Rotatable variable resistor with clicking mechanism

Details Rotatable variable resistor with clicking mechanism Rotatable variable resistor with clicking mechanism

2006-05-09

2006-05-09

Hoang, Tu (Department: 2832)

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

C338S170000

Reexamination Certificate

active

07042329

ABSTRACT:
A rotatable variable resistor with a clicking mechanism includes a rotary unit provided with a rotor and a wiper, and a fixed unit provided with a cover, a resistor substrate, and external terminals. The wiper has an arm segment, a clicking projection and a non-clicking projection. The undersurface of the cover is provided with a clicking depression. The distance from the center of rotation of the rotary unit to the top of the clicking projection is different from the distance from the center of rotation to the top of the non-clicking projection. The non-clicking projection may have a flat top portion with a width extending in one direction that is greater than that of the clicking depression such that a sliding track of the top of the clicking projection is located within a sliding track of the non-clicking projection in the radius direction. The clicking depression may alternatively be an aperture.

REFERENCES:
patent: 3544946 (1970-12-01), Murakami
patent: 4306216 (1981-12-01), Azema et al.
patent: 4427966 (1984-01-01), Gratzinger et al.
patent: 5291177 (1994-03-01), Chiu
patent: 5939973 (1999-08-01), Imamura
patent: 6791049 (2004-09-01), Yamazaki
patent: 62-189704 (1987-08-01), None
patent: 09-063812 (1997-03-01), None
patent: 09-232110 (1997-09-01), None
European Examination Report issued on Oct. 20, 2005 in the corresponding European Application No. 04 012 253.3-2214.

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