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Manoj
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on Wed Jan 09, 2019 11:16 am
hi
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Abhishek
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on Wed Jan 09, 2019 11:22 am
hello...gays
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Aditya992000
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on Thu Jan 10, 2019 1:22 pm
The invention of the telephone was the culmination of work done by many individuals, and led to an array of lawsuits relating to the patent claims of several individuals and numerous companies. The first telephone was invented by Antonio Meucci, but Alexander Graham Bell is credited with the development of the first practical telephone.
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Aditya992000
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on Thu Jan 10, 2019 1:26 pm
The concept of the telephone dates back to the string telephone or lover's telephone that has been known for centuries, comprising two diaphragms connected by a taut string or wire. Sound waves are carried as mechanical vibrations along the string or wire from one diaphragm to the other. The classic example is the tin can telephone, a children's toy made by connecting the two ends of a string to the bottoms of two metal cans, paper cups or similar items.
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daksh007
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on Thu Jan 10, 2019 1:30 pm
The telephone was a large part of modern life in the 20th Century, and still continues a prominent place in society today.
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daksh007
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on Thu Jan 10, 2019 1:31 pm
the telegraph was limited to receiving and sending one message at a time. Bell theorized about the possibility of transmitting multiple messages over the same wire at the same time.
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daksh007
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on Thu Jan 10, 2019 1:31 pm
"harmonic telegraph" was based on the principle that several notes could be sent simultaneously along the same wire if the notes or signals differed in pitch.
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daksh007
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on Thu Jan 10, 2019 1:32 pm
Alexander Graham Bell filed his patent for the telephone, February 14, 1876, Gray's attorney filed a Patent Caveat, which would give him 90 days to file an additional patent application.
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daksh007
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on Thu Jan 10, 2019 1:32 pm
Bell's patent (received 5th in line on February 14) arrived before Gray's patent caveat (received 30th in line), the United States Patent Office decided not to hear the caveat and awarded Bell the patent, #174465.
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daksh007
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on Thu Jan 10, 2019 1:32 pm
Antonio Meucci did not renew his caveat after 1874 and Alexander Graham Bell was granted the patent for in March of 1876.
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faizan khan
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on Thu Jan 10, 2019 1:33 pm
Alexander Graham Bell is most well known for inventing the telephone. He came to the U.S as a teacher of the deaf, and conceived the idea of "electronic speech" while visiting his hearing-impaired mother in Canada. ... When he was eleven, Bell invented a machine that could clean wheat.....
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daksh007
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on Thu Jan 10, 2019 1:33 pm
June 3, 1880, Alexander Graham Bell transmitted the first wireless telephone message on his "photophone."
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meenu007
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on Thu Jan 10, 2019 1:33 pm
The invention of the telephone was the culmination of work done by many individuals, and led to an array of lawsuits relating to the patent claims of several individuals and numerous companies. The first telephone was invented by Antonio Meucci, but Alexander Graham Bell is credited with the development of the first practical telephone.
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daksh007
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on Thu Jan 10, 2019 1:34 pm
June 3, 1880, Alexander Graham Bell transmitted the first wireless telephone message on his "photophone."
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faizan khan
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on Thu Jan 10, 2019 1:34 pm
Alexander Graham Bell is most well known for inventing the telephone.....
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faizan khan
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on Thu Jan 10, 2019 1:34 pm
Bell invented a machine that could clean wheat. He later said that if he had understood electricity at all, he would have been too discouraged to invent the telephone......
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meenu007
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on Thu Jan 10, 2019 1:35 pm
The concept of the telephone dates back to the string telephone or lover's telephone that has been known for centuries, comprising two diaphragms connected by a taut string or wire. Sound waves are carried as mechanical vibrations along the string or wire from one diaphragm to the other.
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meenu007
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on Thu Jan 10, 2019 1:35 pm
The Reis telephone was developed from 1857 on. Allegedly, the transmitter was difficult to operate, since the relative position of the needle and the contact were critical to the device's operation. Thus, it can be called a "telephone", since it did transmit voice sounds electrically over distance, but was hardly a commercially practical telephone in the modern sense.
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faizan khan
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on Thu Jan 10, 2019 1:35 pm
Bell believed that he could solve the problem of sending a human voice over a wire......
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meenu007
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on Thu Jan 10, 2019 1:36 pm
An early voice communicating device was invented around 1854 by Antonio Meucci, who called it a telettrofono. In 1871 Meucci filed a caveat at the US Patent Office[citation needed]. His caveat describes his invention, but does not mention a diaphragm, electromagnet, conversion of sound into electrical waves, conversion of electrical waves into sound, or other essential features of an electromagnetic telephone.
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faizan khan
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on Thu Jan 10, 2019 1:36 pm
Bell had other inventions as well -- his own home had a precursor to modern day air conditioning, he contributed to aviation technology, and his last patent, at the age of 75, was for the fastest hydrofoil yet invented.....
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Aditya992000
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on Thu Jan 10, 2019 1:36 pm
The classic example is the tin can telephone, a children's toy made by connecting the two ends of a string to the bottoms of two metal cans, paper cups or similar items. The essential idea of this toy was that a diaphragm can collect voice sounds from the air, as in the ear, and a string or wire can transmit such collected voice sounds for reproduction at a distance. One precursor to the development of the electromagnetic telephone originated in 1833 when Carl Friedrich Gauss and Wilhelm Eduard Weber invented an electromagnetic device for the transmission of telegraphic signals at the University of Göttingen, in Lower Saxony, helping to create the fundamental basis for the technology that was later used in similar telecommunication devices. Gauss's and Weber's invention is purported to be the world's first electromagnetic telegraph
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faizan khan
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on Thu Jan 10, 2019 1:40 pm
The telephone was a large part of modern life in the 20th Century, and still continues a prominent place in society today......
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faizan khan
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on Thu Jan 10, 2019 2:27 pm
Alexander Graham Bell is most famous for his invention of the telephone.....
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faizan khan
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on Thu Jan 10, 2019 2:27 pm
Where did Alexander Graham Bell grow up?
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