Method and apparatus to measure tension in a pull line for cable
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United States of America Patent
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Jul 24, 1984
Issued Date -
N/A
app pub date -
Aug 5, 1982
filing date -
Feb 5, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for measuring tension imposed on a cable by a pull line in a conduit includes a tension meter coupled between the cable and the pull line. The meter includes a load cell connected to an electronic circuit to operate an audio transmitter in one embodiment, or to generate an electromagnetic field parallel to the conduit according to a second embodiment. The electromagnetic field induces a tension signal in a metallic conductor extending parallel to the conduit. In a further embodiment, electrical conductors form two of many warp threads of a pull line that also includes a weft thread. The audio or electrical signal is transmitted for detection and for operating a display. An operator uses the display to control tension in the pull line.
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