History Of Telephone For Kids
The telephone emerged from the making and successive improvements of the electrical telegraph in 1804 spanish polymath and scientist francisco salva campillo constructed an electrochemical telegraph.
History of telephone for kids. Created using powtoon free sign up at htt. The mobile phone can be used to communicate over long distances without wires. Later telephone exchanges allowed connecting to other telephones.
An electromagnetic telegraph was created by baron schilling in 1832. These instruments change information into signals that are sent over long distances through wires or through optical fibers or by radio waves or satellite. Telecommunications is the word we use for the science and technology of sending messages using electricity.
Census gov schools history page 2 the history o the telephone studnt sion 1. With a telephone a person can talk almost instantly with someone on the other side of the world. Those inventors were alexander graham bell and elisha gray.
During the 20th century the machines that made the connections were automated. Early telephones were wired directly to each other and could only talk to the phone that they were connected to. But it wasn t until 1876 when a man named alexander graham bell pictured on the previous page patented the telephone and was allowed to start selling it.
Both devices were registered at the patent office within hours of each other. Learn about the man credited with the invention of the first practical telephone with our alexander graham bell facts for kids. Images animations and music credit to powtoon.
Alexander graham bell facts. A mobile phone also known as a wireless phone cell phone or cellular telephone is a very small portable radio telephone. History of the telephone the telephone.
This includes the telegraph telephone radio television and computers. This is a simple powerpoint with pictures of telephones through the ages and a few notes to accompany the slides. The telephone is a very common device for communicating over a distance.
During the 1870 s two well known inventors both independently designed devices that could transmit sound along electrical cables. A timeline video sharing the history of telephones for kids. Most telephones are linked to each other by wires.
Alexander graham bell was the first person to patent the telephone in 1876. The first working telegraph was built by the english inventor francis ronalds in 1816 and used static electricity. Others such as cell phones are connected by invisible radio waves that travel through the air.
It works by communicating with a nearby base station also called a cell site which connects it to the main phone network.
