Telegraphy – Systems – Position coordinate determination for writing
Patent
1995-07-13
1997-07-01
Kuntz, Curtis
Telegraphy
Systems
Position coordinate determination for writing
178 19, 345174, 345176, 345178, G08C 2100, G09G 302
Patent
active
056441088
ABSTRACT:
A position indicator having an oscillation circuit consisting of a first coil for detecting coordinates and a condenser, wherein a control coil and the first coil are placed side by side in such a manner that an induced current running through the first coil surrounds a part of a magnetic flux generated at the first coil and the control coil is controlled to be opened/closed and a distribution of a magnetic flux passing the first coil is varied, which enables an angle of rotation and angle of inclination for the position indicator to be detected.
REFERENCES:
patent: 3819857 (1974-06-01), Inokuchi
patent: 4678870 (1987-07-01), Taguchi
patent: 4810838 (1989-03-01), Ichinokawa
patent: 4947156 (1990-08-01), Sato
patent: 5120907 (1992-06-01), Shinbori
patent: 5130500 (1992-07-01), Murakami
patent: 5218173 (1993-06-01), Garwin
Fukuzaki Yasuhiro
Katsurahira Yuji
Kuntz Curtis
Shankar Vijay
Wacom Co. Ltd.
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