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  2. Archie Frederick Collins - Wikipedia

    en.wikipedia.org/wiki/Archie_Frederick_Collins

    Collins conducting experiment to use a human brain as a radio wave detector. Collins professional interests focused on radio, an exciting technology which was in its early stage during his lifetime. Heinrich Hertz had discovered radio waves in 1887, and Guglielmo Marconi developed the first practical radiotelegraph transmitters and receivers in ...

  3. Trevor Baylis - Wikipedia

    en.wikipedia.org/wiki/Trevor_Baylis

    The radio, instead of relying on batteries or external electrical source, is powered by the user winding a crank. This stores energy in a spring which then drives an electrical generator . Baylis invented it in response to the need to communicate information about AIDS to the "people of Africa". [ 1 ]

  4. History of radio receivers - Wikipedia

    en.wikipedia.org/wiki/History_of_radio_receivers

    The first radio receivers invented by Marconi, Oliver Lodge and Alexander Popov in 1894–5 used a primitive radio wave detector called a coherer, invented in 1890 by Edouard Branly and improved by Lodge and Marconi. [1] [6] [9] [12] [16] [17] [18] The coherer was a glass tube with metal electrodes at each end, with loose metal powder between ...

  5. Crystal detector - Wikipedia

    en.wikipedia.org/wiki/Crystal_detector

    The crystal detector was the most successful of many detector devices invented during this era. The crystal detector evolved from an earlier device, [40] the first primitive radio wave detector, called a coherer, developed in 1890 by Édouard Branly and used in the first radio receivers in 1894–96 by Marconi and Oliver Lodge.

  6. Édouard Branly - Wikipedia

    en.wikipedia.org/wiki/Édouard_Branly

    It was further developed by Guglielmo Marconi, then replaced about 1907 by crystal detectors. In 1890, Branly [ 5 ] [ 6 ] [ 7 ] demonstrated what he later called the "radio-conductor", [ 8 ] which Lodge in 1893 named the coherer , the first sensitive device for detecting radio waves. [ 9 ]

  7. Timeline of radio - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_radio

    May 1895: After reading about Lodge's demonstrations, the Russian physicist Alexander Popov builds a "Hertzian wave" (radio wave) based lightning detector using a coherer. November 1895: Jagdish Chandra Bose sets up a demonstration of radio microwave at the Town Hall in Calcutta where he ignites gunpowder in a nearby room and rings a bell. [30]

  8. Invention of radio - Wikipedia

    en.wikipedia.org/wiki/Invention_of_radio

    After radio communication was developed Lodge's lecture would become the focus of priority disputes over who invented wireless telegraphy (radio). His early demonstration and later development of radio tuning (his 1898 Syntonic tuning patent) would lead to patent disputes with the Marconi Company. When Lodge's syntonic patent was extended in ...

  9. History of radio - Wikipedia

    en.wikipedia.org/wiki/History_of_radio

    The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of broadcasting.

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