Discharge pipe line locator

Details Discharge pipe line locator Discharge pipe line locator

1974-09-19

1976-08-17

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

324 3, 324 67, G01S 302, G01V 300, G01R 1900

Patent

active

039757358

ABSTRACT:
An electronic locator for tracing the course of a metallic discharge line which is disposed underground. A reel means stores a length of flexible hollow cable and is operable when rotated to advance the free end of the cable into the metallic discharge line. Conductors extending through the cable provide for electrically connecting an audio frequency signal generator located on the reel means to a transmitter antenna attached to the free end of the cable. A directional receiver means determines the location of the discharge line by detecting the high strength, varying frequency signals generated by the audio frequency signal generator and radiated by the transmitter antenna through the walls of the metallic discharge line.

REFERENCES:
patent: 2601248 (1952-06-01), Brenholdt
patent: 2908863 (1959-10-01), Neff
patent: 3518558 (1970-06-01), Miller et al.
patent: 3597680 (1971-08-01), Haddon
patent: 3704413 (1972-11-01), Blevins
patent: 3718930 (1973-02-01), McCullough et al.
patent: 3831138 (1974-08-01), Rammner
patent: 3893025 (1975-07-01), Humphreys, Jr.

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