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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7347136 | Airless sprayer with hardened cylinder An airless sprayer for paint or the like consists of an electric drive unit connected to a piston. Driven by the electric drive unit, the piston reciprocates within the cylinder, thus spraying the paint or the like. Because of the close tolerance between the piston ... | 03/25/2008 |
| 7276209 | Air-gas mixing systems and methods for endothermic gas generators Systems and methods create an air-gas mixture supply for an endothermic generator. The systems and methods convey a hydrocarbon gas under pressure through a valve, to thereby form an air-gas mixture supply for the endothermic generator. The systems and methods sense... | 10/02/2007 |
| 6969430 | Process and apparatus for producing atmosphere for high productivity carburizing This invention is directed to a process and apparatus for producing high productivity carburizing. A process is introduced that uses a gas mixture made up of CO, H2, CO2, H2O, CH4 and N2, such that the product o... | 11/29/2005 |
| 6635121 | Method and apparatus for controlling the decarburization of steel components in a furnace The invention relates to a method for controlling the decarburization of steel components in a furnace during heat treating processes. The concentration of CO2 and/or CO in the furnace is monitored in a first batch in order to determine periods... | 10/21/2003 |
| 6612154 | Systems and methods for monitoring or controlling the ratio of hydrogen to water vapor in metal heat treating atmospheres Systems and methods for monitoring a heat treating atmosphere derive from at least one sensor placed in situ in the atmosphere a process variable, which is indicative of the ratio of gaseous hydrogen H2 (g) to water vapor H2 O(g) in ... | 09/02/2003 |
| 6547888 | Modified low temperature case hardening processes An iron-containing workpiece is case hardened by low temperature carburization during which one or more process steps--including adjusting the carburization temperature, adjusting the concentration of carburization specie in the carburization gas and reac... | 04/15/2003 |
| 6106636 | Method and apparatus for controlling the atmosphere in a heat treatment furnace In a method of and apparatus for controlling an atmosphere in a heat treatment furnace according to the present invention, a carburizing is carried out while supplying a hydrocarbon series gas and an oxidization gas into the furnace. The quantity of a res... | 08/22/2000 |
| 6051080 | Rolling element used for toroidal-type continuously variable transmission and method for producing same The invention relates to a power roller used for a toroidal-type continuously variable transmission. This power roller has on its first side a groove for receiving a bearing, and the surface of the groove (bearing surface) has a carbon concentration which... | 04/18/2000 |
| 6051078 | Method and apparatus for controlling the atmosphere in heat treatment furnace In a method of and apparatus for controlling an atmosphere in a heat treatment furnace according to the present invention, a carburizing is carried out while supplying a hydrocarbon series gas and an oxidization gas into the furnace, and the supply of the... | 04/18/2000 |
| 6017641 | Coil spring resistive to delayed fracture and manufacturing method of the same A coil spring made of an oil-tempered steel wire with internal hardness of more than Hv 550 in cross-section, the surface hardness of the oil-tempered steel wire being determined in an extent between Hv 420 in a minimum value and hardness defined by subtr... | 01/25/2000 |
| 5231645 | Method of controlling continuous carburization furnace In the continuous carburization furnace in which the temperature of the heaters can be controlled individually at every carburization processing position; carburization reference data at each carburization processing position is read; a temperature and ca... | 07/27/1993 |
| 4881982 | Method for gaseous carburization of steel A method for gaseous carburization of steel, where, in a carbon-rich gaseous atmosphere, an article that is to be carburized is, in a first carburization phase, exposed to a carbon charge that is as great as possible, at the black limit, and, in a subsequ... | 11/21/1989 |
| 4717429 | Process for the removal of alkali metal nitrite from nitrate containing salt baths Undesired nitrites are formed during the treatment of salt bath nitrided structural components of iron and steel in nitrate containing cooling baths, and they must be removed from the washing water. The build-up of nitrites can be avoided by oxidizing the... | 01/05/1988 |
| 4653314 | Article and method having subsurface property gradient determination capability An annular bead or other protuberance is provided on the outside of a bearing or other part on a non-critical surface so that the protuberance can be case hardened in the same manner as critical surfaces of the part and provide a degree of hardness at eac... | 03/31/1987 |
| 4394234 | Method of processing electrically conductive material by glow discharge A glow discharge surface treatment process wherein only the selected portions of a workpiece adjacent to or surrounded by the associated secondary electrodes are surface-treated so as to provide different treatments on the workpiece according to the posit... | 07/19/1983 |
| 4306919 | Process for carburizing steel In a process for carburizing steel parts, wherein it is desired to shut down the carburizing process for a predetermined period of time without removing the parts, the improvement comprising the following steps: (a) introducing parts, which would not achieve 1... | 12/22/1981 |
| 4232852 | Apparatus for control of the carburization of parts in a vacuum furnace An apparatus for the control of the carburizing of parts under vacuum in a acuum furnace, with which as a carbon carrier a hydrocarbon gas is introduced controlled in the furnace. A detector detects the occurrence of a soot mist formation. Upon the occurre... | 11/11/1980 |
| 4224057 | Method for carburizing sponge iron Sponge iron is carburized in the cooling zone of a vertical shaft iron ore reduction reactor by causing a carbon-containing gas to circulate in a closed loop including the cooling zone of the reactor and an external conduit containing a quench cooler and ... | 09/23/1980 |
| 4042427 | Process for controlling fused salt nitridation of metals with a solid electrolyte electrode A process for controlling the nitriding effect of a nitriding bath of a salt melt containing alkali cyanate for the nitridation of iron and iron alloys wherein the nitriding effect of the bath is maintained in a specific range by determining the voltage o... | 08/16/1977 |
