Current limiting secondary contact
AssigneeIllinois Tool Works Inc.
InventorsMark Richard Christopher, John Walter Lundin
Life of this patent
Estimating the term…
Abstract
A welding-type system includes a welding torch comprising a contact tip to provide an electrode wire. A secondary contact in electrical contact with the electrode wire, the secondary contact located along a length of the electrode wire and before the contact tip. Each of the contact tip and the secondary contact are connected to a welding-type power source. A current limiting device coupling located between the welding-type power source and the secondary contact and configured to limit a current at the secondary contact.
Claims20
A welding-type system comprising:
- a welding torch comprising a contact tip to provide an electrode wire;
- a secondary contact in electrical contact with the electrode wire, the secondary contact located along a length of the electrode wire and before the contact tip, wherein each of the contact tip and the secondary contact are connected to a welding-type power source;
- and
- a current limiting device coupling located between the welding-type power source and the secondary contact and configured to limit a current at the secondary contact.
A welding-type system comprising:
- one or more drive rolls to advance an electrode wire to a welding torch comprising a contact tip;
- a secondary contact in electrical contact with the electrode wire via a drive roll of the one or more drive rolls, wherein each of the contact tip and the secondary contact are connected to a welding-type power source;
- and
- a current limiting device coupling located between the welding-type power source and the secondary contact and configured to limit a current at the secondary contact.
The welding-type system of 16, wherein the electrode wire comprises an aluminum consumable electrode wire.
Dependencies are inferred from the claim text.