Method and apparatus for locating utility conveyances in an encl

Details Method and apparatus for locating utility conveyances in an encl Method and apparatus for locating utility conveyances in an encl

1997-07-25

1998-12-01

Brown, Glenn W.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 66, 324334, G01V 312

Patent

active

058444050

ABSTRACT:
A selected one of a plurality of underground utility conveyances(14--14) may be located in an enclosure (10) by providing each conveyance with an electronic marker (18). Each marker is responsive to a first RF signal from an electronic marker locator (32) operated by a utility worker. Upon receipt of the first RF signal, the electronic marker associated with the conveyance of interest responds by broadcasting a second RF signal containing information indicative of the conveyance. The second RF signal is received and processed by the electronic locator marker to locate the conveyance and ascertain information related thereto.

REFERENCES:
patent: 4972388 (1990-11-01), Kirkland
patent: 5644237 (1997-07-01), Eslambolchi et al.

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