Electrical resistors – Mechanically variable – Surfaces pressed together
Reexamination Certificate
2008-06-24
2008-06-24
Lee, K. Richard (Department: 2832)
Electrical resistors
Mechanically variable
Surfaces pressed together
C338S092000
Reexamination Certificate
active
07391296
ABSTRACT:
A variable resistance device comprises a resistive member having a resistive resilient material. A first conductor is configured to be electrically coupled with the resistive member at a first contact location over a first contact area. A second conductor is configured to be electrically coupled with the resistance member at a second contact location over a second contact area. The first contact location and second contact location are spaced from one another by a distance. The resistance between the first conductor at the first contact location and the second conductor at the second contact location is equal to the sum of a straight resistance component and a parallel path resistance component. At least one of the first location, the second location, the first contact area, and the second contact area is changed to produce a change in resistance between the first conductor and the second conductor. The straight resistance component increases or decreases as the distance between the first contact location and the second contact location increases or decrease, respectively. The parallel path resistance component has preset desired characteristics based on selected first and second contact locations and selected first and second contact areas. The first and second contact locations and first and second contact areas can be selected such that the change in the resistance between the first and second contact locations is at least substantially equal to the change in the straight resistance component or the change in the parallel path resistance component.
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Bartholomew J. Kane, “A High Resolution Traction Stress Sensor Array for Use In Robotic Tactile Determination”, A Dissertation Submitted to the Department of Mechanical Engineering and the Committee on Graduate Studies of Stanford University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy, Sep. 1999.
Rogers Michael D.
Schrum Allan E.
Haverstock & Owens LLP
Lee K. Richard
Varatouch Technology Incorporated
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