An insulated electrode cover for a welding electrode holder is provided that can reduce or eliminate inadvertent electrical arcing between the electrode holder and adjacent objects. The insulated electrode cover comprises a cap configured to couple to the welding electrode holder. The cap is positioned on the welding electrode holder to overlie selective portions of the jaws of the welding electrode holder so that, when a welding rod is clamped in the jaws of the electrode holder and the electrode is energized, no electrically conductive portion on the exterior surfaces of the jaws is exposed. This can greatly increase the safety of the welding electrode by reducing or eliminating inadvertent shocks and/or fires that can be created by conventional welding electrode holders.

An insulated electrode cover for a welding electrode holder is provided that can reduce or eliminate inadvertent electrical arcing between the electrode holder and adjacent objects. The insulated electrode cover comprises a cap configured to couple to the welding electrode holder. The cap is positioned on the welding electrode holder to overlie selective portions of the jaws of the welding electrode holder so that, when a welding rod is clamped in the jaws of the electrode holder and the electrode is energized, no electrically conductive portion on the exterior surfaces of the jaws is exposed. This can greatly increase the safety of the welding electrode by reducing or eliminating inadvertent shocks and/or fires that can be created by conventional welding electrode holders.

A lifting adaptor configured to lift a graphite electrode includes a main body having a threaded end to secure the lifting adaptor to threads of the graphite electrode, and a lifting component coupled to the main body opposite the threaded end to lift the graphite electrode. The threaded end of the main body may comprise a non-graphite material with a coefficient of thermal expansion (CTE) similar to Invar, within +/?0 to 1 (?m/(m K)) over a range from room temperature to 400 degrees Fahrenheit.

An electronic atomization device include: a substrate, a heating cavity being formed in the substrate; and an electrode assembly including a first electrode and a second electrode, both the first electrode and the second electrode at least partially extending into the heating cavity. In the heating cavity, an electric arc is controlled to form between the first electrode and the second electrode so as to generate plasma. Negative and positive polarities of the first electrode and the second electrode are switched in a preset cycle.

An electronic atomization device include: a substrate, a heating cavity being formed in the substrate; and an electrode assembly including a first electrode and a second electrode, both the first electrode and the second electrode at least partially extending into the heating cavity. In the heating cavity, an electric arc is controlled to form between the first electrode and the second electrode so as to generate plasma. Negative and positive polarities of the first electrode and the second electrode are switched in a preset cycle.