Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 4378330 | Ductile alloy and process for preparing composite superconducting wire An alloy for the commercial production of ductile superconducting wire is prepared by melting together copper and at least 15 weight percent niobium under non-oxygen-contaminating conditions, and rapidly cooling the melt to form a ductile composite consis... | 03/29/1983 |
| 4346511 | Method for preparing dosimeter for measuring skin dose A personnel dosimeter includes a plurality of compartments containing thermoluminescent dosimeter phosphors for registering radiation dose absorbed in the wearer's sensitive skin layer and for registering more deeply penetrating radiation. Two of the phos... | 08/31/1982 |
| 4309398 | Conversion of alkali metal sulfate to the carbonate A process for converting potassium sulfate to potassium carbonate in which a mixture of potassium sulfate and calcium oxide are reacted at a temperature in the range of between about 700° C. and about 800° C. with a gaseous mixture having a minor amount... | 01/05/1982 |
| 4307997 | Free piston inertia compressor A free piston inertia compressor comprises a piston assembly including a connecting rod having pistons on both ends, the cylinder being split into two substantially identical portions by a seal through which the connecting rod passes. Vents in the cylinde... | 12/29/1981 |
| 4306879 | Chemical logging of geothermal wells The presence of geothermal aquifers can be detected while drilling in geothermal formations by maintaining a chemical log of the ratio of the concentrations of calcium to carbonate and bicarbonate ions in the return drilling fluid. A continuous increase i... | 12/22/1981 |
| 4303864 | Sextupole system for the correction of spherical aberration A means is provided for compensating for spherical aberration in charged particle beam devices. The means includes a sextupole positioned between two focusing lenses.... | 12/01/1981 |
| 4292209 | Ceramic component for MHD electrode A ceramic component which exhibits electrical conductivity down to near room temperatures has the formula: and A is a lanthanide rare earth or yttrium. The component is suitable for use in the fabrication of MHD electrodes or as the current leadout portion ... | 09/29/1981 |
| 4289019 | Method and means of passive detection of leaks in buried pipes A method and means for passive detection of a leak in a buried pipe containing fluid under pressure includes a plurality of acoustic detectors that are placed in contact with the pipe. Noise produced by the leak is detected by the detectors, and the detec... | 09/15/1981 |
| 4286576 | Solar energy thermalization and storage device A passive solar thermalization and thermal energy storage assembly which is visually transparent. The assembly consists of two substantial parallel, transparent wall members mounted in a rectangular support frame to form a liquid-tight chamber. A semitran... | 09/01/1981 |
| 4286165 | Dosimeter for measuring skin dose and more deeply penetrating radiation A personnel dosimeter includes a plurality of compartments containing thermoluminescent dosimeter phosphors for registering radiation dose absorbed in the wearer's sensitive skin layer and for registering more deeply penetrating radiation. Two of the phos... | 08/25/1981 |
| 4282481 | Apparatus for measuring the local void fraction in a flowing liquid containing a gas The local void fraction in liquid containing a gas is measured by placing an impedance-variation probe in the liquid, applying a controlled voltage or current to the probe, and measuring the probe current or voltage. A circuit for applying the one electri... | 08/04/1981 |
| 4278890 | Method and means of directing an ion beam onto an insulating surface for ion implantation or sputtering A beam of ions is directed under control onto an insulating surface by supplying simultaneously a stream of electrons directed at the same surface in a quantity sufficient to neutralize the overall electric charge of the ion beam and result in a net zero ... | 07/14/1981 |
| 4277308 | Count-doubling time safety circuit There is provided a nuclear reactor count-factor-increase time monitoring circuit which includes a pulse-type neutron detector, and means for counting the number of detected pulses during specific time periods. Counts are compared and the comparison is ut... | 07/07/1981 |
| 4271681 | Long-term ice storage for cooling applications A device is providing for cooling a stored material and then for later use of the cold thus stored. The device includes a tank containing a liquid such as water which is frozen by means of a reflux condenser heat pipe.... | 06/09/1981 |
| 4271585 | Method of constructing a superconducting magnet A superconducting magnet designed to produce magnetic flux densities of the order of 4 to 5 Webers per square meter is constructed by first forming a cable of a plurality of matrixed superconductor wires with each wire of the plurality insulated from each... | 06/09/1981 |
| 4272246 | Method and apparatus for chromatographic quantitative analysis An improved apparatus and method for the quantitative analysis of a solution containing a plurality of anion species by ion exchange chromatography which utilizes a single eluent and a single ion exchange bed which does not require periodic regeneration. ... | 06/09/1981 |
| 4269366 | Shuttleless toroid winder A lower support receives a toroid at a winding station with the axis of the toroid aligned with a slot in the support. An upper guide member applies an axial force to hold the toroid against the lower support. A pair of movable jaws carried by an indexing... | 05/26/1981 |
| 4266008 | Method for etching thin films of niobium and niobium-containing compounds for preparing superconductive circuits An improved method of preparing thin film superconducting electrical circuits of niobium or niobium compounds in which a thin film of the niobium or niobium compound is applied to a nonconductive substrate, and covered with a layer of photosensitive mater... | 05/05/1981 |
| 4265716 | Method of winning aluminum metal from aluminous ore Aluminous ore such as bauxite containing alumina is blended with coke or other suitable form of carbon and reacted with sulfur gas at an elevated temperature. For handling, the ore and coke can be extruded into conveniently sized pellets. The reaction wit... | 05/05/1981 |
| 4262739 | System for thermal energy storage, space heating and cooling and power conversion An integrated system for storing thermal energy, for space heating and cong and for power conversion is described which utilizes the reversible thermal decomposition characteristics of two hydrides having different decomposition pressures at the same tem... | 04/21/1981 |
