The Development of the Telephone As with many innovations, the idea for the telephone came along far sooner than it was brought to reality. While Italian innovator Antonio Meucci pictured at left is credited with inventing the first basic phone inand Frenchman Charles Bourseul devised a phone inAlexander Graham Bell won the first U. Bell began his research in and had financial backers who gave him the best business plan for bringing it to market.
March 3,in Edinburgh, Scotland Death: Bell while working on a multiple telegraph, developed the basic ideas for the telephon Bell files first patent for improved telegraphy Bell and Watson transmit the first complete sentence Bell files patent application on February 14.
Ring at Bell Labs, but the technology didn't exist The first commercial touch-tone phones were a big hit in their preview at Seattle World's Fair.
Probably no means of communication has revolutionized the daily lives of ordinary people more than the telephone. Simply described, it is a system which converts sound, specifically the human voice, to electrical impulses of various frequencies and then back to a tone that sounds like the original voice.
InEnglishman Michael Faraday proved that vibrations of metal could be converted to electrical impulses. This was the technological basis of the telephone, but no one actually used this system to transmit sound until In that year, Johann Philip Reis in Germany is said to have built a simple apparatus that changed sound to electricity and back again to sound.
A crude device, it was incapable of transmitting most frequencies, and it was never fully developed. A practical telephone was actually invented independently by two men working in the United States, Elisha Gray and Scottish-born Alexander Graham Bell.
Incredibly, both men filed for a patent on their designs at the New York patent office on February 14,with Bell beating Gray by only two hours! Bell had worked tirelessly, experimenting with various types of mechanisms, while Gray had become discouraged.
According to the famous story, the first fully intelligible telephone call occurred on March 6,when Bell, in one room, called to his assistant in another room. The first telephone system, known as an exchange, which is a practical means of communicating between many people who have telephones, was installed in Hartford, Connecticut inand the first exchange linking two major cities was established between New York and Boston in The first exchange outside the United States was built in London in The exchange involved a group of operators working at a large switchboard.
The operators would answer an incoming telephone call and connect it manually to the party being called. The first automatic telephone exchange was patented by Almon Strowger of Kansas City in and installed inbut manual switchboards remained in common use until the middle of the twentieth century.
The coin operated pay telephone was patented by William Gray of Hartford in The first rotary dial telephone was developed in by Antoine Barnay in France. Although the first commercial mobile telephone service became available in St.
Louis, Missouri inthe mobile telephone would not become common for another four decades. The first touch-tone system - which used tones in the voice frequency range rather than pulses generated by rotary dials - was installed in Baltimore, MD, in Operators in a central switching office pushed the buttons; it was much too expensive for general use.
However, the Bell System was intrigued by touch-tone because it increased the speed of dialing.
By the early s, low-cost transistors and associated circuit components made the introduction of touch-tone into home telephones possible.Doerr said that in much of today’s poor world, “the payoff of clean water, in terms of community prosperity,” is at least 20‑to In our ranking, electricity was No.
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The cell phone industry is the fastest growing sector in the larger communications industry today. Right now, the Internet is one of the industries attracting use by the largest numbers of people globally.
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The voice mail can be accessed from anywhere in Nigeria or other countries throughout the world by using the cellular telephone or touch-tone telephone. For now, there are three kinds of pagers available and only Lagos and Abuja are within the coverage areas of paging services.
expressed by the World Bank (), high poverty level will lead to low growth and low growth will lead to high poverty level. Thus, economic growth is necessary for sustained economic development (Akanbi & Du Toit, ; World Bank, ). This paper investigates the contribution of agriculture to aggregate economic growth in Nigeria.