Electrical telegraphs were point-to-point text messaging systems, primarily used from the 1840s until the late 20th century. It was the first electrical...
77 KB (9,172 words) - 22:40, 13 May 2024
Telegraphy (redirect from Telegraph)
Morse. The electric telegraph was slower to develop in France due to the established optical telegraph system, but an electrical telegraph was put into use...
79 KB (9,817 words) - 21:48, 26 May 2024
A telegraph key or Morse key is a specialized electrical switch used by a trained operator to transmit text messages in Morse code in a telegraphy system...
21 KB (2,832 words) - 21:12, 21 May 2024
constructed. Half a century later, semaphore lines were replaced by the electrical telegraph, which was cheaper, faster, and more private. The line-of-sight distance...
70 KB (8,985 words) - 01:46, 28 May 2024
information technology professionals, especially electrical engineers. It began in 1871 as the Society of Telegraph Engineers. In 2006, it merged with the Institution...
4 KB (339 words) - 03:51, 1 December 2023
Insulator (electricity) (redirect from Telegraph insulators)
An electrical insulator is a material in which electric current does not flow freely. The atoms of the insulator have tightly bound electrons which cannot...
32 KB (4,062 words) - 07:30, 1 March 2024
A telegraph sounder is an antique electromechanical device used as a receiver on electrical telegraph lines during the 19th century. It was invented by...
3 KB (401 words) - 20:50, 28 April 2022
Utility pole (redirect from Telegraph Post)
for telegraph wires and later for telephone wires. Because they are made of granite, the poles last indefinitely. On poles carrying both electrical and...
48 KB (5,669 words) - 11:14, 29 April 2024
The Cooke and Wheatstone telegraph was an early electrical telegraph system dating from the 1830s invented by English inventor William Fothergill Cooke...
25 KB (3,445 words) - 11:44, 19 January 2024
code. Telegraphy usually refers to the electrical telegraph, but telegraph systems using the optical telegraph were in use before that. A code consists...
50 KB (5,984 words) - 16:11, 5 December 2023