Who invented alexander graham bell

He figured out how to transmit a simple current first, and received a patent for that invention on March 7, Five days later, he transmitted actual speech. Sitting in one room, he spoke into the phone to his assistant in another room, saying the now famous words: "Mr. Watson, come here. I need you. 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.

Bell was committed to the advancement of science and technology. As such he took over the presidency of a small, almost unheard-of, scientific society in the National Geographic Society. Alexander Graham Bell. History: Alexander Graham Bell. Famous Scientists. Who is credited with inventing the telephone? The Library of Congress. But if you see something that doesn't look right, click here to contact us! Subscribe for fascinating stories connecting the past to the present. He was an immigrant. Bell was born on March 3, , in Edinburgh, Scotland.

After attending school in Scotland and London, the year-old immigrated to Canada with his parents in Italian inventor and engineer Guglielmo Marconi developed, demonstrated and marketed the first successful long-distance wireless telegraph and in broadcast the first transatlantic radio signal.

He was an impassioned champion of a strong federal government, and played a key role in defending In his 84 years, Thomas Edison acquired a record number of 1, patents singly or jointly and was the driving force behind such innovations as the phonograph, the incandescent light bulb and one of the earliest motion picture cameras.

By turns charismatic and ruthless, brilliant and power hungry, diplomatic and Serbian-American engineer and physicist Nikola Tesla made dozens of breakthroughs in the production, transmission and application of electric power.

He invented the first alternating current AC motor and developed AC generation and transmission technology. In , Connecticut-born gun manufacturer Samuel Colt received a U. There was already one great electrical industry — the telegraph , whose wires crossed not only the continent but even the Atlantic Ocean.

The need for further innovations, such as a way to send multiple messages over a single telegraph wire, was well known and promised certain rewards.

But other ideas, such as a telegraph for the human voice, were far more speculative. The telegraph transmitted information via an intermittent current.

An electrical signal was either present or absent, forming the once-familiar staccato of Morse code. But Bell knew that speech sounds were complex, continuous waves. Bell still needed to prove his idea with an actual device. He struggled to find time to develop it among competing demands, including his teaching duties and his efforts — pushed by Hubbard — to perfect a multiple telegraph.

On 1 July , Bell succeeded in transmitting speech sounds, albeit unintelligible sounds. The U. Patent Office issued patent , to Bell on 7 March Although court battles over his telephone patents lasted for eighteen years, all cases were eventually resolved in his favor. Bell returned to in Boston and began a wide variety of experiments including one with a wire that was attached to a membrane on one end and dipped into acid on the other.

By the end of April, Hubbard complained that Bell would not perfect anything while he was flying from one thing to another. Bell thus returned to testing his original magneto design and succeeded on May Bell announced his discovery, first in lectures to Boston scientists, and then at the Philadelphia Centennial Exposition.

He was largely ignored until Brazilian emperor Dom Pedro II attracted attention to him by listening to Bell reciting Shakespeare over the telephone. It talks! Using magneto telephones, Watson and Bell spoke to each other over rented telegraph wires from points increasingly far apart. Gray and myself who shall complete our apparatus first," he observed, according to Charlotte Gray's Reluctant Genius: Alexander Graham Bell and the Passion for Invention.

In March , Bell received the telephone patent. Competitor Western Union hired other inventors, including Gray, to develop their own phone system, which led to a legal fight between the two businesses. Over the years, Bell vigorously defended his telephone patent in a number of other lawsuits. Bell created the photophone, which used light to transmit sound. Bell considered it to be one of his greatest inventions. He also used his gift for inventing to solve problems. After the death of his infant son in , Bell made a metal vacuum jacket to help with breathing.

This idea influenced the design of the iron lung device used to aid polio patients in the s. When an assassin shot President James Garfield in , Bell was asked to help the ailing leader.

He came up with an electromagnetic machine to detect where the bullet was lodged in Garfield's body. It failed at this task Garfield later died , but the device was a precursor to the modern metal detector.

He started out experimenting with kites in the s and even had a special building on his estate, Beinn Bhreagh, to work on these projects. After a lot of experimentation, Bell created an innovative kite design based on tetrahedrons.