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6 days ago · Phone helps you easily connect with family and friends, block spam callers, and know who’s calling before you answer – all with a simple, intuitive design. Powerful spam protection. See warnings...
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Dec 16, 1977 · Telefon: Directed by Don Siegel. With Charles Bronson, Lee Remick, Donald Pleasence, Tyne Daly. A Russian officer is sent to the U.S. to try and stop sleeper agents who will mindlessly attack government entities when they hear certain coded words.
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- Overview
- The telephone instrument
- Working components of the telephone
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A telephone is an instrument designed for the simultaneous transmission and reception of the human voice. Telephones are inexpensive and simple to operate, and they offer an immediate, personal type of communication. Billions of telephones are in use around the world.
When was the telephone patented?
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.
When was the telephone introduced to the public?
One of the earliest demonstrations of the telephone occurred in June 1876 at the Centennial Exposition in Philadelphia.
Who is credited as the inventor of the telephone?
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 derived from the inventions of Alexander Graham Bell a...
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 receiver, and an anti-sidetone circuit. These components are described in turn below.
Britannica Quiz
Learn about the invention, development, and components of the telephone, an instrument for transmitting and receiving human voice. Explore the history of the telephone from Alexander Graham Bell to the modern digital device.
A telephone, colloquially referred to as a phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly.
Telefon is a 1977 spy film directed by Don Siegel and starring Charles Bronson, Lee Remick and Donald Pleasence. The screenplay by Peter Hyams and Stirling Silliphant is based on the 1975 novel by Walter Wager.
A smartphone, often simply called a phone, is a mobile device that combines the functionality of a traditional mobile phone with advanced computing capabilities.
Find My Device makes it easy to locate, ring, or wipe your device from the web.
