Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 6727465 | Apparatus for overlay welding of a tube exterior An overlay welding apparatus for depositing an overlay weld on rotating tube stock. The apparatus comprises an elongate frame and supports for rotating the tube stock about a central axis thereof. The tube stock is inclined relative to horizontal when supported by t... | 04/27/2004 |
| 5942289 | Hardfacing a surface utilizing a method and apparatus having a chill block A hardfacing apparatus includes a deposition head including a heat source, a hardfacing material source, and a chill block having a chill block surface. The deposition head is positioned at a location so as to deposit a mass of the hardfacing material ont... | 08/24/1999 |
| 5375758 | Welding method of and apparatus for reconditioning hard metal products This disclosure is directed to a method of and apparatus for applying a weld bead upon a surface of a chilled white iron product by (a) moving a surface of the product along a predetermined path of travel in a desired direction, (b) directing a stream of ... | 12/27/1994 |
| 4894505 | Modified rotating reusable preform An apparatus for building an axially symmetrical workpiece of desired geometry by deposit welding which uses a welding head 18 for depositing molten weld material 14 and a rotatable, reusable preform 10 which translates with the welding head 18. The reusa... | 01/16/1990 |
| 4857693 | Method of forming stub ends A method of forming stub ends used for joining pipes together by depositing successive layers of weld metal on the outer circumference of a rotating length of pipe. Initial layers having a common forward edge but of decreasing width are deposited to provi... | 08/15/1989 |
| 4842186 | Method and apparatus for building a workpiece by deposit welding A method and apparatus for building a workpiece of a desired geometry by deposit welding with a reusable preform. The reusable preform forms, supports, and cools the deposited molten weld material puddle while the weld material is solidifying thereby elim... | 06/27/1989 |
| 4828161 | Method and device for manufacturing thin-walled hollow bodies of concentric metal layers A method and device for manufacturing thin-walled hollow bodies comprising concentric layers employs, for thin-walled structural parts of chemical installations subjected to stress at high temperatures, non-layered pipes of single-metal materials. Due to ... | 05/09/1989 |
| 4807800 | Method for manufacturing thin-walled hollow bodies of concentric metal layers A method for manufacturing thin-walled hollow bodies comprising concentric layers forming thin-walled structural parts of chemical installations subjected to stress at high temperatures, thereby replacing non-layered pipes of single-metal materials. Due t... | 02/28/1989 |
| 4775092 | Method and apparatus for building a workpiece by deposit welding A method and apparatus for building an axially symmetrical workpiece of desired geometry by deposit welding which uses a translatable welding head for depositing molten weld material and a rotatable, reusable shoe which translates with the welding head. T... | 10/04/1988 |
| 4621762 | Device for building up a workpiece by deposit welding A device for building up a workpiece of any shape by deposit welding comprising a support device for the workpiece and a welding head for depositing the filler material. A form shoe is arranged on both sides of the workpiece wall that it being built up. E... | 11/11/1986 |
| 4563562 | Hot wire welder A hot wire welder comprises a plurality of longitudinal tubes with welding wire moving through the tubes. At one end, buss bars pass power to the wires as they emerge from the tubes. Replaceable copper inserts are positioned between the wires and the buss... | 01/07/1986 |
| 4562327 | Piston and process of providing wear-resisting surfaces in the ring grooves of an aluminum alloy combustion engine piston An arc welding process is used for form wear-resistant surfaces at least in the uppermost ring groove of aluminum alloy pistons for internal combustion engines. To reduce the manufacturing costs and to avoid an increase of the weight of the piston, the pi... | 12/31/1985 |
| 4517434 | Method and apparatus for manufacturing a tube bend metal A method of manufacturing a tube bend of a metal comprises positioning a base ring in the range of the welding device, using the welding device to deposit a first section of metal on the ring, moving the ring and the welding device through an arc relative... | 05/14/1985 |
| 4431902 | Portable hardbander An apparatus for applying a band of hardened metal around a portion of a drill collar in accordance with conventional MIG or TIG welding processes. The improved hardbanding system comprises an AC power source coupled to a water cooled, MIG or TIG welding ... | 02/14/1984 |
| 4405851 | Apparatus for transfer of metallic materials by electric discharge An apparatus and process for depositing metal from one conductor to another by electrode deposition. One conductor, the electrode, may remain in contact with the other conductor, the workpiece, as the electrode is continuously oscillated about a central e... | 09/20/1983 |
| 4233487 | Metal build-up apparatus with improved cooling means A first contact joint screwed to the open end of a lubrication oil passage bore within the shaft of a track roller whose surface is to be rebuilt by welding material thereto, bears cooling medium inlet and outlet ports, bears an intake tube whose length i... | 11/11/1980 |
| 4230928 | Method and machine for rebuilding track roller assemblies Machine for rebuilding by welding hard metal on track roller assemblies. The machine includes a system for recirculating coolant through the assembly during a welding operation and for controlling the temperature of the coolant. The machine further includ... | 10/28/1980 |
| 4228336 | Method of manufacturing stay ring for water turbine and pump turbine A method of manufacturing a stay ring for a water turbine or pump turbine having an upper annular disc, a lower annular disc and a plurality of circumferentially equal-distantly spaced stay vanes extending between the upper and lower annular discs. The me... | 10/14/1980 |
| 4144442 | Process for producing a component part of a railway switch or a railway crossing and component part of railway switches or railway crossings produced by such process Process for producing a component part of a railway switch or of a railway crossing in which frogs consisting of austenitic manganese steel casting are, with interposition of an intermediate piece, connected by a welding operation with rails consisting of... | 03/13/1979 |
| 4140892 | Plasma-arc spraying torch A plasma-arc spraying torch is disclosed which comprises a cathode unit and a separable anode unit which units are connected to each other approximately at a section of the torch in which the cathode of the torch is mounted on a cathode supporting member.... | 02/20/1979 |
| 4127760 | Electrical plasma jet torch and electrode therefor An electrical plasma jet torch has front and back electrodes mounted in a torch body and means for maintaining a high current electric arc between the electrodes. The front electrode is the anode and is formed with a passage that provides a nozzle through... | 11/28/1978 |
| 4103138 | Apparatus for build-up welding with cooling of a sealed and lubricated track link A method and apparatus for feeding coolant to the interior of a connecting pin during build-up welding of a track link assembly, for protecting the peripheral seal members of the connecting pin from the welding heat, comprising a coolant charging and disc... | 07/25/1978 |
| 3989918 | Apparatus for use in repair of ingot molds An apparatus for the repair of ingot molds is disclosed. The ingot mold rests upon a layer of graphite powder whereby current can be passed through the ingot mold without the need for grinding thereof.... | 11/02/1976 |
| 3985995 | Method of making large structural one-piece parts of metal, particularly one-piece shafts Very large diameter metal shafts for turbines and electric generators, and other large structural metal parts, can be made in one piece to a high quality without occlusions, cavities, segregations, and cracks by building the part up layer by layer, each l... | 10/12/1976 |
| 3953704 | Coating apparatus The apparatus comprises a plasma torch capable of an output speed of at least 100 m/s, a fine powder distributor, and a substrate holder which can be heated electrically and cooled by water, which is at an adjustable distance from the torch, and which is ... | 04/27/1976 |
| 3951340 | Electrostatic powder projection system and method In an installation for the electrostatic projection of powders for coating objects, a method of improving the efficiency of projection and deposit of the said powders consists of increasing the relative humidity of the projection gas in the immediate vici... | 04/20/1976 |
