Passive marker structure

Details Passive marker structure Passive marker structure

G - Physics

01

V

33/199, 340/124.

G01V 3/12 (2006.01) G01C 15/04 (2006.01) G01V 15/00 (2006.01)

Patent

CA 1263722

Abstract A passive marker including a tuned circuit having an inductance and a capacitance carried by a carrier enclosed within a hollow sphere that is partially filled with a liquid to freely float the carrier. The inductance includes a coil which, when the carrier is floating, positions the axis of the coil so it is closer to the vertical than the horizontal. The passive marker is of a type that is buried relative to portions of utilities such as gas, telephone, water and power lines, for use in locating such portions when necessary.

536848

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