Views:4 Author:Site Editor Publish Time: 2017-02-23 Origin:Site
New device of electromagnet
In January 1838, Morse's 3 mile telegraph was a success. In April 1840, the invention was patented
May 24, 1844, is a glorious page in the history of world telecommunications. In the United States congress hall held a grand telegraph communication experiment. Morse turned on the power and sent to Baltimore the first telegraph in human history: "what a miracle God has done!" Morse's telegram finally succeeded!.
In May 24, 1844, it became an internationally recognized telegraph. Morse's telegram is simple, accurate and economical. Soon, his telegraph swept the globe. Today, the Morse code has become a basic communication method of modern telegraph communication.
The invention of the telegraph, opened the prelude to the telecommunications era, creating a human history of the use of electricity to transmit information. Since then, the speed of information transmission is greatly accelerated. "- tick - ring (1 seconds), information around the earth can be loaded with a telegram for people to transfer onto the 7 and a half circle. This speed is ever a communication tool as far behind.
First, the definition of magnetic tile: magnetic tile talking about here is a permanent magnet in a permanent magnet motor is mainly used in the tile-shaped magnets.Second, the magnetic tile classification: magnetic tile depending on their raw materials are mainly three categories:1, ferrite magneti
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The ferrite is made of iron oxide and other ingredients. Generally can be divided into permanent ferrite, soft ferrite and rotating ferrite three.Permanent magnet ferrite, also known as ferrite magnet, is what we usually see the black small magnet. Its composition of raw materials are mainly iron ox