Thomas A. Edison worked tirelessly on his incandescent light bulb which he finally perfected in 1879. This remarkable invention did away with open flames and their inherent danger to start all kinds of fires. It was also the first necessary step to replace the portable candlestick or candle light with a battery powered light. First attempts were made with wet-cell batteries but for obvious reasons the liquid acid used in such “portable” lights proved to be impractical. Another necessary invention had to be made to make the portable light practical; the dry-cell battery. French inventor Georges Lionel Leclanche invented the Zinc-Carbon dry cell BATTERY and protected his invention with US Patent no. 64,113 which issued on April 23, 1867.
Several improvements were necessary to get to the point were Zinc-Carbon dry-cell batteries were save to use in portable lights, read more>>
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Grace Roger Cooper´s claim that this machine was actually manufactured despite the fact that no machine had ever been found is now confirmed. In her book, former curator of the Textile Division of the Smithsonian Institution in Washington, DC, made this claim based on her observation that two different inventors, independent from each other, used this attractive machine as model for their application for a patent for an improved feeding mechanism.
One of the inventors was George Hensel of New York City for which patent 24,737 was issued on July 12, 1859. Since Hensel´s patent application was for an improvement in the feed, there was no need to put a highly decorative head unless such a machine was commercially available. The patent specifications merely state that the head is “ornamented.”
Sidney Parker of Sing Sing, New York, also used a “Lady” or “Cora Munro” head and was issued patent number 24,780, on the same date as the Hensel patent. Parker´s patent also covered an improved feeding mechanism.
The design of this machine is based on a character in James Fenimore Cooper´s Last of the Mohicans, called “Cora Munro,” read more>>
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Only 13 were ever built, none were believed to be extant till this Yale And Towne Sextuple or model EE Safe-Time-Lock was found! This is the only extant safe-time-lock with a redundancy of five clock movements!
This time-lock is based on Emory Stockwell’s patent with number 363’920, issued on May 31, 1887, read more>>
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