Signaling material and method for protecting subterranean struct

Details Signaling material and method for protecting subterranean struct Signaling material and method for protecting subterranean struct

1984-09-06

1987-03-31

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

116DIG14, 405157, 174 37, G08B 2100

Patent

active

046546391

ABSTRACT:
A pipeline or other subterranean structure is protected by burying above it a signaling material in the form of a continuous support of a material having low resistance to rupture by carrying at least one row of spaced apart strip sections of a high resistance to rupture. Because the strip sections form a discontinuous band, when encountered by the excavator, the support ruptures and the strip sections can only be pulled and remain unsevered so that free ends of the sections are readily visible to the excavator operator.

REFERENCES:
patent: 3282057 (1961-07-01), Prosser
patent: 3568626 (1971-03-01), Southworth Jr.
patent: 4070911 (1978-01-01), Makin

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