General Electric

About: General Electric is a company organization based out in Boston, Massachusetts, United States. It is known for research contribution in the topics: Turbine & Rotor (electric). The organization has 76365 authors who have published 110557 publications receiving 1885108 citations. The organization is also known as: General Electric Company & GE.

Brightness control system for crt video display

Abstract: A video brightness control system for high performance CRT displays including a buffer amplifier for receiving high speed video information and applying it to a gain control variable resistor serving as a contrast control. An ambient light sensor drives a nonlinear amplifier to provide an ambient light signal which is in proportion to the logarithm of the ambient light level over a wide range. A manual brightness control potentiometer is adjustable to provide a constant brightness signal. The video information signal, the ambient light signal, and the manual brightness control signal are added together by a summing device, with the resultant signal approximating a logarithmic characteristic. The output of the summing device is applied to a gamma correction amplifier which drives a video driver amplifier, the video amplifier, in turn, drives the CRT. The gamma correction amplifier and video driver in combination with the video transfer function of the CRT approximates an exponential transfer function, thereby creating CRT screen brightness which is an antilogarithmic function of the total video signal appearing at the gamma correction amplifier input. This results in automatic brightness control as a function of ambient light level, minimum interaction between brightness and contrast controls, and a gamma characteristic which provides a reasonable approximation to the variation of brightness difference threshold of the eye.

Tailoring the texture of IN738LC processed by selective laser melting (SLM) by specific scanning strategies

Abstract: Selective laser melting (SLM) is an emerging technology of additive manufacturing, which is used to directly produce metallic parts from thin powder layers. This study aims at correlating laser scanning strategies with the resulting textures and corresponding anisotropy of the elastic behavior of bulk materials. Tensile test specimens made of the γ’-containing Ni-base superalloy IN738LC were built with the loading direction oriented either parallel (z-specimens) or perpendicular to the build-up direction (xy-specimens). Their bulk mechanical properties were determined at room temperature and at 850 °C. Specimens were investigated in the ‘as-built’ condition and after recrystallization heat treatment. SEM-based electron backscatter diffraction (EBSD) was applied to measure their crystallographic preferred orientations (texture) and to correlate the anisotropy of Young's modulus with the texture of the material. It is shown that the applied laser scanning strategies allow to tailor the crystallographic texture locally. The possibility to switch from transverse anisotropic to transverse isotropic properties and reverse is demonstrated for triple layered tensile samples. A recrystallization heat treatment reduces the degree of crystallographic texture and thus the elastic anisotropy by abundant annealing twinning. Predictions of Young's modulus calculated from the measured textures compare well with the data from tensile tests.

Gaseous electric discharge device

Abstract: 363,092. Discharge lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent-Treuhand-Ges. f³r Elektrische Gluhlampen; 11, Ehrenbergstrasse, Berlin.) Nov. 17, 1930, No. 34541. Convention date, Jan. 11. [Class 39 (i).] A solid electrode luminous electric discharge tube for use on A.C. and having a filling of one or more vapours of metals solid at ordinary temperatures or of a mixture of one or more easily condensible vapours and a gas, is provided with short connecting parts e in front of each of the electrode chambers b, said parts e having a higher temperature than the main part a of the tube when it is in operation in order to prevent condensation of vapour in the electrode chambers b. The connecting parts are maintained at the higher temperature by constricting the tube at e, surrounding it with a heat insulating jacket, or a heating winding or heating it with a flame at e. The condensible vapour may be that of sodium with or without one or more common or rare gases and electron emitting hot electrodes may be used which may be preheated to incandescence by a heating wire wound round or embedded in them.

System and method for electric vehicle charging and billing using a wireless vehicle communication service

Abstract: A vehicle charging station for use in transmitting charging power to an electric vehicle for use in charging the vehicle is configured to communicatively couple to the electric vehicle via a network connection to a wireless network provider and electrically couple to the electric vehicle via a connector. Vehicle charging station is further configured to receive a unique identifier from the electric vehicle via the network connection, deliver a quantity of electrical charging power to the electric vehicle via the connector, and meter the quantity of electrical charging power delivered to the electric vehicle.