"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 5031050 | Method and system for reproducing monochromatic and color images using ordered dither and error diffusion A method and system for color and monochromatic printing wherein ordered dither and error diffusion processes are combined to provide high quality printed images with good spatial resolution, good gray scale transitions, good low frequency and high freque... | 07/09/1991 |
| 4561541 | Carrier system for photovoltaic cells A tray for testing and storage of photovoltaic e.g. solar cells, is described, enabling processing or testing of such cells to be conducted while supported on the tray. The tray comprises a base having a peripheral rim extending upwardly around the upper ... | 12/31/1985 |
| 4558432 | Non-volatile semiconductor memory circuits Memory circuits having a floating gate transistor as a non-volatile storage element are constructed with a shunt transistor across the floating-gate transistor which in the event of a short circuit between the floating gate and the transistor substrate ca... | 12/10/1985 |
| 4504762 | Buffer for an electron beam collector A buffer is provided for protecting the electron beam collector of a traveling wave tube. The collector comprises an elongated tubular wall, an elongated tubular insulating wall of one type of material, an elongated cylindrical electrode of another type o... | 03/12/1985 |
| 4503483 | Heat pipe cooling module for high power circuit boards A heat pipe cooling module assembly (20) for cooling electronic components (28) includes a plurality of heat pipe modules (22) comprising condenser and evaporator sections (24, 26) and working fluid therein. In a preferred embodiment, each evaporator sect... | 03/05/1985 |
| 4498134 | Segregator functional plane for use in a modular array processor A Segregator Functional Plane capable of dynamically segregating any number, or subset, of a Modular Array Processor's functional planes, either in terms of control or data exchange, or both, from the remainder. This is provided by interspersing a number ... | 02/05/1985 |
| 4493529 | Electromagnetic energy signal-carrying connector having secure strain-relief mechanism An interchangeable multi-channel hermaphroditic fiber optic connector (10) for cables (12), having different numbers of optical fibers (18) and contacts (22) therefor, comprises a connector shell (34) having a specifically configured interior surface (38)... | 01/15/1985 |
| 4480372 | Process of fabricating target for calibrating and testing infrared detection devices Apparatus for calibrating and testing infrared detection devices is provided. The apparatus comprises a substrate which supports a target pattern of dielectric material which is at least partially absorbing to infrared radiation. A heater is used to suppl... | 11/06/1984 |
| 4479367 | Thermal filter The rate of temperature change of an infrared detector produced by a cooling source in a typical Joule-Thomson cryostat (or other cooling device such as closed cycle cooler) is reduced by interposing a thermal filter between the detector and cooling sourc... | 10/30/1984 |
| 4479201 | Serpentine charge coupled device Trade-off between dynamic range and sampling rate in a charge coupled device is virtually eliminated in the serpentine charge coupled device of the present invention. In this device, for each charge packet transferred in a first direction, a plurality of ... | 10/23/1984 |
| 4474343 | Jitter compensating scene stabilizing missile guidance system An improved missile guidance system is provided which automatically compensates for jitter motion of the optical sight of a video tracker. The invention is adapted to receive video data input from an infrared detector or conventional camera. The invention... | 10/02/1984 |
| 4468858 | Tool for separating mated connectors A U-shaped body (12) receives a plunger assembly (31) including a pair of push rods (30) which are rigidly secured together by a beam (32). Springs (36) normally bias the plunger assembly rearwardly so that the rod ends and slides (40) coupled thereto are... | 09/04/1984 |
| 4465833 | Process for preparing ethynylated benzoic acid derivatives A novel ethynylation process is disclosed which provides an expanded series of novel ethylnyl-terminated aromatic compounds having base sensitive substituents and which facilitates the economic preparation of prior art ethynyl-substituted aromatic compoun... | 08/14/1984 |
| 4464134 | Process for inducing perpendicular alignment of liquid crystals Liquid crystals are induced to assume substantially perpendicular alignment on the surfaces of substrates used to fabricate electro-optical device by causing long chain alcohols to react in the vapor phases with surface OH- inherently found on ... | 08/07/1984 |
| 4453802 | Evanescent-wave coupling device A dielectric waveguide is disposed adjacent to a diode array which allows for coupling of energy therebetween. The waveguide has a core section and a cladding section encompassing a core section except in a portion thereof. The diode array is disposed adj... | 06/12/1984 |
| 4453795 | Cable-to-cable/component electrical pressure wafer connector assembly Flexible or conventional wire cables are terminated and interconnected at connectors with only a pressure type contact. Two cable terminations are fabricated from identically chemically milled thin metallic wafers, in which one wafer is plated with metall... | 06/12/1984 |
| 4451766 | Radio frequency laser pumping system An improved laser power supply is disclosed. The invention is designed to provide the high electric field required for starting a laser in addition to the capability of automatically readjusting after laser action is initiated to provide an optimum impeda... | 05/29/1984 |
| 4450489 | Floating disc photoconductive film reader A photoconductive film reader comprises a disc with a read head attached to its bottom surface at an edge point and rotated over the photoconductive film at a sufficiently high velocity so that the read head floats aerodynamically on the film, the read he... | 05/22/1984 |
| 4445138 | Real time dynamic range compression for image enhancement Circuitry is disclosed which generates signals which may be applied to subsequent processing circuitry, such as a display device. Applied signals having a first predetermined number of intensity levels are transformed by the circuitry into signals having ... | 04/24/1984 |
| 4444734 | Process for pumping gases using a chemically reactive aerosol The specification describes a process and apparatus for pumping and removal of unwanted gases by effecting a chemical reaction between the gases and a highly reactive substance which is in the form of aerosol particles, to form a non-volatile, solid react... | 04/24/1984 |
