Reproducing stylus for an information signal recording medium
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United States of America Patent
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Jan 1, 1985
Issued Date -
N/A
app pub date -
Jul 20, 1981
filing date -
Apr 8, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A reproducing stylus traces a track of a recording medium, in which track an information signal is recorded as variations of geometrical shape, and reproduces as variations in capacitance the information signal thus recorded. The reproducing stylus comprises a reproducing stylus main structure having a tip portion with a sliding contact face for slidingly contacting at least one track of the recording medium, and an electrode disposed on the reproducing stylus main structure to trace one track and reproduce the information signal as the variations in capacitance in accordance with the variations in geometrical shape. The electrode has an end edge and side edges. The side edges are substantially parallel at least in the vicinity of the tip portion of the reproducing stylus main structure. The sliding contact face has a leading part and a trailing part respectively at the foremost end and the rearmost end in a relative sliding direction of the sliding contact face on the recording medium. The end edge of the electrode is at said trailing part, the length l of the sliding contact face in the relative sliding direction being larger than the width d of the end edge of the electrode in a direction perpendicular to the relative sliding direction.
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