Edward Augustin Calahan
Born 1838 - Died 1912
Improvement in Telegraphic Indicators
Edward Calahan invented the stock ticker in 1863, enabling quotes for stocks, bonds, and commodities to be transmitted directly from exchange floors to brokers and investors across the country. The New York Stock Exchange (NYSE) was one of the first to use the new device.
Calahan, working with George B. Field, also invented the pneumatic telegraph system, the first telecommunications system that allowed communication from a central station to multiple points within a district.
Calahan was born in Boston. Wanting to be part of a modern business, he left school at age eleven and became a telegrapher for the firm that later became the Western Union Company. While he was working as chief telegrapher in Western Unionís New York office, a chance encounter with a group of rushing messenger boys near one of New Yorkís many exchanges inspired him to improve exchange communications.