Electric cable having high propagation velocity
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United States of America Patent
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-
Feb 15, 1994
Grant Date -
N/A
app pub date -
Nov 13, 1991
filing date -
Nov 14, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
One embodiment comprises: two bare parallel conductors made of bronze; two insulating rods that are substantially helically wound with non-touching turns around the conductors respectively so that the rods interfit and maintain a predetermined distance between the two conductors; and an insulating protective sheath. The helical pitch of the rods is much greater than the cross-section of the rods so the volume between the two conductors is mostly full of air, thereby obtaining reduced permittivity and thus increased propagation velocity. The invention is applicable to data transmission cables for computer machines.
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