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Cathode Ray Tube: Cathode-Ray Tubes
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The cathode-ray tube (CRT) television screen is the oldest display technology, with a history extending back to the late 1890s. It is still difficult to better, although its considerable depth, weight, and high voltage requirements are disadvantages.
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The German team of Heinrich Geissler (1815-1879) and Julius Plucker (1801-1868) pioneered the study of cathode-ray tubes. Geissler was a skilled glassworker, employed by the University of Bonn (Germany) as a maker of scientific instruments. While at the university he met Plucker, then a young professor. Sometime around 1855, Plucker convinced Geissler to design an apparatus for evacuating (completely emptying) a glass tube. Geissler did just that. He constructed a hand-crank mercury pump that could remove most of the air from a tube.
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Data on display: the cathode-ray tube, which dominated display technology for half a century, has given way to flat-panel displays. All current flat-panel display technologies involve a degree of compromise, but new concepts leaving the laboratory promise better visual images and lower power consumption. (Technology).
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Probably the most important research using cathode-ray tubes was performed in 1875 by the English physicist William Crookes. In order to confirm the experiments of Plucker and Hittorf, Crookes designed his own vacuum tube from which the air could be almost completely removed. So great an improvement over Geissler's tubes were these that the "Crookes tube" quickly became the standard vacuum tube for use in scientific experiments. Crookes continued Plucker's experiments with magnetic fields, confirming the glow was easily deflected. He ... installed tiny vanes within his tubes. As the current was applied the vanes would turn slightly (it was as if they were blown by a gust of wind).
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Cathode-ray tubes use an interesting and varied assemblage of raw materials. In many cases, it is the raw materials, not the design or manufacturing process, that determine the performance characteristics of the finished product.
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Please use this form to contact an attorney at Lieff Cabraser regarding the antitrust lawsuit against cathode-ray tube manufacturers. Lieff Cabraser agrees to protect your name and all confidential information you submit against disclosure, publication or unauthorized use to the full extent under the law.
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