Street Light Technical Information
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STREET LIGHTS: Patents from 1894 through 1899 |
Patents are an effective way to understand the development of street lighting in the United States. In this section I have posted patents as I located them. (Early patents are difficult to locate as they were not cross-indexed.)
All patents are listed in order of their filing dates. Click on the patent number or thumbnail to view the entire patent. |
Around 1890 electric street lighting started to dominate. Most street light circuits were high tension series, allowing many lamps to be controlled from a single point. Much of the developments involved devices that would keep the circuit alive if an arc lamp failed or incandescent lamp burned out. Many of these lamps were isolated by autotransformers, however a failed lamp could affect the efficiency of the circuit. Other devices were designed to help protect lineman servicing lamps and changing lamp bulbs.
Meanwhile inventors were still designing improvements to natural gas, acetylene and oil burning streetlamps that were still commonly used where electricity was not readily available. |
Patent No. 0520232
Filing date: January 2, 1894 | |
Patent No. 520996
Filing date: January 9, 1894 | |
Patent No. 519849
Filing date: February 12, 1894 | |
Patent No. 521434
Filing date: March 31, 1894 | |
Patent No. 559066
Filing date: April 29, 1895 | |
Patent No. 563922
Filing date: February 19, 1896 | |
Patent No. 611766
Filing date: March 4, 1898 | |
Patent No. 627239
Filing date: March 31, 1898 | |
Patent No. 0636327
Filing date: May 20, 1899, 1899 | |
Patent No. 634932
Filing date: July 12, 1899, 1899 | |
Patent No. 663768
Filing date: November 27, 1899 |
Please note: This index is a work in progress. If you notice an error or are aware of something that is missing, please feel free to
Email me.
Thanks! |