Variable resistor

Details Variable resistor Variable resistor

1992-11-04

1994-03-01

Lateef, Marvin M.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

338167, 338173, H01C 1032

Patent

active

052911772

ABSTRACT:
A variable resistor includes a case inside which a rotatable member with a resistive element mounted thereon is disposed with a separate rotatable shaft running through a hole formed thereon, a stationary member with external leads attached thereon overlapping the rotatable member with the shaft further running therethrough and extending out thereof to be engaged by a turning knob. The stationary member is secured on the case to form a part thereof. The rotatable shaft is constituted by two segments, an upper segment and a lower segment. A spring is provided between the lower shaft segment and the case to bias the shaft to abut against the rotatable member with an annular flange formed on one end thereof so that when nubs which are formed on the annual flange respectively engage with the corresponding recesses formed on the rotatable member, the rotatable member will follow the rotation of the shaft. The spring is so selected that when the torque transmitted between the shaft and the rotatable member is greater than a pre-determined value, the engagement between the shaft and the rotatable member will be broken. The upper segment of the rotatable shaft is removable from the variable resistor and thus replaceable with a substitute having different configurations for different purposes.

REFERENCES:
patent: 1466293 (1923-08-01), Brooks
patent: 3676822 (1972-07-01), Slagg et al.
patent: 3902152 (1975-08-01), Van Benthuysen
patent: 4353053 (1982-10-01), Matsui et al.
patent: 4523175 (1985-06-01), Sakurai

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