Anthony C. White

	Anthony C. White Anthony C. White was an American electrical engineer who improved the carbon microphone (then called transmitters) for use with telephones manufactured by the American Bell Telephone company. The White transmitter was known as the "solid back" transmitter from the heavy metal strap across the back of the unit that supported the rear of a carbon chamber. In the carbon chamber were carbon granules loosely pressed against a carbon button in front. The button was screwed to a mica diaphragm. The White design produced a stronger voice signal than the Hunnings "long distance" transmitter and became the standard transmitter on the "candlestick telephone".Coe, pages 37, 78 External links * ''Telephone'', filed 24 March 1892, issued 1 November 1892 See also Invention of the telephone The invention of the telephone was the culmination of work done by more than one individual, and led to an array of lawsuits relating to the patent claims of several individuals and numerous co ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]
picture info	Carbon Microphone The carbon microphone, also known as carbon button microphone, button microphone, or carbon transmitter, is a type of microphone, a transducer that converts sound to an electrical audio signal. It consists of two metal plates separated by granules of carbon. One plate is very thin and faces toward the speaking person, acting as a diaphragm. Sound waves striking the diaphragm cause it to vibrate, exerting a varying pressure on the granules, which in turn changes the electrical resistance between the plates. Higher pressure lowers the resistance as the granules are pushed closer together. A steady direct current is passed between the plates through the granules. The varying resistance results in a modulation of the current, creating a varying electric current that reproduces the varying pressure of the sound wave. In telephony, this undulating current is directly passed through the telephone wires to the central office. In public address systems it is amplified by an aud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Candlestick Telephone The candlestick telephone (or pole telephone) is a style of telephone that was common from the late 1890s to the 1940s. A candlestick telephone is also often referred to as a desk stand, an upright, or a stick phone. Candlestick telephones featured a mouth piece (transmitter) mounted at the top of the stand, and a receiver (ear phone) that was held by the user to the ear during a call. When the telephone was not in use, the receiver rested in the fork of the switch hook protruding to the side of the stand, thereby disconnecting the audio circuit from the telephone network. Design and features Candlestick telephones were designed with varying features. Most recognizable, candlesticks featured a base with a vertical cylindrical neck extending upright for up to in length. At the top of the stand was mounted a carbon microphone (''transmitter'') to speak into, and a switch hook extending sideways upon which an ear piece (''receiver'') was hung. To make or answer a telephone call, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Invention Of The Telephone The invention of the telephone was the culmination of work done by more than one individual, and led to an array of lawsuits relating to the patent claims of several individuals and numerous companies. Early development 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. The essential idea of this toy was that a diaphragm can collect voice sounds from the 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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	American Engineers American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" Americans, citizens and nationals of the United States of America American ancestry, people who self-identify their ancestry as "American" American English, the set of varieties of the English language native to the United States Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	American Inventors American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" Americans, citizens and nationals of the United States of America American ancestry, people who self-identify their ancestry as "American" American English, the set of varieties of the English language native to the United States Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]