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1815 – Geissler – bio

Johann Geissler was born in German in 1815 and is known for the invention of the Geissler tube. Prior to creating his tubes, in 1855, Geissler developed a new way to use mercury displacement in a vacuum pump that was more efficient than previous pump designs. The new low pressure created by the mercury pump […]

1875 – Crookes’ tube

English physicist William Crookes expanded on the vacuum tube research done by Geissler, Plucker and Hittorf and created a tube with a greater vacuum that became the new standard. In 1876 Eugen Goldstein called the display inside the tube, “cathode rays” and the tubes became known as cathode ray tubes, which was eventually abbreviated to […]