Electrical telegraphy is a point-to-point text messaging system, primarily used from the 1840s until the late 20th century.

A telegraph is a device for transmitting and receiving messages over long distances, i.e., for telegraphy. The word telegraph alone generally refers to an electrical telegraph. Wireless …

Sending and receiving dial telegraph apparatus used to demonstrate Wheatstone's alphabet dial telegraph invention. Norton was the first telegraph manufacturer in New York City and worked …

telegraph, any device or system that allows the transmission of information by coded signal over distance. Many telegraphic systems have been used over the centuries, but the term is most …

As a radio and telegraph operator and collector for over 70 years, I have assembled a collection of over 3000 telegraph keys, radios, microphones and scientific instrument descriptions and …

2023年3月24日 · The electrical telegraph was invented in 1837 by William Fothergill Cook (1806-1879) and Charles Wheatstone (1802-1875) in England with parallel innovations being made …

Telegraph service permitted short texts to be sent cheaply and arrive in a matter of minutes to hours, instead of days or weeks. Telegraphy facilitated faster and more profitable freight and …

53 VERY EARLY PALMER AND HALL OR HALL BOXED PORTABLE COMBINATION TELEGRAPH KEY AND RELAY SET: This extremely rare portable telegraph set is enclosed …

Starting about 1840 the telegraph that uses current through a wire to activate an electromagnet started. By 1865 there was over 83,000 miles of telegraph wire being used in the U.S. Even …

They were found in every town telegraph office across the continent. They consist of a telegraph key, ink-writing register, and galvanometer which measured the electrical condition of the …