Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Reexamination Certificate
2011-03-01
2011-03-01
Bennett, G. Bradley (Department: 2841)
Geometrical instruments
Indicator of direction of force traversing natural media
Magnetic field responsive
C338S03200R
Reexamination Certificate
active
07895759
ABSTRACT:
An electronic device includes resistor, a pointer, a measuring module, a calculating module, and a display module. The resistor has a reference point corresponding with a reference direction. The resistor defines a circle. The pointer has a pointing terminal contacting the resistor at a contacting point corresponding with a reference direction. The pointer is pivotablely mounted about a centre of the circle. The pointer is aligned with the magnetic field of the Earth, and the measuring module measures the voltage between the contacting point and the reference point. The calculating module calculates an angle between the current direction and the reference direction according to the voltage between the contacting point and the reference point of the resistor. The display module displays corresponding direction information according to the angle.
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Bennett G. Bradley
Bonderer D. Austin
Hon Hai Precision Industry Co. Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
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