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  • Early Telegraph and Electrical Manufacturers
    An early list of telegraph and electrical manufacturers T hose who have had the good fortune to come into possession of an early make of telegraph relay, sounder or key are, in many instances, at a loss in trying to establish the date of manufacture of their prize While, in most cases, the instrument bears the name of the manufacturer, there is no clue as to the year in which it was made
    PART I 50 THE ORIGINAL MORSE TELEGRAPH KEY was actually a notched piece of metal called a Portrule It was pulled along and the parts of the metal that were not notched made contact with another piece of metal, completed the electrical circuit, and produced the dots and dashes of the Morse Code
  • St Louis V Western Union Telegraph Company PDF Download
    Early telegraph and electrical manufacturers, an early list of telegraph and electrical manufacturers St louis, missouri (mo) profile: population, maps, real , st louis tourist attractions: anheuser busch in st louis, missouri; art and entertainment district grand center in saint louis st louis mo g rand art music theater Electrical telegraph wikipedia, an electrical telegraph is a telegraph
  • Telegraph-History
    Early Manufacturers of Telegraph and Electrical Apparatus An article and web site that lists U S telegraph manufacturers that were in operation prior to 1918 Also included are over 415 manufacturer ads with notes about the companies and people associated with them
  • Early Telegraph Registers - SparkMuseum
    John Dean Caton was an associate justice of the Supreme Court in Illinois and later became resident of the Illinois and Mississippi telegraph line and a telegraph manufacturer This is a very early example from the Caton shop from the early 1850's
  • Morse Code the Telegraph - Inventions - HISTORY. com
    Developed in the 1830s and 1840s by Samuel Morse (1791-1872) and other inventors, the telegraph revolutionized long-distance communication It worked by transmitting electrical signals over a wire laid between stations In addition to helping invent the telegraph, Samuel Morse developed a code
    2990 * FIRE ALARM KEY LIGHTNING ARRESTOR:(15KB) Many interesting and early keys were used in early fire-alarm systems in which the location of the fire was transmitted as a series of short electrical pulses and long or short spaces The signals were received as a series of bell rings in every fire house in the city Fire alarm keys such as this one are often mistaken for telegraph keys
  • Glass Insulator Manufacturers - GLASS BOTTLE MARKS - Welcome
    GLASS INSULATOR MANUFACTURERS General Overview on Insulators Long before the modern era of computers, cellphones, smartphones, fiber-optic cables and the internet, long distance electric electronic communication consisted primarily of the telegraph and telephone

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