High-voltage variable resistor

Details High-voltage variable resistor High-voltage variable resistor

1995-12-27

1998-03-10

Evans, Geoffrey S.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338174, 338187, H01C 1032

Patent

active

057266255

ABSTRACT:
A high-voltage variable resistor capable of significantly small-sizing a circuit board as compared with the prior art. A terminal fitment is provided so as to act as an electrical connector for establishing electrical connection between a slide element fixed on an operation shaft member and slid on a variable resistance pattern formed on a circuit board and an output portion thereof. The terminal fitment includes a contact holding portion which is provided at a distal end thereof with a contact portion. A contact point between the contact portion of the terminal fitment and a contact portion of the slide element is defined on a side of the operation shaft member while being spaced from a front surface of the circuit board. Such construction prevents the contact point from being defined at a central portion of the variable resistance pattern, resulting in a radius of curvature of the variable resistance pattern being reduced as compared with that in the prior art.

REFERENCES:
patent: 2454816 (1948-11-01), Levy
patent: 3512113 (1970-05-01), Kirkendall
patent: 3601743 (1971-08-01), Mathison et al.
patent: 3639878 (1972-02-01), Scheel
patent: 3696318 (1972-10-01), Mack
patent: 3772630 (1973-11-01), Falco
patent: 4344063 (1982-08-01), Nishimoto et al.
patent: 4635028 (1987-01-01), Oelsch et al.
patent: 4835511 (1989-05-01), Henmi
patent: 4884052 (1989-11-01), Eitoku et al.
patent: 5500634 (1996-03-01), Ueda

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