Apparatus for sensing the distance between an object of electric

Details Apparatus for sensing the distance between an object of electric Apparatus for sensing the distance between an object of electric

1982-06-25

1984-05-15

Shaw, C. C.

Electric heating

Metal heating

By arc

21912403, B23K 910

Patent

active

044490305

ABSTRACT:
An apparatus for sensing the distance between an object of electrically conductive material and a reference point has an electrode, the tip of which constitutes the reference point. The electrode is connected via a supply line to a high voltage source adapted to generate high voltage pulses to provide an arc between the electrode tip and the object. The apparatus also has an air-cored measuring coil disposed around the supply line for sensing the electric field about the supply line and transmitting to a measuring signal sensing circuit a measuring signal proportional to the electric field. The measuring signal sensing circuit preferably comprises a comparator unit adapted to compare the measuring signal with a signal corresponding to a predetermined distance between the object and the electrode point.

REFERENCES:
patent: 4041373 (1977-08-01), Maringer
patent: 4090130 (1978-05-01), Willenbecher, Jr.
patent: 4121154 (1978-10-01), Keating
patent: 4249062 (1981-02-01), Hozumi et al.

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