| 4255973 | Digital pressure transducer for use at high temperatures A digital pressure sensor for measuring fluid pressures at relatively high temperatures includes an electrically conducting fiber coupled to the fluid by a force disc that causes tension in the fiber to be a function of fluid pressure. The tension causes ... | 03/17/1981 |
| 4255021 | Optical device with conical input and output prism faces A device for radially translating radiation in which a right circular cylinder is provided at each end thereof with conical prism faces. The faces are oppositely extending and the device may be severed in the middle and separated to allow access to the ce... | 03/10/1981 |
| 4252609 | Crossed-field divertor for a plasma device A divertor for removal of unwanted materials from the interior of a magnetic plasma confinement device includes the division of the wall of the device into segments insulated from each other in order to apply an electric field having a component perpendic... | 02/24/1981 |
| 4253025 | Hand and shoe monitor using air ionization probes A hand and shoe radiation monitor is provided which includes a probe support body defining a plurality of cells, within each cell there being an ionization probe. The support body provides structural strength for protecting the ionization probes from forc... | 02/24/1981 |
| 4253093 | Scram signal generator A scram signal generating circuit for nuclear reactor installations monitors a flow signal representing the flow rate of the liquid sodium coolant which is circulated through the reactor, and initiates reactor shutdown for a rapid variation in the flow si... | 02/24/1981 |
| 4251600 | Method of preparing a sintered lithium aluminate structure for containing electrolyte A porous sintered tile is formed of lithium aluminate for retaining molten lectrolyte within a fuel cell. The tile is prepared by reacting lithium hydroxide in aqueous solution with alumina particles to form beta lithium aluminate particles. The slurry is ... | 02/17/1981 |
| 4248686 | Cross flow electrofilter and method A filter for clarifying carbonaceous liquids containing finely divided solid particles of, for instance, unreacted coal, ash and other solids discharged from a coal liquefaction process is presented. The filter includes two passageways separated by a poro... | 02/03/1981 |
| 4245287 | Method of controlling switching of a multiphase inductor-converter bridge In an inductor-convertor circuit for transferring electrical energy between a storage coil and a load coil using a storage thyristor bridge, a load thyristor bridge, and a set of commutating capacitors, operation is improved by a method of changing the ra... | 01/13/1981 |
| 4244898 | Method of preparing porous, rigid ceramic separators for an electrochemical cell Porous, rigid separators for electrochemical cells are prepared by first calcining particles of ceramic material at temperatures above about 1200° C. for a sufficient period of time to reduce the sinterability of the particles. A ceramic powder that has ... | 01/13/1981 |
| 4244800 | Apparatus for use in rapid and accurate controlled-potential coulometric analysis An apparatus for controlled-potential coulometric analysis of a solution includes a cell to contain the solution to be analyzed and a plurality of electrodes to contact the solution in the cell. Means are provided to stir the solution and to control the a... | 01/13/1981 |
| 4244706 | Process for gasifying carbonaceous material from a recycled condensate slurry Coal or other carbonaceous material is gasified by reaction with steam and oxygen in a manner to minimize the problems of effluent water stream disposal. The condensate water from the product gas is recycled to slurry the coal feed and the amount of addit... | 01/13/1981 |
| 4239598 | Nuclear reactor heat transport system component low friction support system A support column for a heavy component of a liquid metal fast breeder reactor heat transport system which will deflect when the pipes leading coolant to and from the heavy component expand or contract due to temperature changes includes a vertically dispo... | 12/16/1980 |
| 4237692 | Air ejector augmented compressed air energy storage system Energy is stored in slack demand periods by charging a plurality of underground reservoirs with air to the same peak storage pressure, during peak demand periods throttling the air from one storage reservoir into a gas turbine system at a constant inlet p... | 12/09/1980 |
| 4238721 | System and method for charging electrochemical cells in series A battery charging system capable of equalizing the charge of each individual cell at a selected full charge voltage includes means for regulating charger current to first increase current at a constant rate until a bulk charging level is achieved or unti... | 12/09/1980 |
| 4238725 | Apparatus for checking the direction of polarization of shear-wave ultrasonic transducers An apparatus for checking the direction of polarization of shear-wave ultrasonic transducers comprises a first planar surface for mounting the shear-wave transducer, a second planar surface inclined at a predetermined angle to the first surface to generat... | 12/09/1980 |
| 4236965 | Target assembly A target for a proton beam which is capable of generating neutrons for absorption in a breeding blanket includes a plurality of solid pins formed of a neutron emissive target material disposed parallel to the path of the beam and which are arranged axiall... | 12/02/1980 |
| 4237332 | Nonimaging radiant energy direction device A raidant energy nonimaging light direction device is provided. The device includes an energy transducer and a reflective wall whose contour is particularly determined with respect to the geometrical vector flux of a field associated with the transducer.... | 12/02/1980 |
| 4236067 | Automatic sweep circuit An automatically sweeping circuit for searching for an evoked response in an output signal in time with respect to a trigger input. Digital counters are used to activate a detector at precise intervals, and monitoring is repeated for statistical accuracy.... | 11/25/1980 |
| 4234449 | Method of handling radioactive alkali metal waste Radioactive alkali metal is mixed with particulate silica in a rotary drum reactor in which the alkali metal is converted to the monoxide during rotation of the reactor to produce particulate silica coated with the alkali metal monoxide suitable as a feed... | 11/18/1980 |
| 4234408 | Process for hydrocracking carbonaceous material in liquid carrier Solid carbonaceous material is hydrocracked to provide aliphatic and aromatic hydrocarbons for use as gaseous and liquid fuels or chemical feed stock. Particulate carbonaceous material such as coal in slurry with recycled product oil is preheated in liqui... | 11/18/1980 |
