Appeal No. 1997-2426
Application 08/087,849
and 12 through 37 have been canceled.
This invention relates to a noise absorber for absorbing and reflecting electrical noise
transmitted along an electrical cable. In particular, the Appellants disclose on pages 7 through 10 of the
specification and illustrated in figure 6A, a case member 105 with a pair of ferrite pieces 103. The case
member 105 has a fixing hole 105j for fixing a spring member 107 to case member 105. While the
case 105 is in a closed state, spring member 107 is deflected with the resilience applied to the ferrite
pieces 103 forming a closed loop. The ferrite pieces are kept in close contact with each other. Case
105 is closed such that the cable 109 is between the ferrite pieces 103.
This invention further relates to spreading a magnetic fluid 224 on both abutting planes of the
ferrite pieces 103 (or 203). The Appellants disclose on page 11 of the specification that the magnetic
fluid 224 is a stable colloidal solution in which ferromagnetic grains are dispersed in a non-magnetic
solution such as water and light oil. The magnetic fluid paves the rough abutting planes of the ferrite
pieces.
The independent claims 38, 44 and 50 are reproduced as follows:
38. An electric noise absorber for attenuating electric noise on an electric cable, said noise
absorber comprising:
two bodies of magnetic material, each magnetic body having abutment surfaces which contact
the abutment surfaces of the other magnetic body to form a magnetic circuit, each of the magnetic
bodies having a notch located at one end of the magnetic body;
two case members which are relatively movable into a closed position, each of the case
2
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