with direct passage of current through the material being heated

Full Title

Arrangement of elements for electric heating in or on furnaces > Ohmic resistance heating > with direct passage of current through the material being heated

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

FURNACES; KILNS, OVENS OR RETORTS

Subclass:

DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE