Capacitor coupled potentiometer
First Claim
1. A potentiometer comprising:
- a resistor member having two ends to which a predetermined AC input voltage is applied;
a movable electrode located along said resistor member between the two ends, said movable electrode facing said resistor member and separated by a predetermined interval therefrom;
an insulator layer of a uniform thickness inserted between said resistor member and said movable electrode; and
an AC output voltage corresponding to a dividing ratio of said resistor member divided by said movable electrode, said AC output voltage being output from said movable electrode via a resistance dividing capacitor formed by said movable electrode and said resistor member facing said movable electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
An annular resistor member having two non-contact ends is overlaid and adhered on the surface of a base, and a rotational shaft located at the central portion of the resistor member is pivotally axially supported via a bearing. A bent electrode arm is fitted on the rotational shaft, and is connected to an output terminal via the rotational shaft or a connection means. A movable electrode, which opposes to the resistor member via a gap, is integrally formed on the end portion of the electrode arm, and a capacitor is formed between the movable electrode and the resistor member. In the above structure, when an AC power supply is flowed across the two ends of the resistor member, the capacitor is formed between the movable electrode and the resistor member, and an attenuated voltage is generated on the movable electrode. The voltage generated on the movable electrode increases/decreases in accordance with the displacement of the movable electrode upon rotation of the rotational shaft, and when this voltage is extracted as a resistance dividing ratio from the output terminal, the rotational angle or displacement amount of the rotational shaft can be detected.
13 Citations
25 Claims
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1. A potentiometer comprising:
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a resistor member having two ends to which a predetermined AC input voltage is applied; a movable electrode located along said resistor member between the two ends, said movable electrode facing said resistor member and separated by a predetermined interval therefrom; an insulator layer of a uniform thickness inserted between said resistor member and said movable electrode; and an AC output voltage corresponding to a dividing ratio of said resistor member divided by said movable electrode, said AC output voltage being output from said movable electrode via a resistance dividing capacitor formed by said movable electrode and said resistor member facing said movable electrode. - View Dependent Claims (2, 3, 4, 5)
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6. A potentiometer comprising:
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a resistor member having two ends to which a predetermined AC input voltage is applied; a movable electrode located along said resistor member between the two ends, said movable electrode facing said resistor member and separated by a predetermined interval therefrom; a first output electrode fixed to said movable electrode and moving together with said movable electrode; a second output electrode formed to extend in a moving direction of said movable electrode so as to oppose the first output electrode and be separated by a predetermined interval therefrom; a first AC output voltage corresponding to a dividing ratio of said resistor member divided by said movable electrode, said first AC output voltage being output from said movable electrode via a resistance dividing capacitor formed by said movable electrode and said resistor member facing said movable electrode; and a second AC output voltage output from said movable electrode being extracted via an output capacitor formed by said first and second output electrodes. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A potentiometer comprising:
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a base consisting of an insulating material; a resistor member formed on said base in an annular shape having two non-contact ends, the two ends of the resistor member being connected to input terminals for applying a predetermined AC input voltage; a rotational shaft pivotally supported by said base, and located at substantially the center of said resistor member; and a support member having two ends, the first end of the support member being fixed to said rotational shaft to support a movable electrode at the second end of the support member, the movable electrode facing said resistor member and maintaining a predetermined interval therebetween, an AC output voltage, corresponding to a dividing ratio of said resistor member divided by said movable electrode in accordance with rotation of said rotational shaft, said AC output voltage being output from said movable electrode via a resistance dividing capacitor formed by said movable electrode and said resistor member facing said movable electrode. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification