Chip variable resistor

Details Chip variable resistor Chip variable resistor

2008-05-06

2008-05-06

Enad, Elvin (Department: 2832)

Electrical resistors

With base extending along resistance element

Resistance element and/or terminals printed or marked on base

Reexamination Certificate

active

07369034

ABSTRACT:
A chip variable resistor which is capable of keeping the resistance at an adjusted value and can be manufactured easily is provided.An insulating substrate is formed with a through-hole capable of receiving a driver, and the upper surface of the insulating substrate is formed with a resistor film surrounding the through-hole. A rotor in the form of a circular plate overlaps the resistor film via a spacer made of an insulating material. The rotor is pressed and held from the outside by a holder made of a metal plate. The spacer is partially cut away so that a contact portion of the rotor is exposed downward for coming into contact with the resistor film. Since the holder surrounds the rotor from the outside, the resilient force of the holder can strongly act on the rotor. Therefore, the resistance can be reliably kept at the adjusted value.

REFERENCES:
patent: 3413588 (1968-11-01), Ferrell
patent: 4465994 (1984-08-01), Rehberger
patent: 4721940 (1988-01-01), Otani
patent: 54-98549 (1979-07-01), None
patent: 5-33502 (1993-04-01), None
patent: 05243019 (1993-09-01), None
patent: 7-147206 (1995-06-01), None
patent: 11-297517 (1999-10-01), None
patent: 2000-124011 (2000-04-01), None

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