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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 6682612 | Method of heat treatment of wire A method of heat treatment of wire including cooling the wire stock immediately after the stock leaves the rolling heat region to a temperature below the starting temperature of martensite formation and, thereafter, forming wire coils.... | 01/27/2004 |
| 6291079 | Method for manufacturing self-hardening steel wire, reinforcing wire and application to a flexible duct The invention concerns a method for manufacturing steel wire comprising the following steps: manufacturing a reinforcing wire of sizeable length by rolling or hot wire drawing from steel containing the following elements: 0.18% to 0.45 % C, 0.4% to 1.8% M... | 09/18/2001 |
| 6264769 | Coil area for in-line treatment of rolled products Apparatus for the production and heat treatment of coiled elongated metal product of relatively small cross section, such as rods, bars and wire-rod material, is described. The elements required for the conduct of a variety of heat treatments can be perfo... | 07/24/2001 |
| 6187118 | Method for heat-treating steel work pieces A method of heat-treating a work piece of high-alloy steel by hardening involves relatively briefly annealing the work piece before hardening, followed by cooling the work piece. The brief annealing that is performed before the actual hardening and the en... | 02/13/2001 |
| 6174390 | Spiral parts heat treatment apparatus and method, and spiral part A spiral parts heat treatment apparatus includes a first guide, a transfer unit, a second guide, and a controller. The first guide has a carrier portion that continuously conveys the manufactured spiral parts carried thereon in a longitudinal direction. T... | 01/16/2001 |
| 5983990 | Machine for warming and spraying paint or viscous fluids A machine for warming and spraying paint comprising a water cooled internal combustion engine, a pump for pumping the paint, a power transfer means linking the engine drive linkage to the pump drive linkage, a heat exchange chamber having an interior chan... | 11/16/1999 |
| 5958158 | Method of manufacturing hot-worked elongated products, in particular bar or pipe, from high alloy or hypereutectoidal steel The invention relates to a process for producing hot-worked elongated products, such as bars or tubes, from high-alloy or hypereutectoid steel in which a feedstock is heated to a deformation temperature and undergoes at least one deformation step. Followi... | 09/28/1999 |
| 5783000 | Method for heat treatment of steel, and products of steel A method for heat-treating steel, primarily strip-like or rod-like steel material, such as steel strip, steel sheet, steel rod or steel wire which have been rolled and heated in an oven or furnace to a surface temperature above about 900 degrees C. and th... | 07/21/1998 |
| 5776268 | Process for manufacturing surgical needles A process for progressively manufacturing cutting edge needles or wire members. Needle blanks or wire blanks are cut from a roll of wire and mounted to a carrier strip. The carrier strip and needles are moved through a succession of coining dies and at le... | 07/07/1998 |
| 5614039 | Argon employing heat treating process Method for heat treating a metal in which argon gas is selectively injected into the cooling zone of a heat treating apparatus when the temperature therein is above the level at which significant nitriding will occur.... | 03/25/1997 |
| 5578150 | Heat treatment process for wire rods A conveyor moves forward an unconcentrically spiralled loose coil of steel wire rod having a temperature not lower than Ar3 into a retention bath of molten salt for heat treatment. Just before entering the retention bath, the coil is quenched b... | 11/26/1996 |
| 5542995 | Method of making steel strapping and strip and strapping and strip A method of making flat steel strapping or strip from rods, bars or slit steel includes the steps of heating a piece of steel to an elevated temperature greater than the upper critical temperature, hot rolling the steel and quenching the rolled steel from... | 08/06/1996 |
| 5423924 | Method for the heat treatment of at least one metal wire with heat-transfer plates A method and for the heat treatment of at least one metal wire (1), chararized by passing the wire (1) within at least one pair of thermal transfer plates (2, 2a, 2b) between two grooves (8, 8a, 8b) made in the two plates (2, 2a, 2b) of each of said pair... | 06/13/1995 |
| 5146759 | Method for rapid direct cooling of a hot-rolled wire rod A method for the rapid, direct cooling of a hot-rolled wire rod comprising the steps: transporting a hot-rolled and coiled wire rod on a conveyor, the wire rod being in a form of continuous series of loops; and blasting an air-water mist to the wire rod a... | 09/15/1992 |
| 4872923 | Die-less drawing method and apparatus Method and apparatus for heating, cooling and stretching a metal specimen as it is being elongated, according to a temperature curve selected to provide a finished product having a predetermined microstructive, ultimate tensile strength, yield point and c... | 10/10/1989 |
| 4830684 | Process for heat treating a carbon steel wire A process for heat treating a carbon steel wire to obtain a fine pearlite structure is characterized by the following steps: (a) cooling the wire until the wire reaches a given temperature which is below the AC1 transformation temperature; (b) ... | 05/16/1989 |
| 4770722 | Methods for heat treatment of steel rods A method and apparatus for the direct heat treatment of a medium- to high-carbon steel rod in which the formation of martensite is prevented, even if the starting billet contains segregation. A hot-rolled rod is transported on a conveyor in the form of a ... | 09/13/1988 |
