An old engraving of Gustave Froment’s alphabetical telegraph dials of 1850. It is from a book of the 1890s on discoveries and inventions during the 1800s. Paul Gustave Alexandre Froment (1815–1865) was a highly-skilled manufacturer of precision engineered apparatus. His Alphabetic Telegraph improved on Wheatstone's galvanic dial instrument. The instrument (on the left) is the sending device where an operator turns the clockwork hand to the desired letter, and subsequent words, to send – this is transmitted by battery power to the electro-magnetic receiver (right).
An old engraving of Gustave Froment’s alphabetical telegraph dials of 1850. It is from a book of the 1890s on discoveries and inventions during the 1800s. Paul Gustave Alexandre Froment (1815–1865) was a highly-skilled manufacturer of precision engineered apparatus. His Alphabetic Telegraph improved on Wheatstone's galvanic dial instrument. The instrument (on the left) is the sending device where an operator turns the clockwork hand to the desired letter, and subsequent words, to send – this is transmitted by battery power to the electro-magnetic receiver (right).
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Photo credit: © M&N / Alamy / Afripics
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