Dielectric coating for capacitive position transducers to reduce

Details Dielectric coating for capacitive position transducers to reduce Dielectric coating for capacitive position transducers to reduce

1993-09-15

1995-05-16

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324690, 34087037, G01B 702

Patent

active

054164249

ABSTRACT:
A capacitive position transducer with reduced sensitivity to particulate and fluid contaminants. The electrodes of the position transducer are provided with a relatively thick coating of dielectric material so that the series impedance of the dielectric coatings is at least equal to the maximum capacitive impedance between the coatings whether or not there are any contaminants positioned therebetween. In one embodiment, the coatings are spaced-apart from each other to create an air gap while in another embodiment the coatings are resiliently biased toward each other so that the coatings slide along each other.

REFERENCES:
patent: 4420754 (1983-12-01), Andermo
patent: 4879508 (1989-11-01), Andermo
patent: 5045798 (1991-09-01), Hendrick
patent: 5049824 (1991-09-01), Suzuki et al.
patent: 5172485 (1992-12-01), Gerhard et al.
patent: 5304937 (1994-04-01), Meyer

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