Method and apparatus to measure tension in a pull line for cable

Details Method and apparatus to measure tension in a pull line for cable Method and apparatus to measure tension in a pull line for cable

1982-02-05

1984-07-10

Swisher, S. Clement

Implements or apparatus for applying pushing or pulling force

Method or apparatus for placement of conductive wire

Conduit snakes

7386244, 34087028, 254270, G01L 506

Patent

active

044588801

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. 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.

REFERENCES:
patent: 2795134 (1957-06-01), Weber et al.
patent: 3384350 (1968-05-01), Powell
patent: 3679180 (1972-07-01), Callaghan
patent: 3823395 (1974-07-01), Rigney et al.
patent: 3961772 (1976-06-01), Sweeney
patent: 3969714 (1976-07-01), Greer
patent: 3995492 (1976-12-01), Clynes
patent: 4420755 (1983-12-01), Primbs, Jr.

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