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American and British linemen constructing telegraph and telephone line. Near Contay, France; 7/6/1918

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American and British linemen constructing telegraph and telephone line. Near Contay, France; 7/6/1918

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British Photographs of World War I

Public domain photograph related to development of telegraph, free to use, no copyright restrictions image - Picryl description

In the first grade, students summarize the need for money, how money is earned, and how money and credit are used in order to meet needs and wants including the costs and benefits of spending and saving. Students define and explain the roles of consumers and producers in the American economy. Students summarize how historic inventors and entrepreneurs contributed to the prosperity of the nation including Samuel F. B. Morse, John Deere, Alexander Graham Bell, Orville and Wilbur Wright, and Thomas Edison.

The invention of the telephone still remains a confusing morass of claims and counterclaims, which were not clarified by the huge mass of lawsuits to resolve the patent claims of commercial competitors. The Bell and Edison patents, however, dominated telephone technology and were upheld by court decisions in the United States. Bell has most often been credited as the inventor of the first practical telephone. Alexander Graham Bell was the first to patent the telephone as an "apparatus for transmitting vocal or other sounds telegraphically". The telephone exchange was an idea of the Hungarian engineer Tivadar Puskás (1844 - 1893) in 1876, while he was working for Thomas Edison on a telegraph exchange. Before the invention of the telephone switchboard, pairs of telephones were connected directly with each other, practically functioned as an intercom. Although telephones devices were in use before the invention of the telephone exchange, their success and economical operation would have been impossible with the schema and structure of the contemporary telegraph systems. A telephone exchange was operated manually by operators, or automatically by machine switching. It interconnects individual phone lines to make calls between them. The first commercial telephone exchange was opened at New Haven, Connecticut, with 21 subscribers on 28 January 1878, in a storefront of the Boardman Building in New Haven, Connecticut. George W. Coy designed and built the world's first switchboard for commercial use. The District Telephone Company of New Haven went into operation with only twenty-one subscribers, who paid $1.50 per month, a one-night price for a room in a city-center hotel. Coy was inspired by Alexander Graham Bell's lecture at the Skiff Opera House in New Haven on 27 April 1877. In Bell's lecture, during which a three-way telephone connection with Hartford and Middletown, Connecticut, was demonstrated, he first discussed the idea of a telephone exchange for the conduct of business and trade.

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Date

1914 - 1918
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Source

The U.S. National Archives
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