Edward A. Calahan
|Edward A. Calahan|
|Died||1912 (aged 73–74)|
|Known for||Invention of a ticker tape, gold and stock tickers, multiplex telegraph system|
Calahan came to New York City in 1861 and made his residence in Brooklyn. He joined as chief telegrapher in Western Union telegraph company's New York office at Manhattan. While working with Western Union, he encounter a group of rushing messenger boys which inspired him to improve exchange communications. These young men called runners had to dash from the Stock Exchange to their offices to report the changes in share values. Calahan realized that the prices could be sent directly via telegraph to each broker's office much more quickly and efficiently in a permanent stream of information. With the idea, he invented ticker tape in 1867. He was inducted to the National Inventors Hall of Fame in 2006 for this invention.
- New York Times:E.A. CALAHAN, INVENTOR, DIES; Originator of Gold and Stock Ticker and Multiplex Telegraph System.September 13, 1912
- Hall of fame;inventor profile;Edward Augustin Calahan;Improvement in Telegraphic Indicators;Patent No. 76,157
- Connected earth:Calahan, Edward Augustin;In 1867 Edward Calahan invented the first machine to print out the price of stocks and shares over telegraph wires.
- Patent number: 76157;Issue date: Mar 31, 1868