Title: Discharge pipe line locator

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.

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Inventors: McCullough, Lester E. (Glendale, CA, US)
Taylor, Richard E. (Hollywood, CA, US)

Application Number: 507334
Filing Date: 1974-09-19
Publication_date: 1976-08-17
Assignee:
Primary Class(es): 342/459 324/67, 324/326
Other Classes:
US Patent Ref:

2601248	Jun, 1952	Brenholdt	324/67.
2908863	Oct, 1959	Neff	324/67.
3518558	Jun, 1970	Miller et al.	307/261.
3597680	Aug, 1971	Haddon	324/3.
3704413	Nov, 1972	Blevins	324/67.
3718930	Feb, 1973	McCullough et al.	343/112.
3831138	Aug, 1974	Rammner	340/18.
3893025	Jul, 1975	Humphrey, Jr.	324/67.

Other Refs:
Primary Examiner: Wilbur, Maynard R.
Assistant Examiner: Blum, T. M.
Attorney: Subkow and Kriegel