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This is an accepted version of this page This is the latest accepted revision, reviewed on 22 January 2025. Technical and legal issues surrounding the development of the modern telephone For broader coverage of this topic, see History of the telephone. Replica of Antonio Meucci's telettrofono Reis's telephone The invention of the telephone was the culmination of work done by more than one ...
Johann Philipp Reis. Johann Philipp Reis (German:; 7 January 1834 – 14 January 1874) was a self-taught German scientist and inventor. In 1861, he constructed the first make-and-break telephone, today called the Reis telephone.
In phones connected to magneto exchanges, the bell, induction coil, battery, and magneto were in a separate bell box called a "ringer box". In phones connected to common battery exchanges, the ringer box was installed under a desk, or other out of the way place, since it did not need a battery or magneto.
The first person to publicly exhibit a telephone for transmission of articulate speech was A. G. Bell. The first practical commercial telephone for transmission of articulate speech was invented by myself. Telephones used throughout the world are mine and Bell's. Mine is used for transmitting. Bell's is used for receiving. [4]
After the First World War, work began again on the HD-4. Bell's report to the U.S. Navy permitted him to obtain two 350-horsepower (260-kilowatt) engines in July 1919. On September 9, 1919, the HD-4 set a world marine speed record of 70.86 miles per hour (114.04 kilometres per hour), [167] a record which stood for ten years.
Image credits: Isabella Thornton #2 An Early Motorised Scooter. The Autoped was an early vision of today's scooters. This was a personal transport system originally developed in 1915.
After the creation of the telephone itself, Watson invented many accessories for it. Most important was the ringer, which would alert someone not standing by the telephone that a call was being placed. The first version involved a hammer, which had to hit the diaphragm; [5] this was followed by a version employing a buzzer. [6]
Image credits: Leifur311 In 2022, the Sahara saw unusual snowfall in its Algerian territory. However, that wasn't the first time we could see snow, as the phenomenon was also recorded in 2017 ...