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Thomas Edison's Light Bulb Patent, 1880

Drawing of the incandescent light bulb by Thomas Edison, January 27, 1880. Thomas Edison began serious research into developing a practical incandescent lamp in 1878. Edison filed his first patent application for "Improvement In Electric Lights" on October 14, 1878. After many experiments, first with carbon in the early 1880s and then with platinum and other metals, in the end Edison returned to a carbon filament. The first successful test was on October 22, 1879, and lasted 13.5 hours. Edison continued to improve this design and by November 4, 1879, filed for a US patent for an electric lamp using "a carbon filament or strip coiled and connected...to platina contact wires." Although the patent described several ways of creating the carbon filament including using "cotton and linen thread, wood splints, papers coiled in various ways," Edison and his team later discovered that a carbonized bamboo filament could last more than 1200 hours. In 1880, the Oregon Railroad and Navigation Company steamer, Columbia, became the first application for Edison's incandescent electric lamps (it was also the first ship to execute use of a dynamo).
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Titel:
Thomas Edison's Light Bulb Patent, 1880
Untertitel: Siehe automatische Übersetzung
Drawing of the incandescent light bulb by Thomas Edison, January 27, 1880. Thomas Edison began serious research into developing a practical incandescent lamp in 1878. Edison filed his first patent application for "Improvement In Electric Lights" on October 14, 1878. After many experiments, first with carbon in the early 1880s and then with platinum and other metals, in the end Edison returned to a carbon filament. The first successful test was on October 22, 1879, and lasted 13.5 hours. Edison continued to improve this design and by November 4, 1879, filed for a US patent for an electric lamp using "a carbon filament or strip coiled and connected...to platina contact wires." Although the patent described several ways of creating the carbon filament including using "cotton and linen thread, wood splints, papers coiled in various ways," Edison and his team later discovered that a carbonized bamboo filament could last more than 1200 hours. In 1880, the Oregon Railroad and Navigation Company steamer, Columbia, became the first application for Edison's incandescent electric lamps (it was also the first ship to execute use of a dynamo).
Bildnachweis:
Album / NARA/Science Source
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Model: Nein - Eigentum: Nein
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Bildgröße:
3085 x 4500 px | 39.7 MB
Druckgröße:
26.1 x 38.1 cm | 10.3 x 15.0 in (300 dpi)
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