Appeal No. 95-1994
Application 07/732,493
part of the prior art admitted by appellants and discussed at
specification page 1, line 25 through page 3, line 20. Page 2
of the specification discusses in detail the formula C = KAr
divided by D. Thus, the capacitance “C” of a sensor is
determined by the product of the permittivity “K” and the
overlapping surface area “Ar” of a conductive area with a
sensor, divided by the distance “D” between the respective
conductive area and the sensor. The sensor during its use
itself forms a separate capacitor with the conductive surface
which is grounded. The above equation is labeled equation
(1).
The text at page 3 of the specification as filed at lines
8 through 20 states the following:
Equation (1) shows that for
constant dielectric value K and
overlapping surface Ar, the
capacitance C, ..., varies according
to the inverse of the distance D
separating the sensor from the
conductive part, making possible the
mentioned method for dynamic and non-
contact measurement of the distance
between the nearest capacitive sensor
plate from a conductive part and the
conductive part.
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