| 4767472 | Method for the treatment of steel wires Steel wires W are `patented` by heating in a furnace 6 to the austenitization temperature and then cooled to a range in which austenite is transformed into pearlite by passing the wires through a water cooling device 1. This cooling device comprises a tan... | 08/30/1988 |
| 4704166 | Process for the production of medium carbon steel wire rod In the production of medium carbon steel wire rod, upon leaving the hot rolling mill, the rod is cooled in two phases. The first phase is operative as the rod moves at end-of-rolling speed along a cooling line disposed between the finishing block and feed... | 11/03/1987 |
| 4604149 | Process for hardening elongate metal elements A process for hardening elongate metal elements having a circular section, according to which the said elements are made to advance through a heating station and a hardening station by a conveyer device formed by a succession of advancement and support de... | 08/05/1986 |
| 4469534 | Method for controlled temperature accumulator for elongated materials An apparatus and method of storing a great length of continuously advancing elongate metallic material in a temperature controlled accumulator (40, 50) is disclosed to enable greater line speeds by exposing a greater length of material to the heat treatme... | 09/04/1984 |
| 4468262 | Method of cooling hot-rolled wire rods A method of cooling a rod delivered successively from a hot rolling mill while transferring it. The method involves coiling the rod into rings, forming the rings into a densely packed coil in which the centers of the rings are slightly offse, conveying th... | 08/28/1984 |
| 4404043 | Method of and an apparatus for continuous heat treatment of separated elongated metallic material In a method for continuous heat treatment of separated elongated metallic material said material is conveyed stepwise through a single furnace chamber. Said furnace chamber comprises a heating section and an adjacent holding section. In the heating sectio... | 09/13/1983 |
| 4401481 | Steel rod rolling process, product and apparatus A process for rolling steel rod is provided whereby rolling rod at delivery speeds in excess of 15,000 fpm and cooling same after laying it in spread-out ring form on a conveyor is made feasible with less risk of cobbles and improved rod quality especiall... | 08/30/1983 |
| 4369645 | Method and apparatus for cooling wire rod A method and apparatus are provided for cooling wire rod and wire in which wire rod and wire leaving the last roll block of a finishing mill is delivered to a first portion of a cooling path for the cooling of wire or wire which slopes downwardly from a l... | 01/25/1983 |
| 4362040 | Method and apparatus for the controlled cooling of hot rolled steel rods A method and apparatus for the controlled cooling of a hot rolled steel rod. A hot rolled steel rod issued from a final stand of mill train is rapidly cooled, and then formed into a coil. The coiled rod is transported in a generally horizontal direction w... | 12/07/1982 |
| 4332630 | Continuous cooling of low carbon steel wire rod Low carbon steel (Cࣘ0.4%) wire rod at 800°-880° C. f a rolling mill is deposited in loose turns on a conveyor where it is slowly cooled until the austenite to ferrite transformation is at least 80% complete and the ferrite grain size is at lest ASTM ... | 06/01/1982 |
| 4321098 | Continuous hardening of high speed steel A wire of high speed steel is hardened and straightened by a continuous method wherein an annealed high speed steel wire is subjected to steps of austenitizing; quenching; tempering and cooling; and then tempering and cooling under tension. The hardened a... | 03/23/1982 |
| 4280857 | Continuous draw anneal system An apparatus and method of continuously drawing and annealing wire in a slip mode. The method comprises the steps of directing a wire successively through a plurality of drawing dies of a continuous wire drawing machine, and from the next to the last die ... | 07/28/1981 |
| 4087295 | Mechanical and thermal treatment of steel wire A process is described whereby steel wire is made into killed twisted strand or cord having essentially no retained tensile, bending or torsional stresses which comprises twisting a plurality of steel wires to form a strand or cord, austenitizing and simu... | 05/02/1978 |
| 4046599 | Processing wire rod Steel wire rod leaving the last stand of a rolling mill is quenched to between 850° C and a temperature corresponding to the nose of the curve representing the start of the transformation of austenite to ferrite-pearlite plotted with respect to time and ... | 09/06/1977 |
| 4029524 | Heat treating process for a rod within a fluidized bed A heat treating process for a rod by the use of a fluidized bed consisting of alumina, silicon sand, zircon sand, and the like, is disclosed for adjusting the strength of the rod due to its cooling within the fluidized bed. While prior art heat treatment ... | 06/14/1977 |
| 4026731 | Method for heat treating wire Cooling by a gas coolant of carbon steel wire coils which have been heated to above the austenizing temperature of the wire is controlled to rapidly quench cool the wire coils to within a selected critical range of temperatures which results in a desired ... | 05/31/1977 |
| 4003763 | Method of and plant for patenting steel wire bundles Method of and plant for patenting steel wire bundles, according to which a cooling vat is heated by a heating fluid to a temperature of e.g. 500° C considered as cooling temperature for patented steel wire bundles. Into this cooling vat is then introduce... | 01/18/1977 |
| 3930900 | Process for cooling hot rolled steel rod Apparatus for conveying an elongated hot-rolled steel rod in off-set ring form on a conveyor through a series of cooling chambers. Each chamber comprises a stationary lower section and a removable cover section, the interior walls of each being heat refle... | 01/06/1976 |
