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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 5938866 | Method and an apparatus for the treatment of components by a gas mixture An apparatus for the treatment of components by means of a gas mixture, comprising mainly a first light gas and minor amounts of a second gas being heavier than the first gas, has a treatment chamber (10) in which the treatment occurs and a concentration,... | 08/17/1999 |
| 5591274 | Heat treatment method for metals An exhaust gas of hydrocarbon is converted to an exothermic generated gas when it is burnt with air in a burner. The exothermic generated gas which has been dehydrated, is employed as a furnace atmosphere for decarburization or carburizing heat treatment,... | 01/07/1997 |
| 5462634 | Surface-treated aluminum material and method for its surface treatment An aluminum material is surface-treated with an aqueous solution containing 0.005 mol/lit. or more of a chelating agent and 5 g/lit. or more of an organic amine and having 100 ppm or less of phosphoric acid radical ion concentration and 500 ppm or less of... | 10/31/1995 |
| 5419791 | Method of heat assisted sheet metal forming in 360 degree shapes This is a method for heat assisted forming, annealing, and hardening 360° sheet metal shapes in a clean environment in a single facility that results in dimensionally correct, cost-effective, contaminant free parts.... | 05/30/1995 |
| 5158625 | Process and apparatus for heat treating articles while hardening in gaseous medium Process for heat treating articles by hardening them in a recirculating gas medium which is in contact with the treated articles, the hardening gas being cooled by means of a heat exchanger, of the type in which helium is used as hardening gas, and is sto... | 10/27/1992 |
| 4738731 | Method of heat treating metal using a washable synthetic quenchant A method of quenching metal components utilizing a water based quenching composition which includes a polyvinylpyrrolidone polymer of high molecular weight and in relatively high concentrations and thereafter power washing the parts to remove the polymeri... | 04/19/1988 |
| 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 |
| 4571273 | Process of heating and cooling charges in batch-process industrial furnaces In a process of heating and cooling charges in batch-process industrial furnaces, particularly in a process of cooling coils of steel wire or strip steel in bell-type annealing furnaces, the charge is heated and cooled in contact with circulated protectiv... | 02/18/1986 |
| 4431464 | Salt bath quenching method and apparatus The quench severity of a molten salt bath is drammatically increased by adding substantial amounts of water to the bath while it is being vigorously agitated by two impellors submerged in the bath. One impellor causes an upward flow and the other a downwa... | 02/14/1984 |
| 4414043 | Continuous decarburization annealing with recycle to convert carbon monoxide In the decarburization annealing of steel strip, wherein the annealing atmosphere flows counter to the strip motion in the furnace, there is an undesirable buildup of carbon monoxide in the zone where the strip enters the furnace. Carbon monoxide is undes... | 11/08/1983 |
| 4396439 | Recovery and recycle of nitrate and nitrite salts from chloride containing quench bath solids A method is provided for the recovery and recycle of nitrate and nitrite salts present in environmentally hazardous chloride containing quench bath solids, comprising the steps of leaching the solids with hot water to provide an aqueous leachate that depl... | 08/02/1983 |
| 4251292 | Method for restoring molecular weight distribution of a polymeric quenchant The subject invention provides a method and apparatus for the control and or rectification of molecular weight distribution of polymeric quenchants. In general this is accomplished by selective filtration and elimination of lower molecular weight constitu... | 02/17/1981 |
| 4243439 | Process of quenching metal pieces and product produced The invention concerns a new process for quenching metallic pieces and intended to limit the stresses engendered by quenching without essentially affecting the characteristics. This process consists of quenching the pieces by immersion in a binder of the ... | 01/06/1981 |
| 4066477 | Method of maintaining temperature of salt bath during quenching of steel wire A fluid is admitted into a bath having a certain temperature. The temperature of the fluid is different from that of the bath. The fluid travels through the bath so that heat transfer occurs between the bath and the fluid while, at the same time, the bath... | 01/03/1978 |
| 4055446 | Salt bath quenching of construction parts treated with a nitriding bath Iron and steel construction parts which have been treated in a high cyanate, low cyanide or cyanide free nitriding salt bath or in other cyanide containing salt baths are tempered in a bath comprising an alkali metal hydroxide. There also can be present i... | 10/25/1977 |
| 4016011 | Method for heat treatment of high alloy steel in a nonexplosive atmosphere The method of this invention is directed to the heat treatment of an iron-containing article and comprises the steps of subjecting the article to an atmosphere comprising specific amounts of nitrogen, carbon, hydrogen, and carbon monoxide and heating this... | 04/05/1977 |
| 4011110 | Method and apparatus for forming and treating bundles of steel rods A hot steel rod which issues from the last pass of a rod mill is coiled at a level above a bath of molten salt and successive coils are caused to descend in the bath toward a platform on which they accumulate to form a bundle. The coils are out of contact... | 03/08/1977 |
| 3964734 | Apparatus for thermally treating metal components Apparatus for thermally treating metal components. The metal components which are in a partially finished condition are annealed by being placed within a liquid bath which is at a temperature of between 200° and 300° C. The liquid bath is oil and is sit... | 06/22/1976 |