| 4442457 | Charge coupled device focal zoom The charge coupled device focal zoom of the present invention is used in connection with a time delay and integration charge coupled device imager in which a plurality of detectors is scanned at an angular rate ω across a field of view subtended by a sca... | 04/10/1984 |
| 4439910 | Process for fabrication of monolithic transistor coupled electroluminescent diode Modulated signal levels in the range of 1 μV, as is typical for radar returns, can be used to achieve a useful modulated optical signal that can be launched into a fiber optic waveguide for transmission to a remote location for signal processing. The dev... | 04/03/1984 |
| 4438983 | Low friction pivot Low friction pivot 10 has base 12 and pivot pin 16. Bands 22, 24, and 26 are secured to the base 12 on one end and half-wrapped around the cylindrical pivot pin 16 on the other end. The slot 18 in pin 16 is for receiving and clamping that end of the bands... | 03/27/1984 |
| 4432818 | Compositions for use in heat-generating reactions Compositions capable of exothermic reaction in the condensed state are prepared by pressing a mixture of powders comprising a reactive metal such as titanium, boron carbide and, optionally, carbon (e.g., graphite and/or lampblack) and boron. With moderate... | 02/21/1984 |
| 4430608 | Base drive circuit The invention includes a first switching transistor which is actuated by a logic signal. This switching transistor is disposed in a current path from the base of the power transistor. When this switch is actuated, the invention provides a large steady sta... | 02/07/1984 |
| 4428015 | Overcurrent limiter circuit for switching regulator power supplies A circuit is disclosed which provides overcurrent protection for switching regulator power supplies with soft start and soft turn OFF features. The invention includes first means for sensing the current through the switching transistor of the regulator an... | 01/24/1984 |
| 4427569 | Short length ester liquid crystal mixtures and process for making same New nematic liquid crystal (LC) ester mixtures with relatively short average molecular lengths are made by including one or more binary sets of components which have identical, or nearly identical, molecular lengths. Undesirable solids solution phase effe... | 01/24/1984 |
| 4426766 | Method of fabricating high density high breakdown voltage CMOS devices A process of fabricating high density CMOS integrated circuits having conductively interconnected wells. The conductive interconnection is provided by a buried conductor formed in combination with channel stops encircling each of the wells and prior to th... | 01/24/1984 |
| 4426591 | Adaptive comparator An adaptive comparator is provided which compares a signal from a horizon sensor of a satellite to a predetermined threshold to provide a signal indicative of the relative position of a celestial body with improved noise immunity. When the comparator rece... | 01/17/1984 |
| 4424943 | Tracking system An improved line-of-sight commanded missile guidance system is provided which provides the operator of a missile system with the capability of hitting targets which would otherwise be obscured by darkness, smoke, aerosols or poor atmospheric visibility. T... | 01/10/1984 |
| 4419385 | Low temperature process for depositing an oxide dielectric layer on a conductive surface and multilayer structures formed thereby The specification discloses a low temperature process for forming an effective insulating layer of a selected oxide on the surface of a chosen conductive substrate. The oxide so formed has low pinhole density, good surface morphology, and good step covera... | 12/06/1983 |
| 4413671 | Switchable on-off heat pipe A heat pipe (10) includes an evaporator (18) to which a heat generating device is coupled. A heat dissipating condenser 14 is coupled to the evaporator by a thermally insulating tube 46. A capillary is on the interior surfaces of the evaporator, the conde... | 11/08/1983 |
| 4413500 | Tool for forming precisely curved surfaces Precisely curved, lightweight and low-cost reflectors for electromagnetic radiation are fabricated by use of a tool and a process in which a blank is planar stretched by uniformly applied isotropic and radially extending forces followed by deformation of ... | 11/08/1983 |
| 4412355 | Push-button operated electrical power source for an optical communication link In the present invention, a novel magnetic circuit maximizes the electrical power generated upon manual actuation of a push-button switch while minimizing the required weight of the magnetic materials. In particular, the magnetic circuit of the power supp... | 10/25/1983 |
| 4410874 | Large area hybrid microcircuit assembly A ceramic substrate includes a multiplicity of alternately screened and fired conductor and dielectric levels, with interconnections between levels through small via holes in the dielectric layers or alternately by means of crossovers. Thick film resistor... | 10/18/1983 |
| 4409260 | Process for low-temperature surface layer oxidation of a semiconductor substrate The specification discloses a process for forming a coherent, uniform oxide layer on the surface of a selected semiconductor material by heating a wafer of the selected semiconductor material at a temperature of about 750° C. or lower in the presence of ... | 10/11/1983 |
| 4408839 | Twisted nematic liquid light valve with birefringence compensation This invention is a light valve using birefringent nematic liquid crystals in which compensation for residual birefringence is achieved by passing light through two separate liquid crystal layers having their major optical axes twisted oppositely along an... | 10/11/1983 |
| 4407694 | Multi-range doping of epitaxial III-V layers from a single source Silicon doping of GaAs epitaxial layers grown using the AsCl3 /H2 /GaAs:Ga CVD system is accomplished using AsCl3 :SiCl4 liquid doping solutions. These solutions can be readily prepared with reproducible composi... | 10/04/1983 |
| 4402776 | Silicon-containing compositions for self-sustained intermetallic reactions A compacted mixture of heat-generating powders including about 1 to 20 weight percent of silicon results in improved heat transfer to unreacted components or to the ambient during condensed state exothermic reaction to form intermetallic products. Getteri... | 09/06/1983 |
| 4400812 | Laser drive circuits Circuitry which is capable of supplying a short-pulsewidth drive signal to a laser source, or the like. The circuitry comprises a plurality of VMOS transistors arranged to amplify both the voltage and current levels of an applied low-voltage, short-pulsew... | 08/23/1983 |