Ground locating device for cathodically protected steel piping a

Details Ground locating device for cathodically protected steel piping a Ground locating device for cathodically protected steel piping a

1980-10-27

1983-06-07

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

375 59, 455112, G01R 3108

Patent

active

043873375

ABSTRACT:
The device consists of a transmitter and a receiver. The transmitter utilizes multiple frequencies generated by a binary counter divider and includes a carrier frequency, an I.F. frequency, an audible tone frequency, a frequency which gives the ability to use battery power efficiently and a frequency which gives the ability of easy interpretation of the results. It includes a Norgate controlling the ON and OFF state of a power switch which in turn controls a capacitive driver source through a matching transformer to the "load". The receiver consists of a series of sequential filters each tuned to the three highest encodements of the transmitter and operating a visual and audible transducers on the receiver.

REFERENCES:
patent: 2315383 (1943-03-01), Andrews
patent: 2731598 (1956-01-01), Herbert
patent: 3846705 (1974-11-01), Davis
patent: 3904839 (1975-09-01), Peoples

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