Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 4280042 | Process and installation for automatic ignition of a plasma cutting torch The invention relates to a plasma cutting plant comprising a principal generator feeding a plasma arc between a workpiece and an electrode of a torch comprising a tube, with initial ignition by means of an ignition or striking arc between the electrode an... | 07/21/1981 |
| 4280041 | Apparatus for arc welding or plasma cutting An arc welding or plasma cutting apparatus has a current source as well as a set of controls for the welding or cutting process and includes a diagnosis apparatus which can be hooked up to the current source and/or the controls.... | 07/21/1981 |
| 4195216 | Plasma welding In plasma welding apparatus controls are provided which regulate the rates of increasing and decreasing the welding parameters e.g., welding current, gas flow and wire feed to prevent the formations of craters in the weld at the end of a welding run. Impr... | 03/25/1980 |
| 4187409 | Apparatus for and method of plasma pre-weld and post-weld metal preparation A conventional plasma arc cutting torch in which the plasma gas passageway of a cutting tip is flared about 90 degrees outwardly, the cutting torch angle-to-work is about 45 degrees, the torch stand-off from the work is about 3/16 inch, and the torch trav... | 02/05/1980 |
| 4175225 | Gas flow control circuit for plasma arc welding In plasma arc welding apparatus of a type including a plasma arc torch which is movable relative to a welding stock and transforms orifice gas into a plasma jet stream directed toward the welding stock, the flow of orifice gas is regulated by a throttle v... | 11/20/1979 |
| 4162389 | Welding apparatus In a welding apparatus for overlaying on a base metal, a reverse polarity soft plasma arc is formed between an electrode and the base metal and a welding rod is fed into the arc to weld the base metal by melting the welding rod and the feeding speed of th... | 07/24/1979 |
| 4156125 | Method of and means for spacing control of plasma arc cutting torch including vector velocity compensation A method of automatically maintaining a selected spacing for a plasma arc cutting torch form a workpiece is disclosed which takes advantage of the fact that at any given setting of a plasma arc power supply the current in the arc varies inversely and the ... | 05/22/1979 |
| 4146772 | Method of and device for plasma-MIG welding Plasma-MIG welding in which a thermally ionizable inert gas is flowed past a starter non-consumable electrode through a nozzle non-consumable electrode toward a workpiece, firstly a plasma arc is established between such starter non-consumable electrode a... | 03/27/1979 |
| 4104505 | Method of hard surfacing by plasma torch The plasma torch of this disclosure provides a shielded plasma arc using an external powder feed and an inert gas shield. The torch of this disclosure has a smaller outside diameter than prior art torches and allows better orientation of the torch with re... | 08/01/1978 |
| 4039798 | Underwater welding A process for arc welding in an underwater environment wherein a welding chamber is positioned adjacent a workpiece and an arc welding torch is positioned therein. A gas under pressure is introduced into the chamber to displace the water and a gas is supp... | 08/02/1977 |
| 4035605 | Narrow groove welding method, and welding apparatus for practicing the method The front and rear surfaces of plates to be butt-welded are slidably held by front and rear backing shoes, respectively, for defining a welding space in a narrow groove formed by the edges of the plates, and the edges are melted by a plasma arc generating... | 07/12/1977 |
| 4016397 | Method of and apparatus for arc welding Method of arc welding in which an electric arc is maintained between a welding wire and a workpiece in a thermally ionized gas which is produced by an electric arc maintained between the workpiece and the inner surface of a nozzle which acts as a non-cons... | 04/05/1977 |
| 3988566 | Automatic plasma flame spraying process and apparatus A plasma flame-spraying apparatus, having a source of primary gas and a source of a secondary plasma gas, is provided with means for insuring that when the secondary gas in passed through the electric arc established in the flame-spraying apparatus, which... | 10/26/1976 |
| 3975615 | Vertical position welding method and apparatus for practicing the method In a vertical position welding method and an apparatus for practicing the method, front and rear water-cooling type backing shoes are slidably positioned on the front and rear surfaces of metal plates to be butt-welded, respectively, so as to form a weldi... | 08/17/1976 |
| 3969603 | Plasma-MIG arc welding A plasma-MIG welding method and device in which a stream of oxidizing gas, such as argon plus 2% oxygen, is introduced into the plasma arc in the region of the plasma nozzle orifice. This improves the stability of the MIG arc, and higher welding currents ... | 07/13/1976 |
