Who invented the first functional telephone

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In these videos, Britannica explains a variety of topics and answers frequently asked questions. • Check out these retro videos from Encyclopedia Britannica’s archives. • In Demystified, Britannica has all the answers to your burning questions. • In #WTFact Britannica shares some of the most bizarre facts we can find. • In these videos, find out what happened this month (or any month!) in history. • Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. • While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. • Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. • Britannica Presents Earth’s To-Do List for the 21st Century. Learn about the major environmental problems facing our planet and what can be done about them! • Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space! On February 14, 1876, Alexander Graham Bell applied for a U.S. patent for the telephone. On March 7, 1876, Bell was awarded U.S. patent 174,465. This patent is often referred to as the most valuable ever issued by the U.S. Patent Office, as it described not only the telephone instrument but also the concept of a t...

Learn how Alexander Graham Bell went to revolutionize telegraphy but instead invented the telephone Alexander Graham Bell, (born March 3, 1847, Edinburgh, Scotland—died August 2, 1922, Beinn Bhreagh, Cape Breton Island, Alexander (“Graham” was not added until he was 11) was born to Alexander Melville Bell and Eliza Grace Symonds. His mother was almost deaf, and his father taught Inventors and Inventions One of Bell’s students was While pursuing his teaching profession, Bell also began researching methods to transmit several A group of investors led by Gardiner Hubbard wanted to establish a federally chartered telegraph company to compete with Western Union by contracting with the Post Office to send low-cost telegrams. Hubbard saw great promise in the harmonic telegraph and backed Bell’s experiments. Bell, however, was more interested in transmitting the human voice. Finally, he and Hubbard worked out an agreement that Bell would devote most of his time to the harmonic telegraph but would continue developing his telephone concept. Graphophone By that time, Bell had developed a growing interest in the Volta Laboratory, an institution devoted to studying Bell undertook two other noteworthy research projects at the Volta Laboratory. In 1880 he began research on using Bell’s other major undertaking was the development of an electrical bullet probe, an early version of the metal detector, for surgical use. The origin of this effort was the shooting of U.S. President In Septembe...

On February 14, 1876, Alexander Graham Bell applied for a U.S. patent for the telephone. On March 7, 1876, Bell was awarded U.S. patent 174,465. This patent is often referred to as the most valuable ever issued by the U.S. Patent Office, as it described not only the telephone instrument but also the concept of a telephone system. Learn how Alexander Graham Bell went to revolutionize telegraphy but instead invented the telephone telephone, an instrument designed for the This article describes the functional components of the modern telephone and traces the historical development of the telephone instrument. In addition it describes the development of what is known as the see the articles see the articles The telephone instrument The word telephone, from the Greek roots tēle, “far,” and phonē, “sound,” was applied as early as the late 17th century to the string telephone familiar to children, and it was later used to refer to the megaphone and the speaking tube, but in modern usage it refers solely to electrical devices Working components of the telephone As it has since its early years, the telephone instrument is made up of the following functional components: a power source, a switch hook, a dialer, a ringer, a transmitter, a The switch hook connects the telephone instrument to the direct current supplied through the local loop. In early telephones the receiver was hung on a hook that operated the switch by opening and closing a metal contact. This system is still common,...

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In these videos, Britannica explains a variety of topics and answers frequently asked questions. • Check out these retro videos from Encyclopedia Britannica’s archives. • In Demystified, Britannica has all the answers to your burning questions. • In #WTFact Britannica shares some of the most bizarre facts we can find. • In these videos, find out what happened this month (or any month!) in history. • Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. • While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. • Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. • Britannica Presents Earth’s To-Do List for the 21st Century. Learn about the major environmental problems facing our planet and what can be done about them! • Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space! Learn how Alexander Graham Bell went to revolutionize telegraphy but instead invented the telephone Alexander Graham Bell, (born March 3, 1847, Edinburgh, Scotland—died August 2, 1922, Beinn Bhreagh, Cape Breton Island, Alexander (“Graham” was not added until he was 11) was born to Alexander Melville Bell and Eliz...

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In these videos, Britannica explains a variety of topics and answers frequently asked questions. • Check out these retro videos from Encyclopedia Britannica’s archives. • In Demystified, Britannica has all the answers to your burning questions. • In #WTFact Britannica shares some of the most bizarre facts we can find. • In these videos, find out what happened this month (or any month!) in history. • Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. • While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. • Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. • Britannica Presents Earth’s To-Do List for the 21st Century. Learn about the major environmental problems facing our planet and what can be done about them! • Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space! On February 14, 1876, Alexander Graham Bell applied for a U.S. patent for the telephone. On March 7, 1876, Bell was awarded U.S. patent 174,465. This patent is often referred to as the most valuable ever issued by the U.S. Patent Office, as it described not only the telephone instrument but also the concept of a t...

