Title:
POTENTIOMETER
Document Type and Number:
WIPO Patent Application WO/1994/011888
Kind Code:
A1
Abstract:
This invention aims at providing a potentiometer capable of enlarging a range of operating temperature. A resistance member shaped into an open ring with its opposite ends out of contact is put on the surface of a base, and a shaft positioned at the center of the resistance member is rotatably supported by a bearing. A bent electrode arm is fitted to the shaft and is connected to an output terminal through the shaft which is a conductor member, or through connection means. A movable electrode is integrally formed with the end of the electrode arm in such a way that it is opposed to the resistance member with a gap to form a capacitor between the movable electrode and the resistance member. In the structure described above, when an A.C. current flows through the resistance member, a capacitor is formed between the movable electrode and the resistance member, and an attenuated voltage appears at the movable electrode. The voltage at the movable electrode increases or decreases by displacement of the movable electrode with the revolution of the shaft, and when this voltage is taken out as a resistance voltage division ratio from the output terminal, a rotating angle of the rotary shaft and its displacement quantity can be detected.
Inventors:
TONOGAI YOSHIHIDE (JP)
TAKAGI MASAAKI (JP)
TAKAGI MASAAKI (JP)
Application Number:
PCT/JP1993/001643
Publication Date:
May 26, 1994
Filing Date:
November 10, 1993
Export Citation:
Assignee:
COPAL CO LTD (JP)
TONOGAI YOSHIHIDE (JP)
TAKAGI MASAAKI (JP)
TONOGAI YOSHIHIDE (JP)
TAKAGI MASAAKI (JP)
International Classes:
G01B7/30; G01D5/165; G01D5/241; H01C10/32; (IPC1-7): H01C10/30
Foreign References:
| JPS6011601Y2 | 1985-04-17 |
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