Appeal No. 2002-0558 Page 6
Application No. 09/289,076
conductive element 30 which provides a ground path for the insulation charging
current 32." Col. 6, ll. 5-8.
Meyer's device also includes an amplifier. Specifically, "coil assembly 34 is
electrically connected to a sensor electronic circuit or transmitter 38. . . . The
transmitter 38 performs the functions of amplifying and rectifying the sensor voltage
signal Vs." Id. at ll. 25-29 (emphasis added). Furthermore, we find that the transmitter,
which operates as an amplifier inter alia, generates a signal proportional to the leakage
current. Specifically, "[o]utput driver circuits in the transmitter 38 are used to modulate
a DC current I1 in a control loop 40. The modulation results in the current signal I1
containing a proportionate magnitude of the charging current 32." Id. at ll. 29-33
(emphasis added).
Second, the appellant argues, "[t]here is no disclosure of coil 34 having a
secondary resistance." (Appeal Br. at 5.) The examiner asserts, "[a] secondary
winding having a resistance is an inherent property of a winding."
Claim 1 specifies in pertinent part the following limitations: "a secondary winding,
the secondary winding having a secondary resistance. . . ." Giving the claim its
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