Learn how Alexander Graham Bell went to revolutionize telegraphy but instead invented the telephone Alexander Graham Bell, (born March 3, 1847, Edinburgh, Scotland—died August 2, 1922, Beinn Bhreagh, Cape Breton Island, Alexander (“Graham” was not added until he was 11) was born to Alexander Melville Bell and Eliza Grace Symonds. His mother was almost deaf, and his father taught Inventors and Inventions One of Bell’s students was While pursuing his teaching profession, Bell also began researching methods to transmit several A group of investors led by Gardiner Hubbard wanted to establish a federally chartered telegraph company to compete with Western Union by contracting with the Post Office to send low-cost telegrams. Hubbard saw great promise in the harmonic telegraph and backed Bell’s experiments. Bell, however, was more interested in transmitting the human voice. Finally, he and Hubbard worked out an agreement that Bell would devote most of his time to the harmonic telegraph but would continue developing his telephone concept. Graphophone By that time, Bell had developed a growing interest in the Volta Laboratory, an institution devoted to studying Bell undertook two other noteworthy research projects at the Volta Laboratory. In 1880 he began research on using Bell’s other major undertaking was the development of an electrical bullet probe, an early version of the metal detector, for surgical use. The origin of this effort was the shooting of U.S. President In Septembe...

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In these videos, Britannica explains a variety of topics and answers frequently asked questions. • Check out these retro videos from Encyclopedia Britannica’s archives. • In Demystified, Britannica has all the answers to your burning questions. • In #WTFact Britannica shares some of the most bizarre facts we can find. • In these videos, find out what happened this month (or any month!) in history. • Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. • While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. • Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. • Britannica Presents Earth’s To-Do List for the 21st Century. Learn about the major environmental problems facing our planet and what can be done about them! • Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space! On February 14, 1876, Alexander Graham Bell applied for a U.S. patent for the telephone. On March 7, 1876, Bell was awarded U.S. patent 174,465. This patent is often referred to as the most valuable ever issued by the U.S. Patent Office, as it described not only the telephone instrument but also the concept of a t...

Learn how Alexander Graham Bell went to revolutionize telegraphy but instead invented the telephone Alexander Graham Bell, (born March 3, 1847, Edinburgh, Scotland—died August 2, 1922, Beinn Bhreagh, Cape Breton Island, Alexander (“Graham” was not added until he was 11) was born to Alexander Melville Bell and Eliza Grace Symonds. His mother was almost deaf, and his father taught Inventions: From Bayonets to Jet Engines One of Bell’s students was While pursuing his teaching profession, Bell also began researching methods to transmit several A group of investors led by Gardiner Hubbard wanted to establish a federally chartered telegraph company to compete with Western Union by contracting with the Post Office to send low-cost telegrams. Hubbard saw great promise in the harmonic telegraph and backed Bell’s experiments. Bell, however, was more interested in transmitting the human voice. Finally, he and Hubbard worked out an agreement that Bell would devote most of his time to the harmonic telegraph but would continue developing his telephone concept. Graphophone By that time, Bell had developed a growing interest in the Volta Laboratory, an institution devoted to studying Bell undertook two other noteworthy research projects at the Volta Laboratory. In 1880 he began research on using Bell’s other major undertaking was the development of an electrical bullet probe, an early version of the metal detector, for surgical use. The origin of this effort was the shooting of U.S. Presi...

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In these videos, Britannica explains a variety of topics and answers frequently asked questions. • Check out these retro videos from Encyclopedia Britannica’s archives. • In Demystified, Britannica has all the answers to your burning questions. • In #WTFact Britannica shares some of the most bizarre facts we can find. • In these videos, find out what happened this month (or any month!) in history. • Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. • While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. • Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. • Britannica Presents Earth’s To-Do List for the 21st Century. Learn about the major environmental problems facing our planet and what can be done about them! • Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space! On February 14, 1876, Alexander Graham Bell applied for a U.S. patent for the telephone. On March 7, 1876, Bell was awarded U.S. patent 174,465. This patent is often referred to as the most valuable ever issued by the U.S. Patent Office, as it described not only the telephone instrument but also the concept of a t...

Learn how Alexander Graham Bell went to revolutionize telegraphy but instead invented the telephone Alexander Graham Bell, (born March 3, 1847, Edinburgh, Scotland—died August 2, 1922, Beinn Bhreagh, Cape Breton Island, Alexander (“Graham” was not added until he was 11) was born to Alexander Melville Bell and Eliza Grace Symonds. His mother was almost deaf, and his father taught A History of Everyday Technology in 68 Quiz Questions One of Bell’s students was While pursuing his teaching profession, Bell also began researching methods to transmit several A group of investors led by Gardiner Hubbard wanted to establish a federally chartered telegraph company to compete with Western Union by contracting with the Post Office to send low-cost telegrams. Hubbard saw great promise in the harmonic telegraph and backed Bell’s experiments. Bell, however, was more interested in transmitting the human voice. Finally, he and Hubbard worked out an agreement that Bell would devote most of his time to the harmonic telegraph but would continue developing his telephone concept. Graphophone By that time, Bell had developed a growing interest in the Volta Laboratory, an institution devoted to studying Bell undertook two other noteworthy research projects at the Volta Laboratory. In 1880 he began research on using Bell’s other major undertaking was the development of an electrical bullet probe, an early version of the metal detector, for surgical use. The origin of this effort was the shooting ...