Ticker tape
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Ticker tape was the earliest electrical dedicated financial communications medium, transmitting stock price information over telegraph lines, in use from around 1870 to 1970. It consisted of a paper s
Women at the Waldorf-Astoria Hotel watching ticker tape, 1918
Edison gold & stock ticker
Hughes telegraph (1866–1914) transmitter keyboard to send text over telegraph wires to be printed as text on a paper tape. Manufactured by Siemens & Halske, Germany; range: 300–400 km
A ticker monitor, as shown in this picture on the Australian Securities Exchange trading floor, simulates ticker tape but uses a different method.
ADT Inc.
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ADT Inc., formerly the ADT Corporation, is an American security company that provides residential and small business electronic security, fire protection, and other related alarm monitoring services t
Ticker tape
…channels. Ticker tape stock price telegraphs were invented in 1867 by Edward A. Calahan, an employee of the American Telegraph Company who later founded The ADT Corporation. Although telegraphic printing systems were invented by Royal Earl House in 1846, early models were fragile, required hand-cranked power, frequently…
Yard sign indicating the presence of an ADT system at a home
ADT Service vehicle in Quebec, 2010