002-11-01), None
Partial European Search Report mailed Dec. 13, 2010, for EP Application No. 08171179.8, six pages.

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