Two terminal variable resistor
OwnerSten R. Gerfastinventor
Life of this patent
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Abstract
A small inexpensive two terminal variable resistance assembly that conveniently changes its resistance when a force of an actuator is applied. It can be made for power applications as well as in miniature dimension versions in values from milli-ohms to meg-ohms. This variable resistor increases its power handling capacity during a decrease in its ohmic value, contrary to present three terminal potentiometers or reostats. It does this by a rolling action that increases or decreases two resistive surface areas in parallel. It could also be used as a variable capacitor.
Claims20
A two terminal variable resistor with rolling action comprising:
- a first resistive strip's two ends mounted on a non-conductive frame,
- a second resistive and resilient strip forming a curved V-shaped gap when connected in series to one end of said first strip,
- electrical connections applied at said first and second strips,
- wherein moving an actuator that increases or decreases the gap of said V-shape,
- also increases and decreases resistive portions in parallel contact between two said resistive strips,
- said increases of resistive portions in parallel contact conjoin the resistance of two said strips,
- with further decrease in said gap substantially conjoins total resistance of two said strips.
A two terminal variable resistor with rolling action comprising:
- a first resistive strip formed into a circular sector with its two ends mounted on a non-conductive frame,
- a second conductive and resilient strip forming a curved V-shaped gap when connected in series to one end of said first strip,
- electrical connections applied at said first and second strips,
- wherein rotating an actuator that increases or decreases the gap of said V-shape,
- also increases and decreases resistive portions in parallel contact between two said resistive strips,
- said increases of resistive portions in parallel contact conjoin the resistance of two said strips,
- with further decrease in said gap substantially conjoins total resistance of two said strips.
Dependencies are inferred from the claim text.